Reverse Engineering Pioneer Pro DJ Link — Full Session Transcript

total 112
drwxr-xr-x@ 14 noah  staff    448 Jun  7 08:12 .
drwxr-xr-x@  3 noah  staff     96 Jun  7 08:12 ..
drwxr-xr-x@  3 noah  staff     96 Jun  7 08:12 .claude
drwxr-xr-x@  3 noah  staff     96 Jun  7 08:12 .context
-rw-r--r--@  1 noah  staff     69 Jun  7 08:12 .git
-rw-r--r--@  1 noah  staff     62 Jun  7 08:12 .gitignore
-rw-r--r--@  1 noah  staff    606 Jun  7 08:12 CLAUDE.md
-rw-r--r--@  1 noah  staff    452 Jun  7 08:12 README.md
drwxr-xr-x@ 17 noah  staff    544 Jun  7 08:12 app
-rw-r--r--@  1 noah  staff     54 Jun  7 08:12 go.work
-rw-r--r--@  1 noah  staff  35265 Jun  7 08:12 go.work.sum
drwxr-xr-x@  5 noah  staff    160 Jun  7 08:12 link
drwxr-xr-x@  8 noah  staff    256 Jun  7 08:12 magefiles
drwxr-xr-x@ 15 noah  staff    480 Jun  7 08:12 www
---LINK---
link/go.mod
link/link_test.go
link/link.go
---APP---
total 120
drwxr-xr-x@ 17 noah  staff    544 Jun  7 08:12 .
drwxr-xr-x@ 14 noah  staff    448 Jun  7 08:12 ..
-rw-r--r--@  1 noah  staff     65 Jun  7 08:12 .gitignore
drwxr-xr-x@  6 noah  staff    192 Jun  7 08:12 analysis
drwxr-xr-x@  3 noah  staff     96 Jun  7 08:12 api
-rw-r--r--@  1 noah  staff    321 Jun  7 08:12 app.go
drwxr-xr-x@  5 noah  staff    160 Jun  7 08:12 cmd
drwxr-xr-x@  6 noah  staff    192 Jun  7 08:12 collection
drwxr-xr-x@ 11 noah  staff    352 Jun  7 08:12 db
drwxr-xr-x@  4 noah  staff    128 Jun  7 08:12 doc
drwxr-xr-x@  3 noah  staff     96 Jun  7 08:12 gen
-rw-r--r--@  1 noah  staff   6250 Jun  7 08:12 go.mod
-rw-r--r--@  1 noah  staff  42076 Jun  7 08:12 go.sum
drwxr-xr-x@  3 noah  staff     96 Jun  7 08:12 imports
drwxr-xr-x@  4 noah  staff    128 Jun  7 08:12 music
drwxr-xr-x@ 12 noah  staff    384 Jun  7 08:12 onelib
drwxr-xr-x@ 12 noah  staff    384 Jun  7 08:12 ui

1	// Package link generates and resolves shareable catalog links.
2	package link
3	
4	// New returns a shareable link for the given catalog item id.
5	func New(id string) string {
6		return "deadca7://item/" + id
7	}
8	

1	package link
2	
3	import "testing"
4	
5	func TestNew(t *testing.T) {
6		if got, want := New("abc"), "deadca7://item/abc"; got != want {
7			t.Errorf("New(\"abc\") = %q, want %q", got, want)
8		}
9	}
10	

1	module github.com/nzoschke/deadca7/link
2	
3	go 1.26.4
4	

1	go 1.26.4
2	
3	use (
4		./app
5		./link
6		./magefiles
7		./www
8	)
9	

1	// Package app holds the core catalog logic for deadca7.
2	package app
3	
4	import "github.com/nzoschke/deadca7/link"
5	
6	// Item is a single audio/video entry in the catalog.
7	type Item struct {
8		ID    string
9		Title string
10	}
11	
12	// Share returns a shareable link for the item.
13	func (i Item) Share() string {
14		return link.New(i.ID)
15	}
16	

link/go.mod:1:module github.com/nzoschke/deadca7/link
app/app.go:4:import "github.com/nzoschke/deadca7/link"
app/app.go:14:	return link.New(i.ID)
app/go.mod:13:	github.com/nzoschke/deadca7/link v0.0.0
app/go.mod:129:replace github.com/nzoschke/deadca7/link => ../link

===magefiles===
app.go
deps.go
go.mod
go.sum
magefile.go
www.go
===www===
AGENTS.md
README.md
assets
cmd
content
docs
go.mod
go.sum
internal
static
===app/cmd===
app/cmd/deadca7/contents.go
app/cmd/deadca7/imports.go
app/cmd/deadca7/playlists.go
app/cmd/deadca7/collections.go
app/cmd/deadca7/flow_test.go
app/cmd/deadca7/artists.go
app/cmd/deadca7/main.go
app/cmd/deadca7/root.go
app/cmd/app/browser_test.go
app/cmd/app/main.go
app/cmd/app/audio.go
app/cmd/openapi/main.go
===README===
# deadca7

Dead Easy Audio / Video Catalog for DJs

## Development

```bash
brew install direnv golang
cp www/.envrc.example ../.envrc # move config outside of git worktree
direnv allow

go install github.com/magefile/mage@latest
mage deps          # install templ, tailwindcss, sqlc
mage www:dev       # run the web app on :8090 with hot reload
mage app:dev       # run the catalog app on :8091 with hot reload
```

Run `mage -l` to list all targets.

1	package main
2	
3	import (
4		"bytes"
5		"encoding/json"
6		"net/http/httptest"
7		"path/filepath"
8		"testing"
9	
10		"github.com/cockroachdb/errors"
11		"github.com/go-fuego/fuego"
12		"github.com/nzoschke/deadca7/app/api"
13		"github.com/nzoschke/deadca7/app/collection"
14		"github.com/nzoschke/deadca7/app/db"
15		"github.com/stretchr/testify/require"
16		_ "modernc.org/sqlite"
17	)
18	
19	// run executes the CLI in-process against base, returning stdout and exit code.
20	func run(t *testing.T, base string, args ...string) (string, int) {
21		t.Helper()
22		root := newRoot()
23		out := &bytes.Buffer{}
24		root.SetOut(out)
25		root.SetErr(&bytes.Buffer{})
26		root.SetArgs(append([]string{"--base-url", base}, args...))
27	
28		code := 0
29		if err := root.Execute(); err != nil {
30			code = exitAPI
31			var ee *exitError
32			if errors.As(err, &ee) {
33				code = ee.code
34			}
35		}
36		return out.String(), code
37	}
38	
39	func id(t *testing.T, out string) string {
40		t.Helper()
41		var v struct {
42			ID int64 `json:"id"`
43		}
44		require.NoError(t, json.Unmarshal([]byte(out), &v))
45		require.NotZero(t, v.ID)
46		return itoa(v.ID)
47	}
48	
49	func itoa(v int64) string {
50		b, _ := json.Marshal(v)
51		return string(b)
52	}
53	
54	func TestFlow(t *testing.T) {
55		r := require.New(t)
56	
57		sdb, err := db.Open(filepath.Join(t.TempDir(), "test.db"))
58		r.NoError(err)
59		defer sdb.Close()
60	
61		s := fuego.NewServer(fuego.WithoutAutoGroupTags())
62		api.Register(s, collection.New(sdb), nil)
63		ts := httptest.NewServer(s.Mux)
64		defer ts.Close()
65	
66		var collID, plID, cntID string
67	
68		steps := []struct {
69			name   string
70			args   []string
71			code   int
72			assert func(t *testing.T, out string)
73		}{
74			{
75				name: "create collection",
76				args: []string{"collections", "create", "--name", "Live 77", "--slug", "live-77"},
77				assert: func(t *testing.T, out string) {
78					require.Contains(t, out, `"slug": "live-77"`)
79					collID = id(t, out)
80				},
81			},
82			{
83				name: "get collection",
84				args: []string{"collections", "get", ""},
85				assert: func(t *testing.T, out string) {
86					require.Contains(t, out, `"name": "Live 77"`)
87				},
88			},
89			{
90				name: "list collections",
91				args: []string{"collections", "list"},
92				assert: func(t *testing.T, out string) {
93					require.Contains(t, out, "live-77")
94				},
95			},
96			{
97				name: "create content",
98				args: []string{"contents", "create", "--title", "Scarlet Begonias", "--artist", "GD", "--track-no", "1"},
99				assert: func(t *testing.T, out string) {
100					require.Contains(t, out, "Scarlet Begonias")
101					cntID = id(t, out)
102				},
103			},
104			{
105				name: "create playlist",
106				args: []string{"playlists", "create", "--collection", "", "--name", "Set 1"},
107				assert: func(t *testing.T, out string) {
108					require.Contains(t, out, `"name": "Set 1"`)
109					plID = id(t, out)
110				},
111			},
112			{
113				name: "add content to playlist",
114				args: []string{"playlists", "add", "", "", "--seq", "0"},
115			},
116			{
117				name: "list playlist contents",
118				args: []string{"playlists", "contents", ""},
119				assert: func(t *testing.T, out string) {
120					require.Contains(t, out, "Scarlet Begonias")
121				},
122			},
123			{
124				name: "missing required flag is a usage error",
125				args: []string{"collections", "create", "--name", "no slug"},
126				code: exitUsage,
127			},
128			{
129				name: "not found is an api error",
130				args: []string{"collections", "get", "999999"},
131				code: exitAPI,
132			},
133			{
134				name: "delete collection",
135				args: []string{"collections", "delete", ""},
136			},
137		}
138	
139		for _, tt := range steps {
140			t.Run(tt.name, func(t *testing.T) {
141				args := patch(tt.args, collID, plID, cntID)
142				out, code := run(t, ts.URL, args...)
143				require.Equal(t, tt.code, code, "out=%s", out)
144				if tt.assert != nil {
145	

… truncated — see the raw .jsonl for the full output.

The server returned HTTP 404 Not Found.

The response body was not retrieved. If this URL requires authentication, use an authenticated tool (e.g. `gh` for GitHub, or an MCP-provided fetch tool) instead of WebFetch.

The server returned HTTP 404 Not Found.

The response body was not retrieved. If this URL requires authentication, use an authenticated tool (e.g. `gh` for GitHub, or an MCP-provided fetch tool) instead of WebFetch.

anlz 0 dir
announce.go 3462 file
device.go 1229 file
discover.go 1642 file
link.go 2095 file
link_test.go 7225 file
media.go 3077 file
meta.go 2007 file
net.go 1327 file
nfs 0 dir
pdb.go 1219 file
pdb 0 dir
status.go 7438 file
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

Web search results for query: "Pioneer Pro DJ Link protocol UDP ports 50000 50001 50002 beat announce status packet dysentery"

Links: [{"title":"GitHub - kyleawayan/opus-quad-pro-dj-link-analysis: Pioneer DJ OPUS-QUAD Pro DJ Link Analysis · GitHub","url":"https://github.com/kyleawayan/opus-quad-pro-dj-link-analysis"},{"title":"Packet Types - DJ Link Ecosystem Analysis - Deep Symmetry","url":"https://djl-analysis.deepsymmetry.org/djl-analysis/packets.html"},{"title":"GitHub - Deep-Symmetry/dysentery: Exploring ways to participate in a Pioneer Pro DJ Link network · GitHub","url":"https://github.com/Deep-Symmetry/dysentery"},{"title":"GitHub - evanpurkhiser/prolink-connect: A Typescript / JavaScript library that is able to talk to Pioneer PROLINK enabled DJ equipment · GitHub","url":"https://github.com/evanpurkhiser/prolink-connect"},{"title":"What is the PRO DJ LINK function? – AlphaTheta Help Center","url":"https://support.pioneerdj.com/hc/en-us/articles/4405902925593-What-is-the-PRO-DJ-LINK-function"},{"title":"Pro DJ Link: Learn 5 “Secret” Features Of Pioneer DJ’s Protocol - MyHouseRadio FM - House Music Deep Soulful and Classics","url":"https://www.myhouseradio.fm/2018/10/22/pro-dj-link-learn-5-secret-features-of-pioneer-djs-protocol/"},{"title":"Pioneer Timecode Synchronization Software for PRO DJ LINK | ProDJLink","url":"https://www.prodjlink.com/"},{"title":"Pro DJ Link: How To Set Up Pioneer DJ Setups Properly - DJ TechTools","url":"https://djtechtools.com/2018/07/31/pro-dj-link-how-to-set-up-pioneer-dj-setups-properly/"},{"title":"Pioneer Pro DJ link: the ULTIMATE guide – DeeJay Plaza","url":"https://www.deejayplaza.com/en/articles/pro-dj-link"}]

Based on the search results, I found relevant information about the Pioneer Pro DJ Link protocol and the UDP ports you mentioned:

## Pioneer Pro DJ Link Protocol - UDP Ports

Packets sent to port 50000 seem primarily related to announcing the devices present on the network, and negotiating the channel (device) number assigned to each. Packets sent to port 50001 seem primarily related to beat synchronization, which is a core element of the protocol.

When you send your first announce packet on port 50000, the OPUS-QUAD will start sending UDP packets to you on port 50002.

## Packet Structure

DJ Link packets seem to all start with a fixed sequence of ten bytes, 51 73 70 74 31 57 6d 4a 4f 4c, which is followed by a byte that (combined with the port on which it was received) identifies what kind of information is found in the packet. For example, 06 is an announce packet, so a packet starting with 51 73 70 74 31 57 6d 4a 4f 4c 06 means it is an announce packet.

## Dysentery

The information was discovered by studying packet captures and with the help of dysentery, a bespoke protocol analysis tool written in Clojure. Dysentery is a research and reverse-engineering project that has been instrumental in documenting the Pro DJ Link protocol specifications.


REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks.

═══════════ link.go ═══════════
package link

import (
	"context"
	"net"
	"time"

	"github.com/nzoschke/codon/pkg/link/pdb"
	"github.com/pkg/errors"
)

type Callbacks struct {
	OnAir    func(Status) error
	OnDevice func(Device) error
	OnMeta   func(Status, Metadata, pdb.Track) error
	OnMount  func(Status, pdb.PDB) error
	OnStatus func(Status) error
	OnTrack  func(Status) error
}

type Link struct {
	Airs    map[DeviceID]bool     // latest onAir
	Devices map[DeviceID]Device   // latest devices
	Masters map[DeviceID]bool     // latest master
	Metas   map[DeviceID]Metadata // first track metadata
	Mnts    map[DeviceSlot]PDBMnt // latest PDB mounts
	Tracks  map[DeviceID]Status   // first track status

	cbs Callbacks

	c0 *net.UDPConn
	c2 *net.UDPConn
}

func New(cbs Callbacks) (*Link, func() error, error) {
	c0, err := net.ListenUDP("udp", &net.UDPAddr{
		IP:   net.IPv4zero,
		Port: 50000,
	})
	if err != nil {
		return nil, nil, errors.WithStack(err)
	}

	c2, err := net.ListenUDP("udp", &net.UDPAddr{
		IP:   net.IPv4zero,
		Port: 50002,
	})
	if err != nil {
		return nil, nil, errors.WithStack(err)
	}

	close := func() error {
		if err := c0.Close(); err != nil {
			return errors.WithStack(err)
		}

		if err := c2.Close(); err != nil {
			return errors.WithStack(err)
		}

		return nil
	}

	return &Link{
		Airs:    map[DeviceID]bool{},
		Devices: map[DeviceID]Device{},
		Masters: map[DeviceID]bool{},
		Metas:   map[DeviceID]Metadata{},
		Mnts:    map[DeviceSlot]PDBMnt{},
		Tracks:  map[DeviceID]Status{},

		cbs: cbs,

		c0: c0,
		c2: c2,
	}, close, nil
}

func (l *Link) Start(ctx context.Context) error {
	name := "vizlab"
	id := DeviceID(7)

	_, ipNet, addr, _, err := l.Announce(ctx, name, id, 5*time.Second)
	if err != nil {
		return errors.WithStack(err)
	}

	errch := make(chan error)

	go func() {
		errch <- l.KeepAlive(ctx, name, id, ipNet, addr)
	}()

	go func() {
		errch <- l.Discover(ctx)
	}()

	// FIXME: device discovery or retry mounts
	time.Sleep(5 * time.Second)
	go func() {
		errch <- l.Status(ctx)
	}()

	err = <-errch

	if err != nil {
		return errors.WithStack(err)
	}

	return nil
}
═══════════ link_test.go ═══════════
package link_test

import (
	"context"
	"errors"
	"slices"
	"testing"
	"time"

	"github.com/nzoschke/codon/pkg/link"
	"github.com/nzoschke/codon/pkg/link/nfs"
	"github.com/nzoschke/codon/pkg/link/pdb"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"golang.org/x/sync/errgroup"
)

// These tests require at least 1 CDJ with at least 1 media on the network

// TestInit verifies that one device is detected, a virtual CDJ is announced, and receives another player status,
// by sequentially receiving packets.
func TestInit(t *testing.T) {
	ctx := t.Context()
	a := assert.New(t)

	l, close, err := link.New(link.Callbacks{})
	a.NoError(err)
	defer close()

	vcdjID := link.DeviceID(8)
	_, _, _, s, err := l.Announce(ctx, "vizlink", vcdjID, 5*time.Second)
	a.NoError(err)

	a.Equal(s.PlayerName, "CDJ-3000")
	a.NotEqual(s.Device, vcdjID)
}

// TestDevices verifies that all devices are detected by contually processing keep-alive packets.
func TestDevices(t *testing.T) {
	ctx := t.Context()
	a := assert.New(t)

	ds := map[link.DeviceID]link.Device{}
	l, close, err := link.New(link.Callbacks{
		OnDevice: func(d link.Device) error {
			ds[d.ID] = d
			return nil
		},
	})
	a.NoError(err)
	defer close()

	vcdjID := link.DeviceID(8)
	_, _, _, _, err = l.Announce(ctx, "vizlink", vcdjID, 5*time.Second)
	a.NoError(err)

	ctx, cancel := context.WithTimeout(ctx, 3*time.Second)
	defer cancel()
	err = l.Discover(ctx)
	a.ErrorIs(err, context.DeadlineExceeded)

	a.Greater(len(ds), 3)
}

// TestStatuses verifies that all CDJ status is tracked by contually processing packets.
func TestStatuses(t *testing.T) {
	ctx := t.Context()
	a := assert.New(t)

	ss := []link.Status{}
	ds := map[link.DeviceID]link.Status{}
	l, close

… truncated — see the raw .jsonl for the full output.

