Vendor device IDs for CDJ-3000: Serato + NativeInstruments, with pcaps

[felucia2]

Hi swiftb0y, thanks for the documentation you made! It's been the reference for a
project reverse-engineering CDJ HID control I am working on together with some LLM-assistance. During the process I used a CDJ-3000 and I noticed the "contributions wanted" note on the handshake page (https://swiftb0y.github.io/CDJHidProtocol/hid-analysis/handshake.html).

I captured both handshakes for Serato and Rekordbox for the CDJ-3000:

    CDJ3000 / Serato             = 390EAC84A745F29D7F74
    CDJ3000 / NativeInstruments  = 0B540B224A0AD0F