No matches found

lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
	inet 127.0.0.1 netmask 0xff000000
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
anpi0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
anpi2: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
anpi1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
en4: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
en5: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
en7: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
en1: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
en2: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
en3: flags=8963<UP,BROADCAST,SMART,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
bridge0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
utun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500
ap1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	inet 192.168.0.160 netmask 0xffffff00 broadcast 192.168.0.255
awdl0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
llw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
utun1: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
utun2: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 2000
utun3: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1000
utun4: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
utun5: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
utun6: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
utun7: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
utun8: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380
utun9: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1380

192.168.0.192    type=0x06 name="CDJ-3000" len=54
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

	github.com/cockroachdb/errors v1.13.0
---

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/capture/main.go (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/go.mod has been updated successfully. (file state is current in your context — no need to Read it back)

go version go1.26.4 darwin/arm64
---
/opt/homebrew/bin/go
GOFLAGS= GOTOOLCHAIN=

go: downloading github.com/cockroachdb/errors v1.13.0
go: downloading github.com/getsentry/sentry-go v0.46.0
go: downloading github.com/stretchr/testify v1.8.4
go: downloading golang.org/x/text v0.23.0
---BUILD---
go: downloading golang.org/x/sync v0.20.0
go: downloading golang.org/x/sys v0.45.0
go: downloading golang.org/x/text v0.37.0
OK

captured 7 packets to testdata/keepalive.jsonl
---FIXTURE---
       7 testdata/keepalive.jsonl
{"data":"5173707431576d4a4f4c404e58532d4757000000000000000000000000000001011900020201","len":38,"port":50002,"src":"192.168.0.192:44182","ts":1780847621951}
{"data":"5173707431576d4a4f4c060043444a2d33303030000000000000000000000000010300360301c83dfc1126c2c0a800c0010000000164","len":54,"port":50000,"src":"192.168.0.192:45873","ts":1780847622255}

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet.go (file state is current in your context — no need to Read it back)

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet_test.go (file state is current in your context — no need to Read it back)

ok  	github.com/nzoschke/deadca7/link	0.212s
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md (file state is current in your context — no need to Read it back)

go: downloading github.com/jackc/pgx/v5 v5.9.2
go: downloading github.com/gorilla/schema v1.4.1
go: downloading github.com/gabriel-vasile/mimetype v1.4.11
go: downloading github.com/oasdiff/yaml v0.0.9
go: downloading github.com/woodsbury/decimal128 v1.4.0
go: downloading github.com/mailru/easyjson v0.9.1
go: downloading github.com/oasdiff/yaml3 v0.0.9
go: downloading modernc.org/libc v1.72.3
go: downloading github.com/mattn/go-isatty v0.0.21
app/ui/assets/embed.go:5:12: pattern css/output.css: no matching files found
build exit=0
vet exit=0

captured 37 packets to testdata/devices.jsonl
---SUMMARY (src / port / type / name)---
192.168.0.193   port=50001 type=0x03 name='JM-V10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01' count=25 len=53
192.168.0.192   port=50000 type=0x06 name='CDJ-3000'   count=4 len=54
192.168.0.192   port=50002 type=0x40 name='XS-GW\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01' count=4 len=38
192.168.0.193   port=50000 type=0x06 name='DJM-V10'    count=4 len=54

DJM-V10 keepalive:
  name   DJM-V10
  device 33
  ip     192.168.0.193
  mac    c8:3d:fc:12:9e:d5

50001 type=0x03 (len 53):
  5173707431576d4a4f4c03444a4d2d5631300000000000000000000000000001032100110000000000000000000000000000000000
  name@0x0b DJM-V10
  byte 0x1f..end: 01032100110000000000000000000000000000000000

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet_test.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet_test.go has been updated successfully. (file state is current in your context — no need to Read it back)

ok  	github.com/nzoschke/deadca7/link	0.214s
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

Command running in background with ID: bc9oek0nc. Output is being written to: /private/tmp/claude-501/-Users-noah-conductor-workspaces-deadca7-san-diego/5e143c63-1d6b-4233-91af-bb63e39e8beb/tasks/bc9oek0nc.output. You will be notified when it completes. To check interim output, use Read on that file path.

total lines: 314
192.168.0.192   port=50000 type=0x06 count=  28 lens=[54]
192.168.0.192   port=50001 type=0x28 count=  28 lens=[96]
192.168.0.192   port=50002 type=0x40 count=  30 lens=[38]
192.168.0.193   port=50000 type=0x06 count=  30 lens=[54]
192.168.0.193   port=50001 type=0x03 count= 198 lens=[53]

beat packets: 28
sample hex: 5173707431576d4a4f4c2843444a2d33303030000000000000000000000000010003003c00000258000004b00000096000000960000012c0000012c0ffffffffffffffffffffffffffffffffffffffffffffffff000ffbe70000271001000003
name@0x0b: CDJ-3000
  #0 dev=3 bpm=100.00 beat-in-bar=1 pitch_raw=1047527
  #1 dev=3 bpm=100.00 beat-in-bar=2 pitch_raw=1047527
  #2 dev=3 bpm=100.00 beat-in-bar=3 pitch_raw=1049100
  #3 dev=3 bpm=100.00 beat-in-bar=4 pitch_raw=1109917
  #4 dev=3 bpm=100.00 beat-in-bar=1 pitch_raw=1067450
  #5 dev=3 bpm=100.00 beat-in-bar=2 pitch_raw=1053294
  #6 dev=3 bpm=100.00 beat-in-bar=3 pitch_raw=1053294
  #7 dev=3 bpm=100.00 beat-in-bar=4 pitch_raw=1053294
beat-in-bar sequence: [1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4, 1, 2, 3, 4]

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet.go has been updated successfully. (file state is current in your context — no need to Read it back)

beats.jsonl
devices.jsonl

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet_test.go has been updated successfully. (file state is current in your context — no need to Read it back)

ok  	github.com/nzoschke/deadca7/link	0.223s
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]

<tool_use_error>String to replace not found in file.
String: ### Beat sync — port 50001
- [ ] beat packet (type 0x28): BPM, beat-in-bar, pitch, next/prev beat timing
- [ ] mixer type 0x03 (~3/s from DJM-V10, name at 0x0b not 0x0c) — identify & decode
- [ ] capture across a tempo change and a loaded vs. stopped deck

### Status — port 50002
- [ ] CDJ status (type 0x0a): play state, BPM, pitch, on-air, master, sync
- [ ] loaded-track fields: track ID, source player, source slot (SD/USB)
- [ ] mixer status (DJM) if present
- [ ] capture scenarios: idle, track loaded, playing, two-deck, on-air toggle
(note: Edit also tried swapping \uXXXX escapes and their characters; neither form matched, so the mismatch is likely elsewhere in old_string. Re-read the file and copy the exact surrounding text.)</tool_use_error>

28	### Beat sync — port 50001
29	- [ ] beat packet (type 0x28): BPM, beat-within-bar, pitch, next/prev beat timing
30	- [ ] mixer type 0x03 (~3/s from DJM-V10, name at 0x0b not 0x0c) — identify & decode
31	- [ ] capture across a tempo change and a loaded vs. stopped deck
32	
33	### Status — port 50002
34	- [ ] CDJ status (type 0x0a): play state, BPM, pitch, on-air, master, sync
35	- [ ] loaded-track fields: track ID, source player, source slot (SD/USB)
36	- [ ] mixer status (DJM) if present
37	- [ ] capture scenarios: idle, track loaded, playing, two-deck, on-air toggle
38	
39	## crate-digger — rekordbox database (over NFS)
40	
41	Reached only after the virtual CDJ announces and a deck reports a loaded track.
42	
43	- [ ] RPC portmap (port 111) — GETPORT for mount + nfs
44	- [ ] MOUNT — mount the media slot, obtain root file handle
45	- [ ] NFS — LOOKUP + READ `PIONEER/rekordbox/export.pdb`
46	- [ ] PDB parse: tables (tracks, artists, albums, artwork, playlists)
47	- [ ] ANLZ parse: `.DAT`/`.EXT` (beat grid, cue points, waveforms)
48	- [ ] metadata-by-track-ID resolved against captured PDB
49	

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

═══════════ announce.go ═══════════
package link

import (
	"bytes"
	"context"
	"log/slog"
	"net"
	"time"

	"github.com/pkg/errors"
)

// Announce configures and announces a Virtual CDJ.
// To assert network functionality it blocks until one status from a real CDJ is received, or times out with an error.
func (l *Link) Announce(ctx context.Context, name string, id DeviceID, timeout time.Duration) (net.IP, *net.IPNet, net.HardwareAddr, Status, error) {
	dctx, cancel := context.WithTimeout(ctx, timeout)
	defer cancel()

	// discover first device
	d, err := l.discover(dctx)
	if err != nil {
		return nil, nil, nil, Status{}, errors.WithStack(err)
	}

	slog.Info("Announce.discover", "name", d.Name, "id", d.ID, "ip", d.IP.String())

	// find interface and broadcast that matches discovered device
	iface, err := iface(d.IP)
	if err != nil {
		return nil, nil, nil, Status{}, errors.WithStack(err)
	}

	ipNet, err := ipNet(iface)
	if err != nil {
		return nil, nil, nil, Status{}, errors.WithStack(err)
	}

	addr := bcast(ipNet)

	// announce virtual CDJ
	slog.Info("Announce.keepalive", "name", name, "id", id, "ip", ipNet.IP.String(), "addr", iface.HardwareAddr.String(), "broadcast", addr.IP.String())
	_, err = l.c0.WriteToUDP(keepalive(name, id, iface.HardwareAddr, ipNet.IP), addr)
	if err != nil {
		return nil, nil, nil, Status{}, errors.WithStack(err)
	}

	// get first status
	sctx, cancel := context.WithTimeout(ctx, timeout)
	defer cancel()
	s, err := l.status(sctx)
	if err != nil {
		return nil, nil, nil, Status{}, errors.WithStack(err)
	}

	slog.Info("Announce.status", "name", s.PlayerName, "id", s.Device, "track", s.TrackID, "onAir", s.IsOnAir, "master", s.IsMaster, "sync", s.IsSync, "usb", s.USBState, "sd", s.SDState)

	return d.IP, ipNet, iface.HardwareAddr, s, nil
}

// KeepAlive periodically sends Virtual CDJ keep-alive packets to all devices
// https://djl-analysis.deepsymmetry.org/djl-analysis/packets.html#_port_50000_packets
// https://djl-analysis.deepsymmetry.org/djl-analysis/startup.html#cdj-keep-alive
func (l *Link) KeepAlive(ctx context.Context, name string, id DeviceID, ipNet *net.IPNet, addr net.HardwareAddr) error {
	slog.Info("KeepAlive", "name", name, "id", id, "ip", ipNet.IP.String(), "addr", addr.String(), "broadcast", bcast(ipNet))

	t := time.NewTicker(1500 * time.Millisecond)
	defer t.Stop()

	for range t.C {
		_, err := l.c0.WriteToUDP(keepalive(name, id, addr, ipNet.IP), bcast(ipNet))
		if err != nil {
			return errors.WithStack(err)
		}
	}

	return nil
}

// https://djl-analysis.deepsymmetry.org/djl-analysis/startup.html#cdj-keep-alive
func keepalive(name string, id DeviceID, addr net.HardwareAddr, ip net.IP) []byte {
	n := make([]byte, 20)
	copy(n[:], []byte(name))

	return bytes.Join([][]byte{
		header,                // 0x00: 10 byte header
		{0x06, 0x00},          // 0x0A: 02 byte announce packet type
		n,                     // 0x0c: 20 byte device name
		{0x01, 0x02},          // 0x20: 02 byte subtype
		{0x00, 0x36},          // 0x22: 02 byte len_p
		{byte(id)},            // 0x24: 01 byte for the player ID
		{byte(DeviceTypeCDJ)}, // 0x25: 01 byte for the player type
		addr[:6],              // 0x26: 06 byte mac address
		ip.To4(),              // 0x2C: 04 byte IP address
		{0x01},                // 0x30: 01 byte number peer devices
		{0x00, 0x00, 0x00},    // 0x31: 03 byte padding
		{byte(DeviceTypeCDJ)}, // 0x34: 01 byte for the player type
		{0x00},                // 0x35: 01 byte final padding
	}, nil)
}
═══════════ net.go ═══════════
package link

import (
	"fmt"
	"net"

	"github.com/pkg/errors"
)

func bcast(ipNet *net.IPNet) *net.UDPAddr {
	ip := make(net.IP, net.IPv4len)
	for i, b := range ipNet.IP.To4() {
		ip[i] = b | ^ipNet.Mask[i]
	}

	return &net.UDPAddr{
		IP:   ip,
		Port: 50000,
	}
}

func iface(ip net.IP) (*net.Interface, error) {
	ifaces, err := net.Interfaces()
	if err != nil {
		return nil, erro

… truncated — see the raw .jsonl for the full output.

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/net.go (file state is current in your context — no need to Read it back)

# Pro DJ Link CDJ Startup Handshake Sequence

## Full Device-Number Self-Assignment Process

A virtual CDJ must complete this exact sequence before sending keep-alive packets:

### Stage 1: Initial Announcement (Type 0x0a)
**3 packets at ~300ms intervals**
- 25-byte packets broadcast to UDP port 50000
- Final byte: `0x01` (CDJ identifier, vs `0x02` for mixer)
- Announces device existence without claiming a channel

### Stage 2: First-Stage Device Number Claim (Type 0x00)
**3 packets at ~300ms intervals**
- 44-byte (`0x2c`) packets to port 50000 broadcast
- Byte `0x24` cycles through values `01`, `02`, `03`
- Includes MAC address
- Purpose unclear; possibly mixer uses this to assign channels

### Stage 3: Second-Stage Device Number Claim (Type 0x02)
**3 packets at ~300ms intervals**
- 50-byte (`0x32`) packets broadcast
- Claims specific device number `D` (player 1, 2, 3, etc.)
- Includes IP address and MAC address
- Byte `0x1f` = `01` for auto-assign mode, `02` for fixed channel
- Player observes network to select unused `D` value

### Stage 4: Final-Stage Device Number Claim (Type 0x04)
**3 packets at ~300ms intervals**
- 42-byte (`0x2a`) packets broadcast
- Confirms claimed device number `D`
- Bytes `0x24`-`0x25` contain device number and sequence counter

### Stage 5: Keep-Alive Packets (Type 0x06)
**Begins after final stage**
- 54-byte packets broadcast every ~1.5 seconds
- Maintains network presence and device number ownership
- Includes peer device count (`p`)

## Critical Timing Details

- Each three-packet series: **~900ms total** (3 packets × 300ms)
- Complete startup sequence: **~3.6 seconds minimum** (four stages)
- Keep-alive interval: **~1500ms**

## Channel Conflicts & Defense

If claiming a number already in use, the existing device sends a 41-byte (`0x29`) packet directly to the new player, forcing it to "give up on trying to claim channel."

## What Happens If You Skip the Claim Phase

The documentation doesn't explicitly state consequences, but the handshake structure suggests a virtual CDJ cannot reliably "retain presence on the network" without completing the full claiming sequence first.

=== search prolink-connect for announce/claim packet builders ===
(eval):1: no matches found: repos/evanpurkhiser/prolink-connect/git/trees/main?recursive=1
=== beat-link VirtualCdj claim methods ===
250:            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
251:            0x01, 0x02, 0x00, 0x36,  0x00, 0x01, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
252:            0x02, 0x00, 0x00, 0x00,  0x01, 0x64
312:            0x51, 0x73, 0x70, 0x74,  0x31, 0x57, 0x6d, 0x4a,   0x4f, 0x4c, 0x0a, 0x00,  0x62, 0x65, 0x61, 0x74,
313:            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
320:    private static final byte[] claimStage1bytes = {
321:            0x51, 0x73, 0x70, 0x74,  0x31, 0x57, 0x6d, 0x4a,   0x4f, 0x4c, 0x00, 0x00,  0x62, 0x65, 0x61, 0x74,
322:            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
323:            0x01, 0x03, 0x00, 0x2c,  0x0d, 0x01, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00
329:    private static final byte[] claimStage2bytes = {
331:            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
332:            0x01, 0x03, 0x00, 0x32,  0x00, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x0d, 0x00,
339:    private static final byte[] claimStage3bytes = {
341:            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
350:            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
351:            0x01, 0x02, 0x00, 0x32,  0x00, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
360:            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
361:            0x01, 0x02, 0x00, 0x29,  0x00, 0x00, 0x00, 0x00,   0x00
814:            Arrays.fill(claimStage1bytes, DEVICE_NAME_OFFSET, DEVICE_NAME_LENGTH, (byte)0);
815:            System.arraycopy(getDeviceName().getBytes(), 0, claimStage1bytes, DEVICE_NAME_OFFSET, getDeviceName().getBytes().length);
816:            System.arraycopy(keepAliveBytes, MAC_ADDRESS_OFFSET, claimStage1bytes, 0x26, 6);
818:                claimStage1bytes[0x24] = (byte)i;  // The packet counter.
821:                    DatagramPacket announcement = new DatagramPacket(claimStage1bytes, claimStage1bytes.length,
843:            Arrays.fill(claimStage2bytes, DEVICE_NAME_OFFSET, DEVICE_NAME_LENGTH, (byte)0);
844:            System.arraycopy(getDeviceName().getBytes(), 0, claimStage2bytes, DEVICE_NAME_OFFSET, getDeviceName().getBytes().length);
845:            System.arraycopy(matchedAddress.getAddress().getAddress(), 0, claimStage2bytes, 0x24, 4);
846:            System.arraycopy(keepAliveBytes, MAC_ADDRESS_OFFSET, claimStage2bytes, 0x28, 6);
847:            claimStage2bytes[0x2e] = (byte)claimingNumber.get();  // The number we are claiming.
848:            claimStage2bytes[0x31] = (getDeviceNumber() == 0)? (byte)1 : (byte)2;  // The auto-assign flag.
850:                claimStage2bytes[0x2f] = (byte)i;  // The packet counter.
852:                    logger.debug("Sending claim stage 2 packet {} for device {}", i, claimStage2bytes[0x2e]);
853:                    DatagramPacket announcement = new DatagramPacket(claimStage2bytes, claimStage2bytes.length,
881:            Arrays.fill(claimStage3bytes, DEVICE_NAME_OFFSET, DEVICE_NAME_LENGTH, (byte)0);
882:            System.arraycopy(getDeviceName().getBytes(), 0, claimStage3bytes, DEVICE_NAME_OFFSET, getDeviceName().getBytes().length);
883:            claimStage3bytes[0x24] = (byte)claimingNumber.get();  // The number we are claiming.
885:                claimStage3bytes[0x25] = (byte)i;  // The packet counter.
887:                    logger.debug("Sending claim stage 3 packet {} for device {}", i, claimStage3bytes[0x24]);
888:         

… truncated — see the raw .jsonl for the full output.

     */
    private final DeviceUpdateListener updateListener = this::processUpdate;

    @API(status = API.Status.STABLE)
    public DeviceUpdateListener getUpdateListener() {
        return updateListener;
    }

    /**
     * The initial packet sent three times when coming online.
     */
    private static final byte[] helloBytes = {
            0x51, 0x73, 0x70, 0x74,  0x31, 0x57, 0x6d, 0x4a,   0x4f, 0x4c, 0x0a, 0x00,  0x62, 0x65, 0x61, 0x74,
            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x01, 0x04, 0x00, 0x26,  0x01, 0x40
    };

    /**
     * The first-stage device number claim packet series.
     */
    private static final byte[] claimStage1bytes = {
            0x51, 0x73, 0x70, 0x74,  0x31, 0x57, 0x6d, 0x4a,   0x4f, 0x4c, 0x00, 0x00,  0x62, 0x65, 0x61, 0x74,
            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x01, 0x03, 0x00, 0x2c,  0x0d, 0x01, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00
    };

    /**
     * The second-stage device number claim packet series.
     */
    private static final byte[] claimStage2bytes = {
            0x51, 0x73, 0x70, 0x74,  0x31, 0x57, 0x6d, 0x4a,   0x4f, 0x4c, 0x02, 0x00,  0x62, 0x65, 0x61, 0x74,
            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x01, 0x03, 0x00, 0x32,  0x00, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x0d, 0x00,
            0x01, 0x00
    };

    /**
     * The third-stage (final) device number claim packet series.
     */
    private static final byte[] claimStage3bytes = {
            0x51, 0x73, 0x70, 0x74,  0x31, 0x57, 0x6d, 0x4a,   0x4f, 0x4c, 0x04, 0x00,  0x62, 0x65, 0x61, 0x74,
            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x01, 0x03, 0x00, 0x26,  0x0d, 0x00
    };

    /**
     * Packet used to acknowledge a mixer's intention to assign us a device number.
     */
    private static final byte[] assignmentRequestBytes = {
            0x51, 0x73, 0x70, 0x74,  0x31, 0x57, 0x6d, 0x4a,   0x4f, 0x4c, 0x02, 0x01,  0x62, 0x65, 0x61, 0x74,
            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x01, 0x02, 0x00, 0x32,  0x00, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x01, 0x00
    };

    /**
     * Packet used to tell another device we are already using a device number.
     */
    private static final byte[] deviceNumberDefenseBytes = {
            0x51, 0x73, 0x70, 0x74,  0x31, 0x57, 0x6d, 0x4a,   0x4f, 0x4c, 0x08, 0x00,  0x62, 0x65, 0x61, 0x74,
            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x01, 0x02, 0x00, 0x29,  0x00, 0x00, 0x00, 0x00,   0x00
    };

    /**
     * Keep track of which device has reported itself as the current tempo master.
     */
    private final AtomicReference<DeviceUpdate> tempoMaster = new AtomicReference<>();

    /**
     * Check which device is the current tempo master, returning the {@link DeviceUpdate} packet in which it
     * reported itself to be master. If there is no current tempo master returns {@code null}. Note that when
     * we are acting as tempo master ourselves in order to control player tempo and beat alignment, this will
     * also have a {@code null} value, as there is no real player that is acting as master; we will instead
     * send tempo and beat updates ourselves.
     *
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

        deviceNumberDefenseBytes[0x24] = keepAliveBytes[DEVICE_NUMBER_OFFSET];
        System.arraycopy(matchedAddress.getAddress().getAddress(), 0, deviceNumberDefenseBytes, 0x25, 4);
        try {
            DatagramPacket defense = new DatagramPacket(deviceNumberDefenseBytes, deviceNumberDefenseBytes.length,
                    invaderAddress, DeviceFinder.ANNOUNCEMENT_PORT);
            logger.info("Sending device number defense packet to invader at address {}, port {}", defense.getAddress().getHostAddress(), defense.getPort());
            currentSocket.send(defense);
        } catch (Exception e) {
            logger.error("Unable to send device defense packet.", e);
        }
    }

    /**
     * Implement the device-number claim protocol described in the
     * <a href="https://djl-analysis.deepsymmetry.org/djl-analysis/startup.html#cdj-startup">protocol analysis</a>.
     *
     * @return true iff a device number was successfully established and startup can proceed
     */
    private boolean claimDeviceNumber() {
        // Set up our state trackers for device assignment negotiation.
        claimRejected.set(false);
        mixerAssigned.set(0);

        // Send the initial series of three "coming online" packets.
        Arrays.fill(helloBytes, DEVICE_NAME_OFFSET, DEVICE_NAME_LENGTH, (byte)0);
        System.arraycopy(getDeviceName().getBytes(), 0, helloBytes, DEVICE_NAME_OFFSET, getDeviceName().getBytes().length);
        for (int i = 1; i <= 3; i++) {
            try {
                logger.debug("Sending hello packet {}", i);
                DatagramPacket announcement = new DatagramPacket(helloBytes, helloBytes.length,
                        broadcastAddress.get(), DeviceFinder.ANNOUNCEMENT_PORT);
                socket.get().send(announcement);
                Thread.sleep(300);
            } catch (Exception e) {
                logger.warn("Unable to send hello packet to network, failing to go online.", e);
                return false;
            }
        }

        // Establish the device number we want to claim; if zero that means we will try to self-assign.
        claimingNumber.set(getDeviceNumber());
        boolean claimed = false;  // Indicates we have successfully claimed a number and can be done.

        selfAssignLoop:
        while (!claimed) {
            // If we are supposed to self-assign a number, find the next one we can try.
            if (getDeviceNumber() == 0 && !selfAssignDeviceNumber()) {
                // There are no addresses left for us to try, give up and report failure.
                claimingNumber.set(0);
                return false;
            }

            // Send the series of three initial device number claim packets, unless we are interrupted by a defense
            // or a mixer assigning us a specific number.
            Arrays.fill(claimStage1bytes, DEVICE_NAME_OFFSET, DEVICE_NAME_LENGTH, (byte)0);
            System.arraycopy(getDeviceName().getBytes(), 0, claimStage1bytes, DEVICE_NAME_OFFSET, getDeviceName().getBytes().length);
            System.arraycopy(keepAliveBytes, MAC_ADDRESS_OFFSET, claimStage1bytes, 0x26, 6);
            for (int i = 1; i <= 3 && mixerAssigned.get() == 0; i++) {
                claimStage1bytes[0x24] = (byte)i;  // The packet counter.
                try {
                    logger.debug("Sending claim stage 1 packet {}", i);
                    DatagramPacket announcement = new DatagramPacket(claimStage1bytes, claimStage1bytes.length,
                            broadcastAddress.get(), DeviceFinder.ANNOUNCEMENT_PORT);
                    socket.get().send(announcement);
                    //noinspection BusyWait
                    Thread.sleep(300);
                } catch (Exception e) {
                    logger.warn("Unable to send device number claim stage 1 packet to network, failing to go online.", e);
                    claimingNumber.set(0);
                    return false;
                }
                if 

… truncated — see the raw .jsonl for the full output.

    }

    /**
     * Used to construct the keep-alive packet we broadcast in order to participate in the DJ Link network.
     * Some of these bytes are fixed, some get replaced by things like our device name and number, MAC address,
     * and IP address, as described in the
     * <a href="https://djl-analysis.deepsymmetry.org/djl-analysis/startup.html#cdj-keep-alive">Packet Analysis document</a>.
     */
    private static final byte[] keepAliveBytes = {
            0x51, 0x73, 0x70, 0x74,  0x31, 0x57, 0x6d, 0x4a,   0x4f, 0x4c, 0x06, 0x00,  0x62, 0x65, 0x61, 0x74,
            0x2d, 0x6c, 0x69, 0x6e,  0x6b, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x01, 0x02, 0x00, 0x36,  0x00, 0x01, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x02, 0x00, 0x00, 0x00,  0x01, 0x64
    };

    /**
     * The location of the device name in the announcement packet.
=== offsets & self-assign ===
48:    public static final int MAC_ADDRESS_OFFSET = 38;
259:    public static final int DEVICE_NAME_OFFSET = 0x0c;
265:    public static final int DEVICE_NAME_LENGTH = 0x14;
271:    public static final int DEVICE_NUMBER_OFFSET = 0x24;
---
619:    private boolean selfAssignDeviceNumber() {
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

hello     len=38 (0x26)  "5173707431576d4a4f4c0a00626561742d6c696e6b0000000000000000000000010400260140"
claim1    len=44 (0x2c)  "5173707431576d4a4f4c0000626561742d6c696e6b00000000000000000000000103002c0d01000000000000"
claim2    len=50 (0x32)  "5173707431576d4a4f4c0200626561742d6c696e6b000000000000000000000001030032000000000000000000000d000100"
claim3    len=38 (0x26)  "5173707431576d4a4f4c0400626561742d6c696e6b0000000000000000000000010300260d00"
keepalive len=54 (0x36)  "5173707431576d4a4f4c0600626561742d6c696e6b000000000000000000000001020036000100000000000000000000020000000164"

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce.go (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/net.go has been updated successfully. (file state is current in your context — no need to Read it back)

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce_test.go (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/capture/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

---TEST---
ok  	github.com/nzoschke/deadca7/link	0.216s
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]

online as "deadca7" device 5
captured 403 packets to testdata/status.jsonl
---SUMMARY---
192.168.0.160   port=50000 type=0x00 count=   3 lens=[44]
192.168.0.160   port=50000 type=0x02 count=   3 lens=[50]
192.168.0.160   port=50000 type=0x04 count=   3 lens=[38]
192.168.0.160   port=50000 type=0x06 count=   6 lens=[54]
192.168.0.160   port=50000 type=0x0a count=   3 lens=[38]
192.168.0.192   port=50000 type=0x06 count=   4 lens=[54]
192.168.0.192   port=50001 type=0x0b count= 273 lens=[60]
192.168.0.192   port=50002 type=0x0a count=  49 lens=[1116]
192.168.0.192   port=50002 type=0x40 count=   5 lens=[38]
192.168.0.193   port=50000 type=0x05 count=   3 lens=[38]
192.168.0.193   port=50000 type=0x06 count=   6 lens=[54]
192.168.0.193   port=50001 type=0x03 count=  39 lens=[53]
192.168.0.193   port=50001 type=0x04 count=   6 lens=[100]

run 1: 0x0a status packets = 24
run 2: 0x0a status packets = 32

19	read together with the port.
20	
21	### Discovery / keep-alive — port 50000
22	- [x] keep-alive (type 0x06): name, device #, IP, MAC — `testdata/devices.jsonl`
23	      covers CDJ-3000 (device 3) and DJM-V10 (device 33); name at 0x0c
24	- [ ] mixer/gateway packet seen on 50002 (type 0x40, "NXS-GW") — identify & decode
25	- [ ] full announce/channel-negotiation handshake (claim device # 1-4)
26	- [ ] virtual CDJ Announce + KeepAlive sender (prereq for all active flows)
27	
28	### Beat sync — port 50001
29	- [x] beat packet (type 0x28): BPM, beat-in-bar, pitch — `testdata/beats.jsonl`
30	      (name@0x0b; bpm@0x5a centi; beat@0x5c; pitch@0x55 3-byte, 0x100000=100%)
31	- [ ] next/prev beat-timing distances (six 4-byte BE values from ~0x24)
32	- [ ] mixer type 0x03 (~3/s from DJM-V10, name at 0x0b not 0x0c) — identify & decode
33	- [ ] capture across a tempo change and a loaded vs. stopped deck
34	
35	### Status — port 50002
36	- NOTE: passively only the CDJ's low-rate type 0x40 ("NXS-GW", ~0.5/s) appears.
37	  Full 0x0a status is NOT broadcast — it requires announcing a virtual CDJ first.
38	- [ ] CDJ status (type 0x0a): play state, BPM, pitch, on-air, master, sync
39	- [ ] loaded-track fields: track ID, source player, source slot (SD/USB)
40	- [ ] mixer status (DJM) if present
41	- [ ] CDJ type 0x40 on 50002 — identify & decode
42	- [ ] capture scenarios: idle, track loaded, playing, two-deck, on-air toggle
43	
44	## crate-digger — rekordbox database (over NFS)
45	
46	Reached only after the virtual CDJ announces and a deck reports a loaded track.
47	
48	- [ ] RPC portmap (port 111) — GETPORT for mount + nfs
49	- [ ] MOUNT — mount the media slot, obtain root file handle
50	- [ ] NFS — LOOKUP + READ `PIONEER/rekordbox/export.pdb`
51	- [ ] PDB parse: tables (tracks, artists, albums, artwork, playlists)
52	- [ ] ANLZ parse: `.DAT`/`.EXT` (beat grid, cue points, waveforms)
53	- [ ] metadata-by-track-ID resolved against captured PDB
54	

     403 testdata/status.jsonl

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

     * The number of milliseconds for which the {@link DeviceFinder} needs to have been watching the network in order
     * for us to be confident we can choose a device number that will not conflict.
     */
    private static final long SELF_ASSIGNMENT_WATCH_PERIOD = 4000;

    /**
     * <p>Try to choose a device number, which we have not seen on the network. If we have already tried one, it must
     * have been defended, so increment to the next one we can try (we stop at 15). If we have not yet tried one,
     * pick the first appropriate one to try, honoring the value of {@link #useStandardPlayerNumber} to determine
     * if we start at 1 or 7. Set the number we are going to try next in {@link #claimingNumber}.</p>
     *
     * <p>Even though in theory we should be able to rely on the protocol to tell us if we are claiming a
     * number that belongs to another player, it turns out the XDJ-XZ is buggy and tells us to go ahead and
     * use whatever we were claiming, and further fails to defend the device numbers that it is using. So
     * we still need to make sure the {@link DeviceFinder} has been running long enough to see all devices
     * so we can avoid trying to claim a number that some other device is already using.</p>
     *
     * @return true if there was a number available for us to try claiming
     */
    private boolean selfAssignDeviceNumber() {
        long now = System.currentTimeMillis();
        final long started = DeviceFinder.getInstance().getFirstDeviceTime();
        while (now - started < SELF_ASSIGNMENT_WATCH_PERIOD) {
            final long sleepMillis = SELF_ASSIGNMENT_WATCH_PERIOD - (now - started);
            logger.debug("Not waited long enough for devices; sleeping for {}ms", sleepMillis);
            try {
                Thread.sleep(sleepMillis);  // Sleep until we hit the right time
            } catch (InterruptedException e) {
                logger.warn("Interrupted waiting to self-assign device number, giving up.");
                return false;
            }
            now = System.currentTimeMillis();
        }
        logger.debug("Self-assigning number {}ms after first device seen.", System.currentTimeMillis() - started);

        if (claimingNumber.get() == 0) {
            // We have not yet tried a number. If we are not supposed to use standard player numbers, make sure
            // the first one we try is 7 (to accommodate the CDJ-3000, which can use channels 5 and 6).
            if (!getUseStandardPlayerNumber()) {
                claimingNumber.set(6);
            }
        }

        // Record what numbers we have already seen, since there is no point trying one of them.
        Set<Integer> numbersUsed = new HashSet<>();
        for (DeviceAnnouncement device : DeviceFinder.getInstance().getCurrentDevices()) {
            numbersUsed.add(device.getDeviceNumber());
        }
        logger.debug("Player numbers seen on network: {}", numbersUsed);

        // Try next available player number less than mixers use.
        final int startingNumber = claimingNumber.get() + 1;
        for (int result = startingNumber; result < 16; result++) {
            if (!numbersUsed.contains(result)) {  // We found one that is not used, so we can use it
                claimingNumber.set(result);
                if (getUseStandardPlayerNumber() && (result > 4)) {
                    logger.warn("Unable to self-assign a standard player number, all are in use. Trying number {}.", result);
                }
                return true;
            }
        }
        logger.warn("Found no unused device numbers between {} and 15, giving up.", startingNumber);
        return false;
    }

    /**
     * Hold the network interfaces which match the address on which we found player traffic. Should only be one,
     * or we will likely receive duplicate packets, which will cause problematic behavior.
     */
    private List<NetworkInterface> matchingInterfaces = null;

    /**
    

… truncated — see the raw .jsonl for the full output.

348:    private static final byte[] assignmentRequestBytes = {
361:            0x01, 0x02, 0x00, 0x29,  0x00, 0x00, 0x00, 0x00,   0x00
705:    private final AtomicBoolean claimRejected = new AtomicBoolean(false);
710:    private final AtomicInteger mixerAssigned = new AtomicInteger(0);
719:    private void requestNumberFromMixer(InetAddress mixerAddress) {
727:        Arrays.fill(assignmentRequestBytes, DEVICE_NAME_OFFSET, DEVICE_NAME_LENGTH, (byte)0);
728:        System.arraycopy(getDeviceName().getBytes(), 0, assignmentRequestBytes, DEVICE_NAME_OFFSET, getDeviceName().getBytes().length);
729:        System.arraycopy(matchedAddress.getAddress().getAddress(), 0, assignmentRequestBytes, 0x24, 4);
730:        System.arraycopy(keepAliveBytes, MAC_ADDRESS_OFFSET, assignmentRequestBytes, 0x28, 6);
732:        assignmentRequestBytes[0x31] = (keepAliveBytes[DEVICE_NUMBER_OFFSET] == 0)? (byte)1 : (byte)2;  // The auto-assign flag.
733:        assignmentRequestBytes[0x2f] = 1;  // The packet counter.
735:            DatagramPacket announcement = new DatagramPacket(assignmentRequestBytes, assignmentRequestBytes.length,
780:        claimRejected.set(false);
781:        mixerAssigned.set(0);
817:            for (int i = 1; i <= 3 && mixerAssigned.get() == 0; i++) {
831:                if (claimRejected.get()) {  // Some other player is defending the number we tried to claim.
849:            for (int i = 1; i <= 3 && mixerAssigned.get() == 0; i++) {
863:                if (claimRejected.get()) {  // Some other player is defending the number we tried to claim.
874:            final int assigned = mixerAssigned.getAndSet(0);
884:            for (int i = 1; i <= 3 && mixerAssigned.get() == 0; i++) {
898:                if (claimRejected.get()) {  // Some other player is defending the number we tried to claim.
912:        mixerAssigned.set(0);
2006:                    if (number >= 0x29 && number < 0x30) { // We can see rekordbox mobile, this will work too.
2883:    private void handleDeviceClaimPacket(DatagramPacket packet, int deviceOffset) {
2904:            handleDeviceClaimPacket(packet, 0x2e);
2906:            handleDeviceClaimPacket(packet, 0x24);
2910:                requestNumberFromMixer(packet.getAddress());
2915:            mixerAssigned.set(packet.getData()[0x24]);
2916:            if (mixerAssigned.get() == 0) {
2919:                logger.info("Mixer at address {} told us to use device number {}", packet.getAddress().getHostAddress(), mixerAssigned.get());
2922:            mixerAssigned.set(claimingNumber.get());
2930:                claimRejected.set(true);
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

    private void handleDeviceClaimPacket(DatagramPacket packet, int deviceOffset) {
        if (packet.getData().length < deviceOffset + 1) {
            logger.warn("Ignoring too-short device claim packet.");
            return;
        }
        if (isRunning() && getDeviceNumber() == packet.getData()[deviceOffset]) {
            defendDeviceNumber(packet.getAddress());
        }
    }

    /**
     * The {@link DeviceFinder} delegates packets it doesn't know how to deal with to us using this method, because
     * they relate to claiming or defending device numbers, which is our responsibility.
     *
     * @param kind the kind of packet that was received
     * @param packet the actual bytes of the packet
     */
    void handleSpecialAnnouncementPacket(Util.PacketType kind, DatagramPacket packet) {
        if (kind == Util.PacketType.DEVICE_NUMBER_STAGE_1) {
            logger.debug("Received device number claim stage 1 packet.");
        } else if (kind == Util.PacketType.DEVICE_NUMBER_STAGE_2) {
            handleDeviceClaimPacket(packet, 0x2e);
        } else if (kind == Util.PacketType.DEVICE_NUMBER_STAGE_3) {
            handleDeviceClaimPacket(packet, 0x24);
        } else if (kind == Util.PacketType.DEVICE_NUMBER_WILL_ASSIGN) {
            logger.debug("The mixer at address {} wants to assign us a specific device number.", packet.getAddress().getHostAddress());
            if (claimingNumber.get() != 0) {
                requestNumberFromMixer(packet.getAddress());
            } else {
                logger.warn("Ignoring mixer device number assignment offer; we are not claiming a device number!");
            }
        } else if (kind == Util.PacketType.DEVICE_NUMBER_ASSIGN) {
            mixerAssigned.set(packet.getData()[0x24]);
            if (mixerAssigned.get() == 0) {
                logger.debug("Mixer at address {} told us to use any device.", packet.getAddress().getHostAddress());
            } else {
                logger.info("Mixer at address {} told us to use device number {}", packet.getAddress().getHostAddress(), mixerAssigned.get());
            }
        } else if (kind == Util.PacketType.DEVICE_NUMBER_ASSIGNMENT_FINISHED) {
            mixerAssigned.set(claimingNumber.get());
            logger.info("Mixer confirmed device assignment.");
        } else if (kind == Util.PacketType.DEVICE_NUMBER_IN_USE) {
            final int defendedDevice = packet.getData()[0x24];
            if (defendedDevice == 0) {
                logger.warn("Ignoring unexplained attempt to defend device 0.");
            } else if (defendedDevice == claimingNumber.get()) {
                logger.warn("Another device is defending device number {}, so we can't use it.", defendedDevice);
                claimRejected.set(true);
            } else if (isRunning()) {
                if (defendedDevice == getDeviceNumber()) {
                    logger.warn("Another device has claimed it owns our device number, shutting down.");
                    stop();
                } else if (defendedDevice == 25) {
=== packet dispatch around 2900 ===
        }
    }

    /**
     * The {@link DeviceFinder} delegates packets it doesn't know how to deal with to us using this method, because
     * they relate to claiming or defending device numbers, which is our responsibility.
     *
     * @param kind the kind of packet that was received
     * @param packet the actual bytes of the packet
     */
    void handleSpecialAnnouncementPacket(Util.PacketType kind, DatagramPacket packet) {
        if (kind == Util.PacketType.DEVICE_NUMBER_STAGE_1) {
            logger.debug("Received device number claim stage 1 packet.");
        } else if (kind == Util.PacketType.DEVICE_NUMBER_STAGE_2) {
            handleDeviceClaimPacket(packet, 0x2e);
        } else if (kind == Util.PacketType.DEVICE_NUMBER_STAGE_3) {
            handleDeviceClaimPacket(packet, 0x24);
        } else if (kind == Util.PacketType.DEVICE_NUMBER_WILL_ASSIGN) {
            log

… truncated — see the raw .jsonl for the full output.

64:        FADER_START_COMMAND(0x02, "Fader Start", BeatFinder.BEAT_PORT),
69:        CHANNELS_ON_AIR(0x03, "Channels On Air", BeatFinder.BEAT_PORT),
74:        MEDIA_QUERY(0x05, "Media Query", VirtualCdj.UPDATE_PORT),
79:        MEDIA_RESPONSE(0x06, "Media Response", VirtualCdj.UPDATE_PORT),
85:        DEVICE_HELLO(0x0a, "Device Hello", DeviceFinder.ANNOUNCEMENT_PORT),
99:        DEVICE_NUMBER_STAGE_1(0x00, "Device Number Claim Stage 1", DeviceFinder.ANNOUNCEMENT_PORT),
106:        DEVICE_NUMBER_WILL_ASSIGN(0x01, "Device Number Will Be Assigned", DeviceFinder.ANNOUNCEMENT_PORT),
111:        DEVICE_NUMBER_STAGE_2(0x02, "Device Number Claim Stage 2", DeviceFinder.ANNOUNCEMENT_PORT),
117:        DEVICE_NUMBER_ASSIGN(0x03, "Device Number Assignment", DeviceFinder.ANNOUNCEMENT_PORT),
123:        DEVICE_NUMBER_STAGE_3(0x04, "Device Number Claim Stage 3", DeviceFinder.ANNOUNCEMENT_PORT),
129:        DEVICE_NUMBER_ASSIGNMENT_FINISHED(0x05, "Device Number Assignment Finished", DeviceFinder.ANNOUNCEMENT_PORT),
134:        DEVICE_KEEP_ALIVE(0x06, "Device Keep-Alive", DeviceFinder.ANNOUNCEMENT_PORT),
139:        DEVICE_NUMBER_IN_USE(0x08, "Device Number In Use", DeviceFinder.ANNOUNCEMENT_PORT),
145:        CDJ_STATUS(0x0a, "CDJ Status", VirtualCdj.UPDATE_PORT),
184:        PRECISE_POSITION(0x0b, "Precise Position", BeatFinder.BEAT_PORT),
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

assignRequest  len=50 (0x32)  "5173707431576d4a4f4c0201626561742d6c696e6b0000000000000000000000010200320000000000000000000000000100"
defense        len=41 (0x29)  "5173707431576d4a4f4c0800626561742d6c696e6b0000000000000000000000010200290000000000"

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/capture/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/capture/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/capture/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce_test.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce_test.go has been updated successfully. (file state is current in your context — no need to Read it back)

---TEST---
ok  	github.com/nzoschke/deadca7/link	0.223s
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]

=== fixed device 5 ===
virtual CDJ "deadca7" ran as device 5
captured 298 packets to /tmp/n5.jsonl
=== auto-assign device 0 ===
virtual CDJ "deadca7" ran as device 5
captured 467 packets to /tmp/n0.jsonl
n5: 0x0a status = 35
n0: 0x0a status = 60

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/capture/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

ok  	github.com/nzoschke/deadca7/link	0.224s
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]

online as device 5
virtual CDJ "deadca7" ran as device 5
captured 135 packets to /tmp/base.jsonl

Command running in background with ID: b89tezv8z. Output is being written to: /private/tmp/claude-501/-Users-noah-conductor-workspaces-deadca7-san-diego/5e143c63-1d6b-4233-91af-bb63e39e8beb/tasks/b89tezv8z.output. You will be notified when it completes. To check interim output, use Read on that file path.

=== event log (stderr) ===
   1 EXIT=0
   1 captured 1887 packets to testdata/defense_out.jsonl
   1 online as device 4
   1 virtual CDJ "deadca7" ran as device 4
=== devices seen on 50000 keepalives (0x06) ===
  192.168.0.193   device=33 keepalives=22
  192.168.0.192   device=3 keepalives=21
  192.168.0.160   device=4 keepalives=28
=== claim packets seen (who tried to claim what) ===
  192.168.0.160   type=0x00 num=1 count=1
  192.168.0.160   type=0x00 num=2 count=1
  192.168.0.160   type=0x00 num=3 count=1
  192.168.0.160   type=0x02 num=4 count=3
  192.168.0.160   type=0x04 num=4 count=1

Command running in background with ID: bdasqjar0. Output is being written to: /private/tmp/claude-501/-Users-noah-conductor-workspaces-deadca7-san-diego/5e143c63-1d6b-4233-91af-bb63e39e8beb/tasks/bdasqjar0.output. You will be notified when it completes. To check interim output, use Read on that file path.

cleared any running capture

Command running in background with ID: bucsz0z8x. Output is being written to: /private/tmp/claude-501/-Users-noah-conductor-workspaces-deadca7-san-diego/5e143c63-1d6b-4233-91af-bb63e39e8beb/tasks/bucsz0z8x.output. You will be notified when it completes. To check interim output, use Read on that file path.

defending events so far: 28
--- sample defending lines ---
defending device 4 against 192.168.0.194
defending device 4 against 192.168.0.194
defending device 4 against 192.168.0.194
defending device 4 against 192.168.0.194
defending device 4 against 192.168.0.194

=== our events ===
   1 captured 3758 packets to testdata/defense_out.jsonl
  28 defending device 4 against 192.168.0.194
   1 online as device 4
   1 virtual CDJ "deadca7" ran as device 4
=== what 192.168.0.194 (second CDJ) sent on 50000 ===
  type=0x0a num= count=32
  type=0x02 num=25 count=3
  type=0x04 num=25 count=1
  type=0x06 num=25 count=28
  type=0x00 num= count=29
  type=0x02 num=4 count=28
  type=0x04 num=0 count=28
  type=0x06 num=4 count=10
=== did .194 ever hold device 4 via keepalive? ===
  .194 keepalive device numbers: [4, 25]

Exit code 1
=== timeline of .194 keepalive device number (gets/loses 4) ===
  File "<string>", line 8
    print(f"  t={p[\"ts\"]%100000:>5}ms  .194 now claims device {d[0x24]}"); prev=d[0x24]
                                                                          ^
SyntaxError: f-string expression part cannot include a backslash
=== extract real claim2/claim3 packets from .194 for a fixture ===
  File "<string>", line 16
    print(f"  type=0x{d[0x0a]:02x} claimed-device={num} len={p[\"len\"]}")
                                                                         ^
SyntaxError: f-string expression part cannot include a backslash

=== timeline of .194 keepalive device number ===
  t=21190ms  .194 now claims device 25
  t=27026ms  .194 now claims device 4
  t=28561ms  .194 now claims device 25
  t=34094ms  .194 now claims device 4
  t=34706ms  .194 now claims device 25
  t=40852ms  .194 now claims device 4
  t=42693ms  .194 now claims device 25
  t=47916ms  .194 now claims device 4
  t=48837ms  .194 now claims device 25
  t=54674ms  .194 now claims device 4
  t=54674ms  .194 now claims device 25
  t=61434ms  .194 now claims device 4
  t=62968ms  .194 now claims device 25
  t=70649ms  .194 now claims device 4
  t=70958ms  .194 now claims device 25
  t=72799ms  .194 now claims device 4
  t=72801ms  .194 now claims device 25
  t=79557ms  .194 now claims device 4
=== wrote 4 representative claim packets to testdata/claim.jsonl ===
  type=0x02 claimed-device=25 len=50
  type=0x04 claimed-device=25 len=38
  type=0x02 claimed-device=4 len=50
  type=0x04 claimed-device=0 len=38

claim.jsonl: 2 real claim-stage-2 packets, devices [4, 25]
total 536
drwxr-xr-x@  6 noah  staff     192 Jun  7 09:36 .
drwxr-xr-x@ 14 noah  staff     448 Jun  7 09:29 ..
-rw-r--r--@  1 noah  staff   60144 Jun  7 09:01 beats.jsonl
-rw-r--r--@  1 noah  staff     362 Jun  7 09:36 claim.jsonl
-rw-r--r--@  1 noah  staff    6790 Jun  7 08:57 devices.jsonl
-rw-r--r--@  1 noah  staff  183520 Jun  7 09:11 status.jsonl

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet_test.go has been updated successfully. (file state is current in your context — no need to Read it back)

---TEST---
ok  	github.com/nzoschke/deadca7/link	0.215s
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

0x0a CDJ status packets in testdata/status.jsonl:
  src=192.168.0.192   name=CDJ-3000   len=1116 count=49

818:        if (handingMasterToDevice == 0xff) {
951:        return (packetBytes[LOCAL_CD_STATE] != 0x1e) && (packetBytes[LOCAL_CD_STATE] != 0x11);
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

28:    public static final int STATUS_FLAGS = 0x89;
40:    public static final int MASTER_HAND_OFF = 0x9f;
47:    public static final int BPM_SYNC_FLAG = 0x02;
56:    public static final int ON_AIR_FLAG = 0x08;
63:    public static final int SYNCED_FLAG = 0x10;
70:    public static final int MASTER_FLAG = 0x20;
77:    public static final int PLAYING_FLAG = 0x40;
83:    public static final int LOCAL_CD_STATE = 0x37;
90:    public static final int LOCAL_USB_STATE = 0x6F;
96:    public static final int LOCAL_SD_STATE = 0x73;
629:    public static final int MINIMUM_PACKET_SIZE = 0xcc;
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

102:    private final int trackSourcePlayer;
111:    public int getTrackSourcePlayer() { return trackSourcePlayer; }
176:    private final TrackSourceSlot trackSourceSlot;
184:    public TrackSourceSlot getTrackSourceSlot() { return trackSourceSlot; }
243:    private final TrackType trackType;
252:    public TrackType getTrackType() { return trackType; }
258:    private final int rekordboxId;
269:    public int getRekordboxId() { return rekordboxId; }
539:        TrackSourceSlot result = TRACK_SOURCE_SLOT_MAP.get(packetBytes[0x29]);
552:        TrackType result = TRACK_TYPE_MAP.get(packetBytes[0x2a]);
565:        PlayState1 result = PLAY_STATE_1_MAP.get(packetBytes[0x7b]);
578:        switch (packetBytes[0x8b]) {
600:        PlayState3 result = PLAY_STATE_3_MAP.get(packetBytes[0x9d]);
666:        final int payloadLength = (int)Util.bytesToNumber(packetBytes, 0x22, 2);
679:        trackType = findTrackType();
680:        int maybeRekordboxId = (int)Util.bytesToNumber(packetBytes, 0x2c, 4);
681:        pitch = (int)Util.bytesToNumber(packetBytes, 0x8d, 3);
682:        bpm = (int)Util.bytesToNumber(packetBytes, 0x92, 2);
689:        final byte trackSourceByte = packetBytes[0x28];
707:            trackSourcePlayer = sourcePlayer;
708:            trackSourceSlot = TrackSourceSlot.USB_SLOT;
712:            trackSourcePlayer = trackSourceByte;
713:            trackSourceSlot = findTrackSourceSlot();
716:        rekordboxId = maybeRekordboxId;
758:            case 2: return (int)Util.bytesToNumber(packetBytes, 153, 3);
759:            case 3: return (int)Util.bytesToNumber(packetBytes, 193, 3);
760:            case 4: return (int)Util.bytesToNumber(packetBytes, 197, 3);
790:        return packetBytes[0xa6];
976:        return (int)Util.bytesToNumber(packetBytes, 0x46, 2);
1086:        return (packetBytes[0x75] != 0);
1096:        return packetBytes[0x27] != 0;
1107:        return (int)Util.bytesToNumber(packetBytes, 0x32, 2);
1118:        return (int)Util.bytesToNumber(packetBytes, 0x84, 4);
1133:        long result = Util.bytesToNumber(packetBytes, 0xa0, 4);
1154:        return (int)Util.bytesToNumber(packetBytes, 0xa4, 2);
1201:        return Util.bytesToNumber(packetBytes, 0xc8, 4);
1224:            return (int)Util.bytesToNumber(packetBytes, 0x1c8, 2);
1239:            return Util.bytesToNumber(packetBytes, 0x1b6, 4) * 65536 / 1000;
1253:            return Util.bytesToNumber(packetBytes, 0x1be, 4) * 65536 / 1000;
1263:                ", rekordboxId:" + getRekordboxId() + ", from player:" + getTrackSourcePlayer() +
=== DeviceUpdate base getters ===
1:package org.deepsymmetry.beatlink;
4:import org.deepsymmetry.beatlink.data.OpusProvider;
127:     * beat numbers will not be available, so the {@link org.deepsymmetry.beatlink.data.TimeFinder}
166:     * Get the device pitch at the time of the update. This is an integer ranging from 0 to 2097152, which corresponds
168:     * value can be obtained by passing the pitch to {@link Util#pitchToPercentage(long)}, and the corresponding
169:     * fractional scaling value by passing it to {@link Util#pitchToMultiplier(long)}. Mixers always report a pitch
172:     * @return the raw effective device pitch at the time of the update
178:     * running at 120.5 BPM would be represented by the value 12050. Mixers always report a pitch of +0%, so tempo
192:     *          that is needed to find the latest status update from the device which sent the beat packet.
201:     *          that is needed to find the latest status update from the device which sent the beat packet.
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

=== slot map ===
=== type map ===
=== device number offset ===
20:    public static final int DEVICE_NUMBER_OFFSET = 0x21;
88:            deviceNumber = Util.translateOpusPlayerNumbers(packetBytes[deviceNumberOffset]);
90:            deviceNumber = Util.unsign(packetBytes[deviceNumberOffset]);
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

=== slot enum ===
=== type enum ===
552:        TrackType result = TRACK_TYPE_MAP.get(packetBytes[0x2a]);
=== enum defs ===
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

        NO_TRACK   (0),
        CD_SLOT    (1),
        SD_SLOT    (2),
        USB_SLOT   (3),
        COLLECTION (4),
        USB_2_SLOT (7),
        UNKNOWN    (-1);
=== TrackType ===
        NO_TRACK         (0),
        REKORDBOX        (1),
        UNANALYZED       (2),
        CD_DIGITAL_AUDIO (5),
        UNKNOWN          (-1);
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

status packets: 49
dev=3 track=1 src=p3/sd type=rekordbox bpm=100.00 pitch=1051197 beat=49 bib=3 flags[master,onair]
dev=3 track=1 src=p3/sd type=rekordbox bpm=100.00 pitch=1051197 beat=49 bib=3 flags[master,onair]
dev=3 track=1 src=p3/sd type=rekordbox bpm=100.00 pitch=1051197 beat=49 bib=3 flags[master,onair]
dev=3 track=1 src=p3/sd type=rekordbox bpm=100.00 pitch=1051197 beat=49 bib=3 flags[master,onair]
dev=3 track=1 src=p3/sd type=rekordbox bpm=100.00 pitch=1051197 beat=49 bib=3 flags[master,onair]

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/status.go (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet_test.go has been updated successfully. (file state is current in your context — no need to Read it back)

---TEST---
ok  	github.com/nzoschke/deadca7/link	0.241s
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

=== pkg/link/nfs ===
  nfs.go              8783
  reader.go           2031
=== pkg/link/pdb ===
  pdb.go              3973
  rekordbox_pdb.go   78476
=== pkg/link/anlz ===
  RekordboxAnlz.js   36011
  anlz.go              808
  anlz_test.go       16551
  main.js            1025205
  main.ts             1595
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

package nfs

import (
	"bytes"
	"encoding/binary"
	"fmt"
	"io/fs"
	"log/slog"
	"net"
	"os"
	"time"
	"unicode/utf16"

	"github.com/pkg/errors"
)

type Attr struct {
	Type    uint32
	Mode    uint32
	NLink   uint32
	UID     uint32
	GID     uint32
	Size    uint32
	BlkSize uint32
	Rdev    uint32
	Blocks  uint32
	FSId    uint32
	FileId  uint32
	ATime   Time
	MTime   Time
	CTime   Time
}

type Client struct {
	addr *net.UDPAddr
	conn *net.UDPConn
	xid  uint32
}

type FileHandle [32]byte

type Mount struct {
	Client *Client
	FH     *FileHandle
}

type Header struct {
	XID      uint32
	MsgType  uint32
	RPCVers  uint32
	Program  uint32
	Version  uint32
	Proc     uint32
	AuthType uint32
	AuthLen  uint32
	VerfType uint32
	VerfLen  uint32
}

type Time struct {
	Seconds uint32
	USec    uint32
}

const (
	NFS_PROGRAM   = 100003
	NFS_VERSION   = 2
	MOUNT_PROGRAM = 100005
	MOUNT_VERSION = 1

	NFSPROC_NULL    = 0
	NFSPROC_GETATTR = 1
	NFSPROC_LOOKUP  = 4
	NFSPROC_READ    = 6

	MOUNTPROC_NULL = 0
	MOUNTPROC_MNT  = 1
	MOUNTPROC_UMNT = 3

	RPC_CALL  = 0
	RPC_REPLY = 1

	AUTH_NULL = 0

	NFNON = 0
	NFREG = 1
	NFDIR = 2
)

var ERRNoMount = errors.New("no mount response")

func New(address string) (*Client, error) {
	addr, err := net.ResolveUDPAddr("udp", address)
	if err != nil {
		return nil, errors.WithStack(err)
	}

	conn, err := net.DialUDP("udp", nil, addr)
	if err != nil {
		return nil, err
	}

	return &Client{
		addr: addr,
		conn: conn,
		xid:  uint32(time.Now().Unix()),
	}, nil
}

func (c *Client) Close() error {
	return c.conn.Close()
}

func (c *Client) nextXID() uint32 {
	c.xid++
	return c.xid
}

func (c *Client) Attr(fh *FileHandle) (*Attr, error) {
	buf := new(bytes.Buffer)
	buf.Write(fh[:])

	res, err := c.rpc(NFS_PROGRAM, NFS_VERSION, NFSPROC_GETATTR, buf.Bytes())
	if err != nil {
		return nil, errors.WithStack(err)
	}

	if len(res) < 24+4 {
		return nil, fmt.Errorf("getattr response too short")
	}

	status := binary.BigEndian.Uint32(res[24:28])
	if status != 0 {
		return nil, fmt.Errorf("getattr failed with status %d", status)
	}

	// Parse attributes
	data := res[28:]
	if len(data) < 68 {
		return nil, fmt.Errorf("attribute data too short")
	}

	attr := &Attr{}
	r := bytes.NewReader(data)

	binary.Read(r, binary.BigEndian, &attr.Type)
	binary.Read(r, binary.BigEndian, &attr.Mode)
	binary.Read(r, binary.BigEndian, &attr.NLink)
	binary.Read(r, binary.BigEndian, &attr.UID)
	binary.Read(r, binary.BigEndian, &attr.GID)
	binary.Read(r, binary.BigEndian, &attr.Size)
	binary.Read(r, binary.BigEndian, &attr.BlkSize)
	binary.Read(r, binary.BigEndian, &attr.Rdev)
	binary.Read(r, binary.BigEndian, &attr.Blocks)
	binary.Read(r, binary.BigEndian, &attr.FSId)
	binary.Read(r, binary.BigEndian, &attr.FileId)
	binary.Read(r, binary.BigEndian, &attr.ATime.Seconds)
	binary.Read(r, binary.BigEndian, &attr.ATime.USec)
	binary.Read(r, binary.BigEndian, &attr.MTime.Seconds)
	binary.Read(r, binary.BigEndian, &attr.MTime.USec)
	binary.Read(r, binary.BigEndian, &attr.CTime.Seconds)
	binary.Read(r, binary.BigEndian, &attr.CTime.USec)

	return attr, nil
}

func (c *Client) Copy(dir *FileHandle, src string, dest string) error {
	bs, err := c.CopyBytes(dir, src)
	if err != nil {
		return errors.WithStack(err)
	}

	if err := os.WriteFile(dest, bs, 0644); err != nil {
		return errors.WithStack(err)
	}

	return nil
}

func (c *Client) CopyBytes(dir *FileHandle, src string) ([]byte, error) {
	f, attr, err := c.Lookup(dir, src)
	if err != nil {
		return nil, errors.WithStack(err)
	}

	if attr.Type != NFREG || attr.Size <= 0 {
		return nil, errors.Errorf("invalid file type %d or size %d", attr.Type, attr.Size)
	}

	bs, err := c.ReadFile(f, attr.Size)
	if err != nil {
		return nil, errors.WithStack(err)
	}

	slog.Debug("nfs.CopyBytes", "ip", c.addr.IP.String(), "size", attr.Size, "src", src)

	return bs, nil
}

// Pioneer paths are UTF-16LE
func utf16le(path string) []byte {
	p := utf16.Encode([]rune(path))
	bs := make([]byte, len(p)*2)
	for i, v := range p {
		bs[i*2] 

… truncated — see the raw .jsonl for the full output.

=== nfs/reader.go ===
package nfs

import (
	"io"
	"log/slog"

	"github.com/pkg/errors"
)

type reader struct {
	attr     *Attr
	client   *Client
	dir      *FileHandle
	fh       *FileHandle
	maxReads int
	offset   uint32
	reads    int
	src      string
}

// NewReader implements the ReadSeeker interface over NFS.
// If maxReads is non-zero, it returns an ErrUnexpectedEOF after max reads to guard against a poorly designed reader.
func (c *Client) NewReader(dir *FileHandle, src string, maxReads int) io.ReadSeeker {
	slog.Debug("nfs.NewReader", "ip", c.addr.IP.String(), "src", src)
	return &reader{
		client:   c,
		dir:      dir,
		maxReads: maxReads,
		src:      src,
	}
}

func (r *reader) Read(p []byte) (int, error) {
	if r.fh == nil {
		var err error
		r.fh, r.attr, err = r.client.Lookup(r.dir, r.src)
		if err != nil {
			return 0, errors.WithStack(err)
		}

		if r.attr.Type != NFREG {
			return 0, errors.Errorf("invalid file type %d", r.attr.Type)
		}
	}

	if r.offset >= r.attr.Size {
		return 0, io.EOF
	}

	if r.maxReads > 0 && r.reads >= r.maxReads {
		return 0, io.ErrUnexpectedEOF
	}

	bs, err := r.client.ReadRetry(r.fh, r.offset, uint32(len(p)), 5)
	if err != nil {
		return 0, errors.WithStack(err)
	}

	n := copy(p, bs)
	r.offset += uint32(n)
	r.reads += 1

	return n, nil
}

func (r *reader) Seek(offset int64, whence int) (int64, error) {
	if r.fh == nil {
		var err error
		r.fh, r.attr, err = r.client.Lookup(r.dir, r.src)
		if err != nil {
			return 0, errors.WithStack(err)
		}

		if r.attr.Type != NFREG {
			return 0, errors.Errorf("invalid file type %d", r.attr.Type)
		}
	}

	var o int64
	switch whence {
	case io.SeekStart:
		o = offset
	case io.SeekCurrent:
		o = int64(r.offset) + offset
	case io.SeekEnd:
		o = int64(r.attr.Size) + offset
	default:
		return 0, errors.Errorf("invalid whence value %d", whence)
	}

	if o < 0 {
		return 0, errors.New("negative offset not allowed")
	}
	// if o > int64(r.attr.Size) {
	// 	return 0, errors.New("offset beyond file size")
	// }

	r.offset = uint32(o)

	return o, nil
}
=== link/pdb.go (wrapper) ===
package link

import (
	"fmt"
	"log/slog"
	"net"
	"os"
	"path/filepath"

	"github.com/nzoschke/codon/pkg/link/nfs"
	"github.com/nzoschke/codon/pkg/link/pdb"
	"github.com/pkg/errors"
)

type PDBMnt struct {
	Mnt *nfs.Mount
	PDB *pdb.PDB
}

func PDB(ip net.IP, ds DeviceSlot) (PDBMnt, error) {
	c, err := nfs.New(fmt.Sprintf("%s:2049", ip))
	if err != nil {
		return PDBMnt{}, errors.WithStack(err)
	}

	path := ""
	switch ds.Slot {
	case SlotSD:
		path = "/B/"
	case SlotUSB:
		path = "/C/"
	default:
		return PDBMnt{}, errors.Errorf("invalid slot: %d", ds.Slot)
	}

	fh, err := c.MountRetry(path, 5)
	if err != nil {
		return PDBMnt{}, errors.WithStack(err)
	}

	mnt := &nfs.Mount{Client: c, FH: fh}

	// FIXME: disk cache
	f, err := os.CreateTemp("", "export-*.pdb")
	if err != nil {
		return PDBMnt{}, errors.WithStack(err)
	}
	defer f.Close()

	if err := mnt.Client.Copy(mnt.FH, "PIONEER/rekordbox/export.pdb", f.Name()); err != nil {
		return PDBMnt{}, errors.WithStack(err)
	}

	db, err := pdb.New(f.Name())
	if err != nil {
		return PDBMnt{}, errors.WithStack(err)
	}

	slog.Info("PDB", "ip", ip, "mnt", path, "dest", filepath.Base(f.Name()), "slot", ds, "tracks", len(db.Tracks))

	return PDBMnt{mnt, db}, nil
}
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/nfs/nfs.go (file state is current in your context — no need to Read it back)

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/fetch/main.go (file state is current in your context — no need to Read it back)

---FETCH export.pdb from CDJ-3000 SD---
wrote 184320 bytes to testdata/export.pdb
-rw-r--r--@ 1 noah  staff  184320 Jun  7 10:40 testdata/export.pdb
--- first bytes ---
00000000: 0000 0000 0010 0000 1400 0000 3700 0000  ............7...
00000010: 0400 0000 5800 0000 0000 0000 0000 0000  ....X...........
00000020: 3300 0000 0100 0000 0200 0000 0100 0000  3...............
00000030: 3000 0000 0300 0000 0400 0000 0200 0000  0...............

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

package pdb

import (
	"io"
	"os"
	"regexp"
	"strings"

	"github.com/kaitai-io/kaitai_struct_go_runtime/kaitai"
	"github.com/pkg/errors"
)

type PDB struct {
	Albums   map[uint32]Album
	Artists  map[uint32]Artist
	Artworks map[uint32]Artwork
	Tracks   map[uint32]Track

	db *RekordboxPdb
}

type Album struct {
	ID   uint32
	Name string
}

type Artist struct {
	ID   uint32
	Name string
}

type Artwork struct {
	File  string
	FileM string
	ID    uint32
}

type Track struct {
	Anlz string
	Art  string
	ArtM string
	Ext  string
	Ex2  string
	ID   uint32
	File string

	Album  string
	Artist string
	Title  string
	Year   int
}

var re = regexp.MustCompile(`(\.\w+)$`)

func New(path string) (*PDB, error) {
	f, err := os.Open(path)
	if err != nil {
		return nil, errors.WithStack(err)
	}

	db := NewRekordboxPdb(false)
	s := kaitai.NewStream(f)
	if err := db.Read(s, nil, db); err != nil {
		return nil, errors.WithStack(err)
	}

	pdb := &PDB{
		Albums:   map[uint32]Album{},
		Artists:  map[uint32]Artist{},
		Artworks: map[uint32]Artwork{},
		Tracks:   map[uint32]Track{},
		db:       db,
	}

	rows(db.Tables[RekordboxPdb_PageType__Albums], func(r RekordboxPdb_AlbumRow) error {
		n, err := r.Name()
		if err != nil {
			return errors.WithStack(err)
		}

		pdb.Albums[r.Id] = Album{
			ID:   r.Id,
			Name: str(n),
		}

		return nil
	})

	rows(db.Tables[RekordboxPdb_PageType__Artists], func(r RekordboxPdb_ArtistRow) error {
		n, err := r.Name()
		if err != nil {
			return errors.WithStack(err)
		}

		pdb.Artists[r.Id] = Artist{
			ID:   r.Id,
			Name: str(n),
		}

		return nil
	})

	rows(db.Tables[RekordboxPdb_PageType__Artwork], func(r RekordboxPdb_ArtworkRow) error {
		pdb.Artworks[r.Id] = Artwork{
			File:  str(r.Path),
			FileM: re.ReplaceAllString(str(r.Path), "_m$1"),
			ID:    r.Id,
		}

		return nil
	})

	rows(db.Tables[RekordboxPdb_PageType__Tracks], func(r RekordboxPdb_TrackRow) error {
		fp, err := r.FilePath()
		if err != nil {
			return errors.WithStack(err)
		}

		ap, err := r.AnalyzePath()
		if err != nil {
			return errors.WithStack(err)
		}

		t, err := r.Title()
		if err != nil {
			return errors.WithStack(err)
		}

		album := ""
		if al, ok := pdb.Albums[r.AlbumId]; ok {
			album = al.Name
		}

		artist := ""
		if ar, ok := pdb.Artists[r.ArtistId]; ok {
			artist = ar.Name
		}

		art := ""
		artm := ""
		if ar, ok := pdb.Artworks[r.ArtworkId]; ok {
			art = ar.File
			artm = ar.FileM
		}

		pdb.Tracks[r.Id] = Track{
			Anlz: str(ap),
			Art:  art,
			ArtM: artm,
			Ext:  strings.Replace(str(ap), ".DAT", ".EXT", 1),
			Ex2:  strings.Replace(str(ap), ".DAT", ".2EX", 1),
			ID:   r.Id,
			File: str(fp),

			Album:  album,
			Artist: artist,
			Title:  str(t),
			Year:   int(r.Year),
		}

		return nil
	})

	return pdb, nil
}

func rows[T any](t *RekordboxPdb_Table, cb func(row T) error) error {
	page, err := t.FirstPage.Body()
	if err != nil {
		return errors.WithStack(err)
	}

	for {
		page, err = page.NextPage.Body()
		if err != nil {
			if err == io.EOF {
				break
			}
			return errors.WithStack(err)
		}

		data, err := page.IsDataPage()
		if err != nil {
			return errors.WithStack(err)
		}
		if !data {
			continue
		}

		groups, err := page.RowGroups()
		if err != nil {
			return errors.WithStack(err)
		}

		for _, g := range groups {
			rows, err := g.Rows()
			if err != nil {
				return errors.WithStack(err)
			}

			for _, r := range rows {
				b, err := r.Body()
				if err != nil {
					if err == io.EOF {
						break
					}
					return errors.WithStack(err)
				}

				r, ok := b.(*T)
				if !ok {
					continue
				}

				if err := cb(*r); err != nil {
					return errors.WithStack(err)
				}
			}
		}
	}

	return nil
}

func str(s *RekordboxPdb_DeviceSqlString) string {
	switch st := s.Body.(type) {
	case *RekordboxPdb_DeviceSqlLongAscii:
		return st.Text
	case *RekordboxPdb_DeviceSqlLongUtf16le:
		return st.Text
	case *RekordboxPdb_DeviceSqlShortAscii:
		return st.Text
	default:
		return ""
	}
}
=== rekordbox_pdb.go head (

… truncated — see the raw .jsonl for the full output.

// Code generated by kaitai-struct-compiler from a .ksy source file. DO NOT EDIT.

package pdb
    3401 pdb/rekordbox_pdb.go
0

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/pdb/pdb.go (file state is current in your context — no need to Read it back)

go: finding module for package github.com/kaitai-io/kaitai_struct_go_runtime/kaitai
go: downloading github.com/kaitai-io/kaitai_struct_go_runtime v0.11.0
go: found github.com/kaitai-io/kaitai_struct_go_runtime/kaitai in github.com/kaitai-io/kaitai_struct_go_runtime v0.11.0
BUILD OK

=== RUN   TestExplore
tracks=4 artists=1 albums=1 artworks=4
  track 3: "Houses" artist="mobygratis" album="catalog" year=0 file="/Contents/mobygratis/catalog/houses.mp3" anlz="/PIONEER/USBANLZ/P054/00018252/ANLZ0000.DAT"
  track 1: "get it" artist="mobygratis" album="catalog" year=2020 file="/Contents/mobygratis/catalog/get-it.mp3" anlz="/PIONEER/USBANLZ/P05C/00011ED2/ANLZ0000.DAT"
  track 2: "new key" artist="mobygratis" album="catalog" year=2020 file="/Contents/mobygratis/catalog/new-key.mp3" anlz="/PIONEER/USBANLZ/P00C/000249F8/ANLZ0000.DAT"
  track 4: "out stands" artist="mobygratis" album="catalog" year=2020 file="/Contents/mobygratis/catalog/out-stands.mp3" anlz="/PIONEER/USBANLZ/P03F/0002F7F5/ANLZ0000.DAT"
--- PASS: TestExplore (0.00s)
PASS
ok  	github.com/nzoschke/deadca7/link/pdb	0.206s

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/pdb/pdb_test.go (file state is current in your context — no need to Read it back)

pdb/rekordbox_pdb.go:1307:2: self-assignment of tmp77
pdb/rekordbox_pdb.go:1681:2: self-assignment of tmp101
pdb/rekordbox_pdb.go:3017:2: self-assignment of tmp187
---TEST ALL---
ok  	github.com/nzoschke/deadca7/link	(cached)
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]
?   	github.com/nzoschke/deadca7/link/cmd/fetch	[no test files]
?   	github.com/nzoschke/deadca7/link/nfs	[no test files]
ok  	github.com/nzoschke/deadca7/link/pdb	0.231s

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

port  type  count  lens          sources
50000 0x00      3  44            192.168.0.160
50000 0x02      5  50            192.168.0.160,192.168.0.194
50000 0x04      3  38            192.168.0.160
50000 0x05      3  38            192.168.0.193
50000 0x06     82  54            192.168.0.160,192.168.0.192,192.168.0.193
50000 0x0a      3  38            192.168.0.160
50001 0x03    262  53            192.168.0.193
50001 0x04      6  100           192.168.0.193
50001 0x0b    273  60            192.168.0.192
50001 0x28     28  96            192.168.0.192
50002 0x0a     49  1116          192.168.0.192
50002 0x40     39  38            192.168.0.192

Command running in background with ID: bqe9dmr1n. Output is being written to: /private/tmp/claude-501/-Users-noah-conductor-workspaces-deadca7-san-diego/5e143c63-1d6b-4233-91af-bb63e39e8beb/tasks/bqe9dmr1n.output. You will be notified when it completes. To check interim output, use Read on that file path.

=== on-air / precise-position parsing ===
150:        return Arrays.equals(data, 0x0b, 0x0b + len, name, 0, len) &&
151:                data[0x0b + len + 1] == 0;
193:                                    case PRECISE_POSITION:
199:                                    case CHANNELS_ON_AIR:
212:                                            deliverSyncCommand(packet.getData()[0x2b]);
218:                                            deliverMasterYieldCommand(packet.getData()[0x21]);
643:    private final Set<OnAirListener> onAirListeners = Collections.newSetFromMap(new ConcurrentHashMap<>());
664:            onAirListeners.add(listener);
678:            onAirListeners.remove(listener);
690:        return Set.copyOf(onAirListeners);
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

                    }
                    try {
                        if (received) {
                            final Util.PacketType kind = Util.validateHeader(packet,  BEAT_PORT);
                            if (kind != null) {
                                switch (kind) {

                                    case BEAT:
                                        if (isPacketLongEnough(packet, 96, "beat")) {
                                            deliverBeat(new Beat(packet));
                                        }
                                        break;

                                    case PRECISE_POSITION:
                                        if (isPacketLongEnough(packet, 60, "precise position")) {
                                            deliverPrecisePosition(new PrecisePosition(packet));
                                        }
                                        break;

                                    case CHANNELS_ON_AIR:
                                        if (packet.getLength() == 0x35 ||  // New DJM-V10 packet with six channels
                                                isPacketLongEnough(packet, 0x2d, "channels on-air")) {
                                            final Set<Integer> audibleChannels = getAudibleChannels(packet);
                                            deliverOnAirUpdate(audibleChannels);
                                            if (isFromXdjAz(packet)) {  // Record that we saw an XDJ-AZ channels-on-air packet
                                                lastSeenXdjAzChannelsOnAir.set(System.nanoTime());
                                            }
                                        }
                                        break;

                                    case SYNC_CONTROL:
                                        if (isPacketLongEnough(packet, 0x2c, "sync control command")) {
                                            deliverSyncCommand(packet.getData()[0x2b]);
                                        }
                                        break;

                                    case MASTER_HANDOFF_REQUEST:
                                        if (isPacketLongEnough(packet, 0x28, "tempo master handoff request")) {
                                            deliverMasterYieldCommand(packet.getData()[0x21]);
                                        }
                                        break;

                                    case MASTER_HANDOFF_RESPONSE:
                                        if (isPacketLongEnough(packet, 0x2c, "tempo master handoff response")) {
                                            byte[] data = packet.getData();
                                            deliverMasterYieldResponse(data[0x21], data[0x2b] == 1);
                                        }
                                        break;

                                    case FADER_START_COMMAND:
                                        if (isPacketLongEnough(packet, 0x28, "fader start command")) {
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

I cannot provide the specific byte layouts you're requesting based on the content provided. 

While the webpage describes what these packets do—for example, it mentions that port 50001 type `0x03` handles "Channels On Air" and type `0x0b` handles "Absolute Position"—it does not include the detailed byte-level specifications, field offsets, or data structure definitions for any of these packet types.

The page is a table of contents and overview document that "details what has been learned so far about the protocol," but the actual technical specifications would be found in the linked detailed pages (like `beats.html`, `mixer_integration.html`, `media.html`, etc.), which are not included in the content you provided.

Additionally, there is no mention of packet type `0x40` on port 50002 in this document—only types `05`, `06`, `0a`, `19`, `1a`, `29`, and `34` are listed for that port.

To get the exact byte layouts you need, you would need to consult the full documentation pages on the DJ Link Ecosystem Analysis site.

=== getAudibleChannels ===
                                            final Set<Integer> audibleChannels = getAudibleChannels(packet);
                                            deliverOnAirUpdate(audibleChannels);
                                            if (isFromXdjAz(packet)) {  // Record that we saw an XDJ-AZ channels-on-air packet
                                                lastSeenXdjAzChannelsOnAir.set(System.nanoTime());
                                            }
                                        }
                                        break;

                                    case SYNC_CONTROL:
                                        if (isPacketLongEnough(packet, 0x2c, "sync control command")) {
                                            deliverSyncCommand(packet.getData()[0x2b]);
                                        }
                                        break;

                                    case MASTER_HANDOFF_REQUEST:
                                        if (isPacketLongEnough(packet, 0x28, "tempo master handoff request")) {
                                            deliverMasterYieldCommand(packet.getData()[0x21]);
                                        }
                                        break;

                                    case MASTER_HANDOFF_RESPONSE:
                                        if (isPacketLongEnough(packet, 0x2c, "tempo master handoff response")) {
                                            byte[] data = packet.getData();
                                            deliverMasterYieldResponse(data[0x21], data[0x2b] == 1);
                                        }
                                        break;

                                    case FADER_START_COMMAND:
                                        if (isPacketLongEnough(packet, 0x28, "fader start command")) {
                                            byte[] data = packet.getData();
                                            Set<Integer> playersToStart = new TreeSet<>();
                                            Set<Integer> playersToStop = new TreeSet<>();
                                            for (int channel = 1; channel <= 4; channel++) {
                                                switch (data[0x23 + channel]) {

                                                    case 0:
                                                        playersToStart.add(channel);
                                                        break;

                                                    case 1:
                                                        playersToStop.add(channel);
                                                        break;

                                                    case 2:
                                                        // Leave this player alone
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

20:    private final int trackLength;
25:    private final int playbackPosition;
28:     * The device playback pitch found in the packet.
30:    private final int pitch;
45:        super(packet, "Precise position", 0x3c, 0x21);
46:        trackLength = (int)Util.bytesToNumber(packetBytes, 0x24, 4);
47:        playbackPosition = (int)Util.bytesToNumber(packetBytes, 0x28, 4);
48:        long rawPitch = Util.bytesToNumber(packetBytes, 0x2c, 4);
49:        if (rawPitch > 0x80000000L) {  // This is a negative effective tempo
50:            rawPitch -= 0x100000000L;
52:        pitch = (int)Util.percentageToPitch(rawPitch / 100.0);
53:        bpm = (int)Util.bytesToNumber(packetBytes, 0x38, 4) * 10;
63:        return trackLength;
73:        return playbackPosition;
78:        return pitch;
83:        return (int)Math.round(bpm / Util.pitchToMultiplier(pitch));
88:        return "Precise position: Device " + deviceNumber + ", name: " + deviceName +
89:                ", pitch: " + String.format("%+.2f%%", Util.pitchToPercentage(pitch)) +
103:        return (master != null) && master.getAddress().equals(address) && master.getDeviceNumber() == deviceNumber;
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

    private static Set<Integer> getAudibleChannels(DatagramPacket packet) {
        byte[] data = packet.getData();
        Set<Integer> audibleChannels = new TreeSet<>();
        for (int channel = 1; channel <= 4; channel++) {
            if (data[0x23 + channel] != 0) {
                audibleChannels.add(channel);
            }
        }
        if (packet.getLength() >= 0x35) {
            for (int channel = 5; channel <= 6; channel++) {
                if (data[0x28 + channel] != 0) {
                    audibleChannels.add(channel);
                }
            }
        }
        audibleChannels = Collections.unmodifiableSet(audibleChannels);
        return audibleChannels;
    }
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

online as device 5
    3015 testdata/session.jsonl

port  type  src              count
50000 0x00 192.168.0.160       3
50000 0x02 192.168.0.160       3
50000 0x04 192.168.0.160       1
50000 0x05 192.168.0.193       1
50000 0x06 192.168.0.160      65
50000 0x06 192.168.0.192      46
50000 0x06 192.168.0.193      49
50000 0x06 192.168.0.194      46
50000 0x0a 192.168.0.160       3
50001 0x03 192.168.0.193     329
50001 0x04 192.168.0.193       6
50001 0x0b 192.168.0.192    3228
50002 0x0a 192.168.0.192     581
50002 0x0a 192.168.0.194     484
50002 0x40 192.168.0.192      48
50002 0x40 192.168.0.194      48

=== precise position 0x0b from .192 (device, pos ms, len, pitch, bpm) ===
  first: (3, 286, 29565, 25, 10030)
  mid:   (3, 286, 29565, 25, 10030)
  last:  (3, 286, 29565, 25, 10030)
  pos range: 29565 .. 29565 ms
  pitch set: [25]
=== channels-on-air 0x03 from mixer (distinct audible sets over time) ===
  on-air: [3]
=== status 0x0a distinct (device, trackID, playing, onair, master, bpm) ===
   (4, 0, False, False, False, 655.35)
   (3, 1, False, True, True, 100.0)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet.go has been updated successfully. (file state is current in your context — no need to Read it back)

-rw-r--r--@ 1 noah  staff  3233024 Jun  7 10:50 testdata/session.jsonl
on-air pkt len=53  byte@0x21=33 (mixer device?)  name@0x0b='DJM-V10'
wrote position.jsonl and onair.jsonl
beats.jsonl
claim.jsonl
devices.jsonl
export.pdb
onair.jsonl
position.jsonl
status.jsonl

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet_test.go has been updated successfully. (file state is current in your context — no need to Read it back)

ok  	github.com/nzoschke/deadca7/link	0.228s
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]
?   	github.com/nzoschke/deadca7/link/cmd/fetch	[no test files]
?   	github.com/nzoschke/deadca7/link/nfs	[no test files]
ok  	github.com/nzoschke/deadca7/link/pdb	(cached)

0x40 len=38
  hex=5173707431576d4a4f4c404e58532d4757000000000000000000000000000001011900020201
  name@0x0b='NXS-GW' byte@0x1f..end=01011900020201

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

Command running in background with ID: b6j1o9b35. Output is being written to: /private/tmp/claude-501/-Users-noah-conductor-workspaces-deadca7-san-diego/5e143c63-1d6b-4233-91af-bb63e39e8beb/tasks/b6j1o9b35.output. You will be notified when it completes. To check interim output, use Read on that file path.

port  type  src              count
50000 0x00 192.168.0.160       3
50000 0x02 192.168.0.160       3
50000 0x04 192.168.0.160       1
50000 0x05 192.168.0.193       1
50000 0x06 192.168.0.160      77
50000 0x06 192.168.0.192      56
50000 0x06 192.168.0.193      59
50000 0x06 192.168.0.194      56
50000 0x0a 192.168.0.160       3
50001 0x03 192.168.0.193     398
50001 0x04 192.168.0.193       6
50001 0x0b 192.168.0.192    3822
50001 0x0b 192.168.0.194    3396
50001 0x28 192.168.0.192     150
50001 0x28 192.168.0.194     152
50002 0x0a 192.168.0.192     982
50002 0x0a 192.168.0.194     853
50002 0x40 192.168.0.192      60
50002 0x40 192.168.0.194      58

=== position advancing? (deck 3 .192) first/last playback ms ===
  dev 3 playback 29565 -> 21074 ms, len=286s
  dev 4 playback 1466 -> 93023 ms, len=244s
=== beats: distinct BPM seen per deck (tempo change?) ===
  dev 3 beat BPMs: [105.0, 113.99] beat-in-bar cycle: [4, 1, 2, 3, 4, 1, 2, 3]
  dev 4 beat BPMs: [102.0] beat-in-bar cycle: [2, 3, 4, 1, 3, 4, 1, 2]
=== channels-on-air timeline (distinct sets) ===
  on-air: [3]
  on-air: []
  on-air: [3]
  on-air: [3, 4]
  on-air: [4]
  on-air: [3, 4]
  on-air: [4]
  on-air: [3, 4]
  on-air: [4]
  on-air: [3, 4]
=== status: distinct (dev, track, playing, onair, master, sync, bpm) ===
   (3, 1, False, True, True, False, 100.0)
   (4, 0, False, False, False, False, 655.35)
   (3, 0, False, True, True, False, 655.35)
   (3, 0, False, True, True, False, 105.0)
   (3, 2, False, True, True, False, 105.0)
   (3, 2, True, True, True, False, 105.0)
   (4, 0, False, False, False, False, 102.0)
   (4, 4, False, False, False, False, 102.0)
   (3, 2, True, False, True, False, 105.0)
   (4, 4, False, False, False, True, 102.0)
   (4, 4, False, True, False, True, 102.0)
   (4, 4, True, True, False, True, 102.0)
   (4, 4, True, True, True, True, 102.0)
   (3, 2, True, False, False, False, 105.0)
   (3, 2, True, True, False, False, 105.0)
   (4, 4, True, True, False, False, 102.0)
   (3, 2, False, False, True, False, 105.0)
   (4, 4, True, True, True, False, 102.0)
   (3, 2, False, False, False, False, 105.0)
   (3, 0, False, False, False, False, 655.35)
   (3, 0, False, False, False, False, 113.99)
   (3, 3, False, False, False, False, 113.99)
   (3, 3, False, True, False, False, 113.99)
   (3, 3, True, True, False, False, 113.99)
   (3, 3, True, False, False, False, 113.99)
   (3, 3, False, True, False, True, 113.99)
   (3, 3, True, True, False, True, 113.99)
=== mixer 0x04 (len100) sample ===
  hex= 5173707431576d4a4f4c04444a4d2d56313000000000000000000000000000010021004014210000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

-rw-r--r--@ 1 noah  staff  5924236 Jun  7 10:58 testdata/live.jsonl
onair.jsonl: 10 packets covering the toggle
mixer04.jsonl: 1 sample
beats.jsonl
claim.jsonl
devices.jsonl
export.pdb
mixer04.jsonl
onair.jsonl
position.jsonl
status.jsonl

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet_test.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/packet_test.go has been updated successfully. (file state is current in your context — no need to Read it back)

ok  	github.com/nzoschke/deadca7/link	0.228s
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]
?   	github.com/nzoschke/deadca7/link/cmd/fetch	[no test files]
?   	github.com/nzoschke/deadca7/link/nfs	[no test files]
ok  	github.com/nzoschke/deadca7/link/pdb	(cached)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

        FADER_START_COMMAND(0x02, "Fader Start", BeatFinder.BEAT_PORT),
        CHANNELS_ON_AIR(0x03, "Channels On Air", BeatFinder.BEAT_PORT),
        MEDIA_QUERY(0x05, "Media Query", VirtualCdj.UPDATE_PORT),
        MEDIA_RESPONSE(0x06, "Media Response", VirtualCdj.UPDATE_PORT),
        DEVICE_HELLO(0x0a, "Device Hello", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_REKORDBOX_LIGHTING_HELLO_BYTES(0x10, "Rekordbox Lighting Hello Bytes", VirtualCdj.UPDATE_PORT),
        DEVICE_NUMBER_STAGE_1(0x00, "Device Number Claim Stage 1", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_NUMBER_WILL_ASSIGN(0x01, "Device Number Will Be Assigned", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_NUMBER_STAGE_2(0x02, "Device Number Claim Stage 2", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_NUMBER_ASSIGN(0x03, "Device Number Assignment", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_NUMBER_STAGE_3(0x04, "Device Number Claim Stage 3", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_NUMBER_ASSIGNMENT_FINISHED(0x05, "Device Number Assignment Finished", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_KEEP_ALIVE(0x06, "Device Keep-Alive", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_NUMBER_IN_USE(0x08, "Device Number In Use", DeviceFinder.ANNOUNCEMENT_PORT),
        CDJ_STATUS(0x0a, "CDJ Status", VirtualCdj.UPDATE_PORT),
        OPUS_METADATA(0x56, "OPUS Metadata", VirtualCdj.UPDATE_PORT),
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

        FADER_START_COMMAND(0x02, "Fader Start", BeatFinder.BEAT_PORT),
        CHANNELS_ON_AIR(0x03, "Channels On Air", BeatFinder.BEAT_PORT),
        MEDIA_QUERY(0x05, "Media Query", VirtualCdj.UPDATE_PORT),
        MEDIA_RESPONSE(0x06, "Media Response", VirtualCdj.UPDATE_PORT),
        DEVICE_HELLO(0x0a, "Device Hello", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_REKORDBOX_LIGHTING_HELLO_BYTES(0x10, "Rekordbox Lighting Hello Bytes", VirtualCdj.UPDATE_PORT),
        DEVICE_NUMBER_STAGE_1(0x00, "Device Number Claim Stage 1", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_NUMBER_WILL_ASSIGN(0x01, "Device Number Will Be Assigned", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_NUMBER_STAGE_2(0x02, "Device Number Claim Stage 2", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_NUMBER_ASSIGN(0x03, "Device Number Assignment", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_NUMBER_STAGE_3(0x04, "Device Number Claim Stage 3", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_NUMBER_ASSIGNMENT_FINISHED(0x05, "Device Number Assignment Finished", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_KEEP_ALIVE(0x06, "Device Keep-Alive", DeviceFinder.ANNOUNCEMENT_PORT),
        DEVICE_NUMBER_IN_USE(0x08, "Device Number In Use", DeviceFinder.ANNOUNCEMENT_PORT),
        CDJ_STATUS(0x0a, "CDJ Status", VirtualCdj.UPDATE_PORT),
        OPUS_METADATA(0x56, "OPUS Metadata", VirtualCdj.UPDATE_PORT),
        LOAD_TRACK_COMMAND(0x19, "Load Track Command", VirtualCdj.UPDATE_PORT),
        LOAD_TRACK_ACK(0x1a, "Load Track Acknowledgment", VirtualCdj.UPDATE_PORT),
        MASTER_HANDOFF_REQUEST(0x26, "Master Handoff Request", BeatFinder.BEAT_PORT),
        MASTER_HANDOFF_RESPONSE(0x27, "Master Handoff Response", BeatFinder.BEAT_PORT),
        BEAT(0x28, "Beat", BeatFinder.BEAT_PORT),
        PRECISE_POSITION(0x0b, "Precise Position", BeatFinder.BEAT_PORT),
        MIXER_STATUS(0x29, "Mixer Status", VirtualCdj.UPDATE_PORT),
        SYNC_CONTROL(0x2a, "Sync Control", BeatFinder.BEAT_PORT),
        LOAD_SETTINGS_COMMAND(0x34, "Load Settings Command", VirtualCdj.UPDATE_PORT);
        ByteBuffer content = ByteBuffer.allocate(0x1f + payload.remaining());
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

Command running in background with ID: bo2q5ehma. Output is being written to: /private/tmp/claude-501/-Users-noah-conductor-workspaces-deadca7-san-diego/5e143c63-1d6b-4233-91af-bb63e39e8beb/tasks/bo2q5ehma.output. You will be notified when it completes. To check interim output, use Read on that file path.

port  type  src              count   NEW?
50000 0x00 192.168.0.160       3
50000 0x02 192.168.0.160       3
50000 0x04 192.168.0.160       1
50000 0x05 192.168.0.193       1
50000 0x06 192.168.0.160      65
50000 0x06 192.168.0.192      47
50000 0x06 192.168.0.193      49
50000 0x06 192.168.0.194      46
50000 0x0a 192.168.0.160       3
50001 0x03 192.168.0.193     329
50001 0x04 192.168.0.193       6
50001 0x0b 192.168.0.192    3211
50001 0x0b 192.168.0.194    3212
50002 0x0a 192.168.0.192     579
50002 0x0a 192.168.0.194     482
50002 0x40 192.168.0.192      49
50002 0x40 192.168.0.194      49

=== status flag transitions (did SYNC/MASTER get pressed?) ===
  (device, playing, master, sync):
    (3, False, True, True)
    (4, False, False, False)
  dev 3 position 63772 -> 63772 ms
  dev 4 position 141546 -> 141546 ms

mixer 0x04 count=6 len=100
  byte offsets that vary across samples: ['0x24']
  sample payload 0x1f..0x2a: 0100210040142100000000

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

48	      near-static, only byte 0x24 varies; sparse periodic housekeeping, low value
49	
50	### Status — port 50002 (needs virtual CDJ online)
51	- [x] captured CDJ 0x0a status (len 1116) — `testdata/status.jsonl`
52	- [x] decode 0x0a (status.go DecodeStatus): play/master/sync/on-air flags @0x89,
53	      bpm @0x92, pitch @0x8d, beat @0xa0, beat-in-bar @0xa6
54	- [x] loaded-track fields: track ID @0x2c, source player @0x28, slot @0x29,
55	      type @0x2a. Verified: track 1, player 3, SD, rekordbox.
56	- [x] CDJ type 0x40 on 50002 identified: "NXS-GW" (Nexus Gateway) keepalive,
57	      device 25, low-rate, undocumented on djl-analysis — not player status, skip
58	- [x] two-deck status captured (deck 3 track 1; deck 4 empty, bpm 655.35 sentinel)
59	- [ ] capture scenarios: playing, on-air toggle, tempo change, track load

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

ok  	github.com/nzoschke/deadca7/link	(cached)
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]
?   	github.com/nzoschke/deadca7/link/cmd/fetch	[no test files]
?   	github.com/nzoschke/deadca7/link/nfs	[no test files]
ok  	github.com/nzoschke/deadca7/link/pdb	(cached)
--- fixtures ---
beats.jsonl
claim.jsonl
devices.jsonl
export.pdb
mixer04.jsonl
onair.jsonl
position.jsonl
status.jsonl

Web search results for query: "Pioneer AlphaTheta DJM-V10 fader start enable channel fader start setting utility"

Links: [{"title":"Does the DJM-V10 support the Fader Start feature? – AlphaTheta Help Center","url":"https://support.pioneerdj.com/hc/en-us/articles/4408479744409-Does-the-DJM-V10-support-the-Fader-Start-feature"},{"title":"Using my DJM-V10 – AlphaTheta Help Center","url":"https://support.pioneerdj.com/hc/en-us/sections/4408486280089-Using-my-DJM-V10"},{"title":"DJM-V10 - AlphaTheta Help Center","url":"https://support.pioneerdj.com/hc/en-us/sections/4416568754457-DJM-V10"},{"title":"DJM-V10 > FAQ | AlphaTheta Support","url":"https://faq.pioneerdj.com/product.php?c=6880&lang=en&p=DJM-V10&t=faq"},{"title":"DJM-V10-LF > FAQ | AlphaTheta Support","url":"https://faq.pioneerdj.com/product.php?c=13&lang=en&p=DJM-V10-LF&t=faq"},{"title":"How to use the Pioneer DJ DJM-V10 DJ Mixer (Instruction manual) - AlphaTheta Help Center","url":"https://support.pioneerdj.com/hc/en-us/articles/4404659749145-How-to-use-the-Pioneer-DJ-DJM-V10-DJ-Mixer-Instruction-manual"},{"title":"There are three controls to adjust the volume: TRIM, channel fader, and MASTER LEVEL. What's the difference? – AlphaTheta Help Center","url":"https://support.pioneerdj.com/hc/en-us/articles/4409816634009-There-are-three-controls-to-adjust-the-volume-TRIM-channel-fader-and-MASTER-LEVEL-What-s-the-difference"},{"title":"Pioneer DJM V10 User Manual | PDF | Disc Jockey | Headphones","url":"https://www.scribd.com/document/658531563/Pioneer-DJM-V10-User-Manual"},{"title":"Are the channel fader curves on the DJM-V10 and the DJM-V10-LF the same? – AlphaTheta Help Center","url":"https://support.pioneerdj.com/hc/en-us/articles/4406611970713-Are-the-channel-fader-curves-on-the-DJM-V10-and-the-DJM-V10-LF-the-same"}]

Based on the search results, the DJM-V10 does not support the Fader Start feature. This means there is no fader start enable setting or channel fader start utility available for this mixer model.

The search results show that Pioneer/AlphaTheta support documentation explicitly addresses this limitation, indicating that fader start functionality is not part of the DJM-V10's capabilities.


REMINDER: You MUST include the sources above in your response to the user using markdown hyperlinks.

=== media query in VirtualCdj.java ===
499:            case MEDIA_QUERY:
503:            case MEDIA_RESPONSE:
504:                deliverMediaDetailsUpdate(new MediaDetails(packet));
1540:    private final Set<MediaDetailsListener> detailsListeners =
1560:    public void addMediaDetailsListener(MediaDetailsListener listener) {
1574:    public void removeMediaDetailsListener(MediaDetailsListener listener) {
1586:    public Set<MediaDetailsListener> getMediaDetailsListeners() {
1597:    public void deliverMediaDetailsUpdate(final MediaDetails details) {
1598:        for (MediaDetailsListener listener : getMediaDetailsListeners()) {
1703:    private final static byte[] MEDIA_QUERY_PAYLOAD = { 0x01,
1721:        byte[] payload = new byte[MEDIA_QUERY_PAYLOAD.length];
1722:        System.arraycopy(MEDIA_QUERY_PAYLOAD, 0, payload, 0, MEDIA_QUERY_PAYLOAD.length);
1727:        assembleAndSendPacket(Util.PacketType.MEDIA_QUERY, payload, announcement.getAddress(), UPDATE_PORT);
1985:        payload[0x05] = getDeviceNumber();
1999:                    payload[0x05] = number;
2008:                        payload[0x05] = number;
2206:        Util.numberToBytes((int)snapshot.getBeatInterval(), payload, 0x05, 4);
2685:            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x050
2735:        payload[0x05] = payload[0x02];
=== search MediaDetailsListener / packet build ===
(eval):1: no matches found: repos/Deep-Symmetry/beat-link/git/trees/main?recursive=1
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

=== MEDIA_QUERY_PAYLOAD + requestMediaDetails ===
    /**
     * The bytes after the device name in a media query packet.
     */
    private final static byte[] MEDIA_QUERY_PAYLOAD = { 0x01,
    0x00, 0x0d, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

    /**
     * Ask a device for information about the media mounted in a particular slot. Will update the
     * {@link MetadataFinder} when a response is received.
     *
     * @param slot the slot holding media we want to know about.
     *
     * @throws IOException if there is a problem sending the request.
     */
    @API(status = API.Status.STABLE)
    public void sendMediaQuery(SlotReference slot) throws IOException {
        final DeviceAnnouncement announcement = DeviceFinder.getInstance().getLatestAnnouncementFrom(slot.player);
        if (announcement == null) {
            throw new IllegalArgumentException("Device for " + slot + " not found on network.");
        }
        ensureRunning();
        byte[] payload = new byte[MEDIA_QUERY_PAYLOAD.length];
        System.arraycopy(MEDIA_QUERY_PAYLOAD, 0, payload, 0, MEDIA_QUERY_PAYLOAD.length);
        payload[2] = getDeviceNumber();
        System.arraycopy(keepAliveBytes, 44, payload, 5, 4);  // Copy in our IP address.
        payload[12] = (byte)slot.player;
        payload[16] = slot.slot.protocolValue;
        assembleAndSendPacket(Util.PacketType.MEDIA_QUERY, payload, announcement.getAddress(), UPDATE_PORT);
    }

    /**
     * The bytes after the device name in a sync control command packet.
     */
    private final static byte[] SYNC_CONTROL_PAYLOAD = { 0x01,
            0x00, 0x0d, 0x00, 0x08, 0x00, 0x00, 0x00, 0x0d, 0x00, 0x00, 0x00, 0x0f };

=== assembleAndSendPacket ===
    private void assembleAndSendPacket(Util.PacketType kind, byte[] payload, InetAddress destination, int port) throws IOException {
        DatagramPacket packet = Util.buildPacket(kind,
                ByteBuffer.wrap(keepAliveBytes, DEVICE_NAME_OFFSET, DEVICE_NAME_LENGTH).asReadOnlyBuffer(),
                ByteBuffer.wrap(payload));
        packet.setAddress(destination);
        packet.setPort(port);
        try {
            socket.get().send(packet);
        } catch (java.net.NoRouteToHostException e) {
            logger.warn("Unable to route packet to player at address {}", destination);
            listNetworkInterfaces();
            throw e;
        }
    }
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

    public static DatagramPacket buildPacket(PacketType type, ByteBuffer deviceName, ByteBuffer payload) {
        ByteBuffer content = ByteBuffer.allocate(0x1f + payload.remaining());
        content.put(getMagicHeader());
        content.put(type.protocolValue);
        content.put(deviceName);
        content.put(payload);
        return new DatagramPacket(content.array(), content.capacity());
=== MediaDetails parsing (0x06 response) ===
17: * Represents information about the media mounted in a player's slot; returned in response to a media query packet.
25:     * The player and slot in which this media resides.
28:    public final SlotReference slotReference;
34:    public final CdjStatus.TrackType mediaType;
49:     * The number of rekordbox tracks in the media database. Will be zero if {@link #mediaType} is not rekordbox.
52:    public final int trackCount;
55:     * The number of rekordbox playlists in the media database. Will be zero if {@link #mediaType} is not rekordbox.
58:    public final int playlistCount;
61:     * The color tint that should be applied to the user interface when a player mounts this media.
64:    public final Color color;
71:    public final boolean hasMySettings;
105:    private static final Set<Integer> expectedMediaPacketSizes = new HashSet<>(Collections.singletonList(0xc0));
112:    public static final int MINIMUM_PACKET_SIZE = 0xc0;
128:            if (source[i] == 0x00 && source[i + 1] == 0x00) {
140:     * @param slotReference Slot Reference to which these media details belong
141:     * @param mediaType     Media Type to Emulate
143:     * @param trackCount    How many tracks are present in the media
144:     * @param playlistCount How many playlists are present in the media
148:    public MediaDetails(SlotReference slotReference, CdjStatus.TrackType mediaType, String name,
149:                 int trackCount, int playlistCount, long lastModified) {
153:        this.slotReference = slotReference;
154:        this.mediaType = mediaType;
155:        this.name = name;
157:        this.trackCount = trackCount;
159:        this.playlistCount = playlistCount;
161:        this.color = new Color(0);
163:        this.hasMySettings = false;
192:        final int payloadLength = (int) Util.bytesToNumber(packetCopy, 0x22, 2);
193:        if (packetCopy.length != payloadLength + 0x24) {
195:                    payloadLength, packetCopy.length - 0x24);
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

    /**
     * Constructor sets all the immutable interpreted fields based on the packet content.
     *
     * @param packet the media response packet that was received
     */
    MediaDetails(DatagramPacket packet) {
        this(packet.getData(), packet.getLength());
    }

    /**
     * Constructor sets all the immutable interpreted fields based on the packet content.
     *
     * @param packet       the media response packet that was received or cached
     * @param packetLength the number of bytes within the packet which were actually received
     */
    @API(status = API.Status.STABLE)
    public MediaDetails(byte[] packet, int packetLength) {
        byte[] packetCopy = new byte[packetLength];  // Make a defensive copy
        System.arraycopy(packet, 0, packetCopy, 0, packetLength);
        rawBytes = ByteBuffer.wrap(packetCopy).asReadOnlyBuffer();  // Save for safe sharing.

        if (packetCopy.length < MINIMUM_PACKET_SIZE) {
            throw new IllegalArgumentException("Unable to create a MediaDetails object, packet too short: we need " + MINIMUM_PACKET_SIZE +
                    " bytes and were given only " + packetCopy.length);
        }

        final int payloadLength = (int) Util.bytesToNumber(packetCopy, 0x22, 2);
        if (packetCopy.length != payloadLength + 0x24) {
            logger.warn("Received Media response packet with reported payload length of {} and actual payload length of {}",
                    payloadLength, packetCopy.length - 0x24);
        }

        if (!expectedMediaPacketSizes.contains(packetCopy.length)) {
            logger.warn("Processing Media response packets with unexpected lengths {}.", packetCopy.length);
            expectedMediaPacketSizes.add(packetCopy.length);
        }

        final int hostPlayer = packetCopy[0x27];
        final CdjStatus.TrackSourceSlot hostSLot = CdjStatus.TRACK_SOURCE_SLOT_MAP.get(packetCopy[0x2b]);
        if (hostSLot == null) {
            throw new IllegalArgumentException("Unrecognized slot for media response:" + packetCopy[0x2b]);
        }
        slotReference = SlotReference.getSlotReference(hostPlayer, hostSLot);

        final CdjStatus.TrackType type = CdjStatus.TRACK_TYPE_MAP.get(packetCopy[0xaa]);
        if (type == null) {
            throw new IllegalArgumentException("Unrecognized media type for media response:" + packetCopy[0xaa]);
        }
        mediaType = type;

        if (hostPlayer >= 40) {  // Rekordbox mobile does not send media name or creation date.
            name = "rekordbox mobile";
            creationDate = "";
        } else {
            int mediaNameLength = getUTF16StringLength(packetCopy, 0x2c, 0x40);
            int creationDateLength = getUTF16StringLength(packetCopy, 0x6c, 0x18);

            name = new String(packetCopy, 0x2c, mediaNameLength, StandardCharsets.UTF_16BE).trim();
            creationDate = new String(packetCopy, 0x6c, creationDateLength, StandardCharsets.UTF_16BE).trim();
        }

        trackCount = (int) Util.bytesToNumber(packetCopy, 0xa6, 2);
        color = ColorItem.colorForId(packetCopy[0xa8]);
        playlistCount = (int) Util.bytesToNumber(packetCopy, 0xae, 2);
        hasMySettings = packetCopy[0xab] != 0;
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/media.go (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/announce.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/capture/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/capture/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

78		c1, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4zero, Port: 50001})
79		if err != nil {
80			return errors.WithStack(err)
81		}
82		defer c1.Close()
83	
84		c2, err := net.ListenUDP("udp", &net.UDPAddr{IP: net.IPv4zero, Port: 50002})
85		if err != nil {
86			return errors.WithStack(err)
87		}
88		defer c2.Close()
89	
90		var vcdj *link.VCDJ
91		var ipNet *net.IPNet
92		if announce {
93			vcdj, ipNet, err = online(c0, device, name)
94			if err != nil {
95				return err
96			}
97		}
98	
99		enc := json.NewEncoder(f)
100		pkts := make(chan Packet)
101		record := func(b []byte, src *net.UDPAddr) {
102			select {
103			case pkts <- packet(b, 50000, src):
104			case <-ctx.Done():
105			}
106		}
107	
108		g, ctx := errgroup.WithContext(ctx)
109		g.Go(func() error { return listen(ctx, c1, 50001, pkts) })
110		g.Go(func() error { return listen(ctx, c2, 50002, pkts) })
111	
112		if announce {
113			g.Go(func() error {
114				err := vcdj.Online(ctx, c0, ipNet, record)
115				fmt.Fprintf(os.Stderr, "virtual CDJ %q ran as device %d\n", vcdj.Name, vcdj.Device)
116				return err
117			})

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/capture/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

BUILD OK
--- trigger media query to .192 (player 3) SD slot 2 ---
online as device 5
sent media query to 192.168.0.192 player 3 slot 2
captured 996 packets to testdata/media.jsonl
virtual CDJ "deadca7" ran as device 5

media query 0x05 sent (captured as our own): 0
media response 0x06 received: 5
  from 192.168.0.192:39331 len 192
  hex 5173707431576d4a4f4c0643444a2d33303030000000000000000000000000010003009c0000000300000002004400690067004c00610062000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000032003000320036002d00300033002d003200390000000000310030003000300000000000000000000000000000000000000000000000000000000408000101000000030000001dc4600000000000154eec0000

media.jsonl trimmed to 2 response(s)
Media: name="DigLab" player=3 slot=sd type=1 tracks=4 playlists=3
--- PASS: TestMediaExplore (0.00s)
PASS
ok  	github.com/nzoschke/deadca7/link	0.222s

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/media_test.go (file state is current in your context — no need to Read it back)

?   	github.com/nzoschke/deadca7/link/cmd/fetch	[no test files]
?   	github.com/nzoschke/deadca7/link/nfs	[no test files]
ok  	github.com/nzoschke/deadca7/link/pdb	(cached)
     932 testdata/media.jsonl

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

248:    private static final byte[] keepAliveBytes = {
361:            0x01, 0x02, 0x00, 0x29,  0x00, 0x00, 0x00, 0x00,   0x00
390:    private void setTempoMaster(DeviceUpdate newMaster) {
421:    public void setTempoEpsilon(double epsilon) {
452:                metronome.setTempo(newTempo);
554:                setTempoMaster(update);
563:                    if (update.deviceNumber != masterYieldedFrom.get()) {
564:                        if (masterYieldedFrom.get() == 0) {
567:                            logger.warn("Expected player {} to yield master to us, but player {} did.", masterYieldedFrom.get(), update.deviceNumber);
571:                    masterYieldedFrom.set(0);
572:                    setTempoMaster(null);
582:                setTempoMaster(null);
1225:            setTempoMaster(null);
1254:                    setSendingStatus(false);
1273:    private void sendAnnouncement(InetAddress broadcastAddress) {
2006:                    if (number >= 0x29 && number < 0x30) { // We can see rekordbox mobile, this will work too.
2147:                    setSendingStatus(false);
2188:    public long sendBeat() {
2189:        return sendBeat(getPlaybackPosition());
2201:    public long sendBeat(Snapshot snapshot) {
2250:    public synchronized void setSendingStatus(boolean send) throws IOException {
2300:                sendStatus();
2424:    private static final byte[] MASTER_HANDOFF_REQUEST_PAYLOAD = { 0x01,
2441:    public synchronized void becomeTempoMaster() throws IOException {
2451:            byte[] payload = new byte[MASTER_HANDOFF_REQUEST_PAYLOAD.length];
2452:            System.arraycopy(MASTER_HANDOFF_REQUEST_PAYLOAD, 0, payload, 0, MASTER_HANDOFF_REQUEST_PAYLOAD.length);
2459:            assembleAndSendPacket(Util.PacketType.MASTER_HANDOFF_REQUEST, payload, currentMaster.address, BeatFinder.BEAT_PORT);
2491:                metronome.setTempo(tempo);
2527:                setTempo(getMasterTempo());
2582:    public void setTempo(double bpm) {
2588:        metronome.setTempo(bpm);
2671:    private final AtomicInteger masterYieldedFrom = new AtomicInteger(0);
2729:    private void sendStatus() {
2809:                            becomeTempoMaster();
2838:                                assembleAndSendPacket(Util.PacketType.MASTER_HANDOFF_RESPONSE, payload, lastStatusFromNewMaster.getAddress(), UPDATE_PORT);
2859:                            masterYieldedFrom.set(deviceNumber);
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

=== sendBeat + setSendingStatus (2180-2320) ===

    /**
     * Sends a beat packet. Generally this should only be invoked when our {@link BeatSender} has determined that it is
     * time to do so, but it is public to allow experimentation.
     *
     * @return the beat number that was sent, computed from the current (or stopped) playback position
     */
    @API(status = API.Status.STABLE)
    public long sendBeat() {
        return sendBeat(getPlaybackPosition());
    }

    /**
     * Sends a beat packet. Generally this should only be invoked when our {@link BeatSender} has determined that it is
     * time to do so, but it is public to allow experimentation.
     *
     * @param snapshot the time at which the beat to be sent occurred, for computation of its beat number
     *
     * @return the beat number that was sent
     */
    @API(status = API.Status.STABLE)
    public long sendBeat(Snapshot snapshot) {
        byte[] payload = new byte[BEAT_PAYLOAD.length];
        System.arraycopy(BEAT_PAYLOAD, 0, payload, 0, BEAT_PAYLOAD.length);
        payload[0x02] = getDeviceNumber();

        Util.numberToBytes((int)snapshot.getBeatInterval(), payload, 0x05, 4);
        Util.numberToBytes((int)(snapshot.getBeatInterval() * 2), payload, 0x09, 4);
        Util.numberToBytes((int)(snapshot.getBeatInterval() * 4), payload, 0x11, 4);
        Util.numberToBytes((int)(snapshot.getBeatInterval() * 8), payload, 0x19, 4);

        final int beatsLeft = 5 - snapshot.getBeatWithinBar();
        final int nextBar = (int)(snapshot.getBeatInterval() * beatsLeft);
        Util.numberToBytes(nextBar, payload, 0x0d, 4);
        Util.numberToBytes(nextBar + (int)snapshot.getBarInterval(), payload, 0x15, 4);

        Util.numberToBytes((int)Math.round(snapshot.getTempo() * 100), payload, 0x3b, 2);
        payload[0x3d] = (byte)snapshot.getBeatWithinBar();
        payload[0x40] = getDeviceNumber();

        try {
            assembleAndSendPacket(Util.PacketType.BEAT, payload, broadcastAddress.get(), BeatFinder.BEAT_PORT);
        } catch (IOException e) {
            logger.error("VirtualCdj Failed to send beat packet.", e);
        }

        return snapshot.getBeat();
    }

    /**
     * Will hold a non-null value when we are sending our own status packets, which can be used to stop the thread
     * doing so. Most uses of Beat Link will not require this level of activity. However, if you want to be able to
     * take over the tempo master role, and control the tempo and beat alignment of other players, you will need to
     * turn on this feature, which also requires that you are using one of the standard player numbers, 1-4.
     */
    private AtomicBoolean sendingStatus = null;

    /**
     * Control whether the Virtual CDJ sends status packets to the other players. Most uses of Beat Link will not
     * require this level of activity. However, if you want to be able to take over the tempo master role, and control
     * the tempo and beat alignment of other players, you will need to turn on this feature, which also requires that
     * you are using one of the standard player numbers, 1-4.
     *
     * @param send if {@code true} we will send status packets, and can participate in (and control) tempo and beat sync
     *
     * @throws IllegalStateException if the virtual CDJ is not running, or if it is not using a device number in the
     *                               range 1 through 4
     * @throws IOException if there is a problem starting the {@link BeatFinder}
     */
    @API(status = API.Status.STABLE)
    public synchronized void setSendingStatus(boolean send) throws IOException {
        if (isSendingStatus() == send) {
            return;
        }

        if (send) {  // Start sending status packets.
            ensureRunning();
            if (proxyingForVirtualRekordbox.get()) {
                throw new IllegalStateException("Cannot send status when in Opus Quad rekordbox lighting mode.");
            }
        

… truncated — see the raw .jsonl for the full output.

=== payload/template arrays ===
495:            case LOAD_TRACK_ACK:
1733:    private final static byte[] SYNC_CONTROL_PAYLOAD = { 0x01,
1747:        byte[] payload = new byte[SYNC_CONTROL_PAYLOAD.length];
1748:        System.arraycopy(SYNC_CONTROL_PAYLOAD, 0, payload, 0, SYNC_CONTROL_PAYLOAD.length);
1934:    private final static byte[] LOAD_TRACK_PAYLOAD = { 0x01,
1982:        byte[] payload = new byte[LOAD_TRACK_PAYLOAD.length];
1983:        System.arraycopy(LOAD_TRACK_PAYLOAD, 0, payload, 0, LOAD_TRACK_PAYLOAD.length);
2015:        assembleAndSendPacket(Util.PacketType.LOAD_TRACK_COMMAND, payload, target.getAddress(), UPDATE_PORT);
2028:    private final static byte[] LOAD_SETTINGS_PAYLOAD = { 0x02,
2068:        byte[] payload = new byte[LOAD_SETTINGS_PAYLOAD.length];

=== status template + sendStatus (2675-2760) ===
     */
    private final AtomicInteger packetCounter = new AtomicInteger(0);

    /**
     * The template used to assemble a status packet when we are sending them.
     */
    private final static byte[] STATUS_PAYLOAD = { 0x01,
            0x04, 0x00, 0x00, (byte)0xf8, 0x00, 0x00, 0x01, 0x00, 0x00,  0x03,  0x01,  0x00, 0x00, 0x00, 0x00, 0x01,  // 0x020
            0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, (byte)0xa0, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x030
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x040
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x050
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x04, 0x04, 0x00, 0x00, 0x00, 0x04,  // 0x060
            0x00, 0x00, 0x00, 0x04, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x31, 0x2e, 0x34, 0x33,  // 0x070
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, (byte)0xff, 0x00, 0x00, 0x10, 0x00, 0x00,  // 0x080
            (byte)0x80, 0x00, 0x00, 0x00, 0x7f, (byte)0xff, (byte)0xff, (byte)0xff, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x090
            0x00, 0x00, 0x00, 0x00, 0x01, (byte)0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x0a0
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x0b0
            0x00, 0x10, 0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x01, 0x00, 0x00,  // 0x0c0
            0x12, 0x34, 0x56, 0x78, 0x00, 0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00,  // 0x0d0
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x0e0
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x0f0
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  // 0x100
            0x00, 0x00, 0x00, 0x15, 0x00, 0x00, 0x07, 0x61, 0x00, 0x00, 0x06, 0x2f  // 0x110
    };

    /**
     * Gets the current playback position, then checks if we are within {@link BeatSender#SLEEP_THRESHOLD} ms before
     * an upcoming beat, or {@link BeatSender#BEAT_THRESHOLD} ms after one, sleeping until that is no longer the case.
     *
     * @return the current playback position, potentially after having delayed a bit so that is not too near a beat
     */
    private Snapshot avoidBeatPacket() {
        Snapshot playState = getPlaybackPosition();
        double distance = playState.distanceFromBeat();
        while (playing.get() &&
                (((distance < 0.0) && (Math.abs(distance) <= BeatSender.SLEEP_THRESHOLD)) ||
                ((distance >= 0.0) && (distance <= (BeatSender.BEAT_THRESHOLD + 1))))) {
            try {
                //noinspection BusyWait
                Thread.sleep(2);
            } catch (InterruptedException e) {
                logger.warn("Interrupted while sleeping to avoid beat packet; ignoring.", e);
            }
            playState = getPla

… truncated — see the raw .jsonl for the full output.

=== BEAT_PAYLOAD ===
2175:    private static final byte[] BEAT_PAYLOAD = { 0x01,
    private static final byte[] BEAT_PAYLOAD = { 0x01,
            0x00, 0x0d, 0x00, 0x3c,  0x01, 0x01, 0x01, 0x01,   0x02, 0x02, 0x02, 0x02,  0x10, 0x10, 0x10, 0x10,
            0x04, 0x04, 0x04, 0x04,  0x20, 0x20, 0x20, 0x20,   0x08, 0x08, 0x08, 0x08,    -1,   -1,   -1,   -1,
            -1,   -1,   -1,   -1,    -1,   -1,   -1,   -1,     -1,   -1,   -1,   -1,    -1,   -1,   -1,   -1,
            -1,   -1,   -1,   -1,  0x00, 0x10, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x0b, 0x00, 0x00, 0x0d};
=== LOAD_TRACK_PAYLOAD + sender (1934-2016) ===
    private final static byte[] LOAD_TRACK_PAYLOAD = { 0x01,
            0x00, 0x0d, 0x00, 0x34,  0x0d, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x32,  0x00, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00
    };

    /**
     * Send a packet to the target player telling it to load the specified track from the specified source player.
     *
     * @param targetPlayer the device number of the player that you want to have load a track
     * @param rekordboxId the identifier of a track within the source player's rekordbox database
     * @param sourcePlayer the device number of the player from which the track should be loaded
     * @param sourceSlot the media slot from which the track should be loaded
     * @param sourceType the type of track to be loaded
     *
     * @throws IOException if there is a problem sending the command
     * @throws IllegalStateException if the {@code VirtualCdj} is not active or the target device cannot be found
     */
    @API(status = API.Status.STABLE)
    public void sendLoadTrackCommand(int targetPlayer, int rekordboxId,
                                     int sourcePlayer, CdjStatus.TrackSourceSlot sourceSlot, CdjStatus.TrackType sourceType)
            throws IOException {
        final DeviceUpdate update = getLatestStatusFor(targetPlayer);
        if (update == null) {
            throw new IllegalArgumentException("Device " + targetPlayer + " not found on network.");
        }
        sendLoadTrackCommand(update, rekordboxId, sourcePlayer, sourceSlot, sourceType);
    }

    /**
     * Send a packet to the target device telling it to load the specified track from the specified source player.
     *
     * @param target an update from the player that you want to have load a track
     * @param rekordboxId the identifier of a track within the source player's rekordbox database
     * @param sourcePlayer the device number of the player from which the track should be loaded
     * @param sourceSlot the media slot from which the track should be loaded
     * @param sourceType the type of track to be loaded
     *
     * @throws IOException if there is a problem sending the command
     * @throws IllegalStateException if the {@code VirtualCdj} is not active
     */
    @API(status = API.Status.STABLE)
    public void sendLoadTrackCommand(DeviceUpdate target, int rekordboxId,
                                     int sourcePlayer, CdjStatus.TrackSourceSlot sourceSlot, CdjStatus.TrackType sourceType)
            throws IOException {
        ensureRunning();
        logger.info("Sending track load command, target player: {}, id: {}, sourcePlayer: {}, sourceSlot: {}, sourceType: {}", target.getDeviceNumber(), rekordboxId, sourcePlayer, sourceSlot, sourceType);
        byte[] payload = new byte[LOAD_TRACK_PAYLOAD.length];
        System.arraycopy(LOAD_TRACK_PAYLOAD, 0, payload, 0, LOAD_TRACK_PAYLOAD.length);
        payload[0x02] = getDeviceNumber();
        payload[0x05] = getDeviceNumber();
        payload[0x09] = (byte)sourcePlayer;
        payload[0x0a] = sourceSlot.protocolValue;
        payload[0x0b] = sourceType.protocolValue;

… truncated — see the raw .jsonl for the full output.

=== SYNC_CONTROL_PAYLOAD (1733) + sender ===
    private final static byte[] SYNC_CONTROL_PAYLOAD = { 0x01,
            0x00, 0x0d, 0x00, 0x08, 0x00, 0x00, 0x00, 0x0d, 0x00, 0x00, 0x00, 0x0f };

    /**
     * Assemble and send a packet that performs sync control, turning a device's sync mode on or off, or telling it
     * to become the tempo master.
     *
     * @param target an update from the device whose sync state is to be set
     * @param command the byte identifying the specific sync command to be sent
     *
     * @throws IOException if there is a problem sending the command to the device
     */
    private void sendSyncControlCommand(DeviceUpdate target, byte command) throws IOException {
        ensureRunning();
        byte[] payload = new byte[SYNC_CONTROL_PAYLOAD.length];
        System.arraycopy(SYNC_CONTROL_PAYLOAD, 0, payload, 0, SYNC_CONTROL_PAYLOAD.length);
        payload[2] = getDeviceNumber();
        payload[8] = getDeviceNumber();
        payload[12] = command;
        assembleAndSendPacket(Util.PacketType.SYNC_CONTROL, payload, target.getAddress(), BeatFinder.BEAT_PORT);
    }

    /**
     * Tell a device to turn sync on or off.
     *
     * @param deviceNumber the device whose sync state is to be set
     * @param synced {@code} true if sync should be turned on, else it will be turned off
     *
=== LOAD_SETTINGS_PAYLOAD (2028-2075) ===
    private final static byte[] LOAD_SETTINGS_PAYLOAD = { 0x02,
            0x0d, 0x0d, 0x00, 0x50,  0x12, 0x34, 0x56, 0x78,   0x00, 0x00, 0x00, 0x03,  0x00, 0x00, 0x00, 0x00,
            0x00, 0x01, 0x00, 0x00,  0x00, 0x01, 0x01, 0x01,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,   0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00
    };

    /**
     * Send a packet to the target player telling it to apply the supplied settings.
     *
     * @param targetPlayer the device number of the player that you want to configure
     * @param settings the device settings that should be loaded
     *
     * @throws IOException if there is a problem sending the command
     * @throws IllegalStateException if the {@code VirtualCdj} is not active or the target device cannot be found
     */
    @API(status = API.Status.STABLE)
    public void sendLoadSettingsCommand(int targetPlayer, PlayerSettings settings)
            throws IOException {
        final DeviceUpdate update = getLatestStatusFor(targetPlayer);
        if (update == null) {
            throw new IllegalArgumentException("Device " + targetPlayer + " not found on network.");
        }
        sendLoadSettingsCommand(update, settings);
    }

    /**
     * Send a packet to the target device telling it to apply the supplied settings.
     *
     * @param target an update from the player that you want to configure
     * @param settings the device settings that should be loaded
     *
     * @throws IOException if there is a problem sending the command
     * @throws IllegalStateException if the {@code VirtualCdj} is not active
     */
    @API(status = API.Status.STABLE)
    public void sendLoadSettingsCommand(DeviceUpdate target, PlayerSettings settings) throws IOException {
        ensureRunning();
        byte[] payload = new byte[LOAD_SETTINGS_PAYLOAD.length];
        System.arraycopy(LOAD_SETTINGS_PAYLOAD, 0, payload, 0, LOAD_SETTINGS_PAYLOAD.length);
        Util.setPayloadByte(payload, 0x20, getDeviceNumber());
        Util.setPayloadByte(payload, 0x21, (byte)target.getDeviceNumber());
        Util.setPayloadByte(payload, 0x2c, settings.onAirDisplay.protocolValue);
        Util.setPayloadByte(payload, 0x2d, settings.lcdBrightness.protocolValue);
        Util.setPayloadByte(payload, 0x2e

… truncated — see the raw .jsonl for the full output.

STATUS  len=253 "01040000f800000100000301000000000100000001000000000000a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100040400000004000000040001000000000000312e343300000000000000000000ff0000100000800000007fffffff00100000000000000000000001ff00000000000000000000000000000000010000000000000000000010000000100000000000000f0100001234567800000001010101010000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000015000007610000062f"
BEAT    len= 65 "01000d003c010101010202020210101010040404042020202008080808ffffffffffffffffffffffffffffffffffffffffffffffff00100000000000000b00000d"
MREQ    len=  9 "01000d00040000000d"
SYNC    len= 13 "01000d00080000000d0000000f"
LOADT   len= 57 "01000d00340d000000000000000000000000000032000000000000000000000000000000000000000000000000000000000000000000000000"

2021:    private final static byte[] YIELD_ACK_PAYLOAD = { 0x01,
    private final static byte[] YIELD_ACK_PAYLOAD = { 0x01,
            0x00, 0x0d, 0x00, 0x08,  0x00, 0x00, 0x00, 0x0d,   0x00, 0x00, 0x00, 0x01
    };
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

277:    public static void setPayloadByte(byte[] payload, int address, byte value) {
278-        payload[address - 0x1f] = value;
279-    }
280-
LOADS len=85 020d0d00501234567800000003000000000001000000010101000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
Shell cwd was reset to /Users/noah/conductor/workspaces/deadca7/san-diego

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/master.go (file state is current in your context — no need to Read it back)

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/commands.go (file state is current in your context — no need to Read it back)

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/master_test.go (file state is current in your context — no need to Read it back)

ok  	github.com/nzoschke/deadca7/link	0.220s

File created successfully at: /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/master/main.go (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/master/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/master/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/master/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

BUILD+VET OK

Command running in background with ID: bx07v1hij. Output is being written to: /private/tmp/claude-501/-Users-noah-conductor-workspaces-deadca7-san-diego/5e143c63-1d6b-4233-91af-bb63e39e8beb/tasks/bx07v1hij.output. You will be notified when it completes. To check interim output, use Read on that file path.

=== our events (stderr) ===
   1 EXIT=0
   1 online as device 1
=== packet inventory + NEW types ===
50000 0x00 192.168.0.160       3
50000 0x02 192.168.0.160       3
50000 0x04 192.168.0.160       1
50000 0x05 192.168.0.193       1
50000 0x06 192.168.0.160      28
50000 0x06 192.168.0.192      20
50000 0x06 192.168.0.193      22
50000 0x06 192.168.0.194      20
50000 0x0a 192.168.0.160       3
50001 0x03 192.168.0.193     147
50001 0x04 192.168.0.193       6
50001 0x0b 192.168.0.192    1383
50001 0x0b 192.168.0.194    1383
50001 0x28 192.168.0.160      85
50002 0x0a 192.168.0.160     207
50002 0x0a 192.168.0.192     250
50002 0x0a 192.168.0.194     207
50002 0x40 192.168.0.192      22
50002 0x40 192.168.0.194      19

deck 3 (playing,master,sync,bpm):
    (False, True, True, 113.99)
    (False, False, True, 113.99)
deck 4 (playing,master,sync,bpm):
    (False, False, False, 102.0)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/master/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/master/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/master/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/master/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/master/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/master/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/cmd/master/main.go has been updated successfully. (file state is current in your context — no need to Read it back)

BUILD OK

Command running in background with ID: bkkwaj6ss. Output is being written to: /private/tmp/claude-501/-Users-noah-conductor-workspaces-deadca7-san-diego/5e143c63-1d6b-4233-91af-bb63e39e8beb/tasks/bkkwaj6ss.output. You will be notified when it completes. To check interim output, use Read on that file path.

=== our events ===
   1 no existing master; taking the role
   1 online as device 1
=== directed packets captured? (0x26/0x27/0x2a) ===
  none captured

Command running in background with ID: be2bpdy9m. Output is being written to: /private/tmp/claude-501/-Users-noah-conductor-workspaces-deadca7-san-diego/5e143c63-1d6b-4233-91af-bb63e39e8beb/tasks/be2bpdy9m.output. You will be notified when it completes. To check interim output, use Read on that file path.

=== our events ===
   1 no existing master; taking the role
   1 online as device 1
=== directed packets (0x26/0x27/0x2a) on the wire ===
  none
=== did deck 3 yield master to us? (deck 3 master flag over time) ===
  deck3 master=False

    3378 testdata/master.jsonl
kept 2 emitted status + 2 emitted beat packets from our VCDJ (device 1)
ok  	github.com/nzoschke/deadca7/link	(cached)
ok  	github.com/nzoschke/deadca7/link/pdb	(cached)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/master_test.go has been updated successfully. (file state is current in your context — no need to Read it back)

ok  	github.com/nzoschke/deadca7/link	0.220s
?   	github.com/nzoschke/deadca7/link/cmd/capture	[no test files]
?   	github.com/nzoschke/deadca7/link/cmd/fetch	[no test files]
?   	github.com/nzoschke/deadca7/link/cmd/master	[no test files]
?   	github.com/nzoschke/deadca7/link/nfs	[no test files]
ok  	github.com/nzoschke/deadca7/link/pdb	(cached)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

ok  	github.com/nzoschke/deadca7/link	(cached)
ok  	github.com/nzoschke/deadca7/link/pdb	(cached)
--- files ---
announce.go
announce_test.go
commands.go
link.go
link_test.go
master.go
master_test.go
media.go
media_test.go
net.go
packet.go
packet_test.go
status.go
--- cmds ---
capture
fetch
master
--- fixtures ---
beats.jsonl
claim.jsonl
devices.jsonl
export.pdb
master.jsonl
media.jsonl
mixer04.jsonl
onair.jsonl
position.jsonl
status.jsonl

Command running in background with ID: bhuqf6lmh. Output is being written to: /private/tmp/claude-501/-Users-noah-conductor-workspaces-deadca7-san-diego/5e143c63-1d6b-4233-91af-bb63e39e8beb/tasks/bhuqf6lmh.output. You will be notified when it completes. To check interim output, use Read on that file path.

=== our events ===
online as device 1
requested master handoff from player 3
received master handoff (0x27) from 192.168.0.192; now master
=== directed packets on the wire ===
  port=50001 type=0x27 src=192.168.0.192   count=1
=== deck 3 master flag over time ===
  deck3 master=True
  deck3 master=False

handoff.jsonl: 1 real 0x27 master-response packet from deck 3
  device@0x21=3  yielded@0x2b=1  len=44

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/master_test.go has been updated successfully. (file state is current in your context — no need to Read it back)

The file /Users/noah/conductor/workspaces/deadca7/san-diego/link/TODO.md has been updated successfully. (file state is current in your context — no need to Read it back)

ok  	github.com/nzoschke/deadca7/link	0.232s
ok  	github.com/nzoschke/deadca7/link/pdb	(cached)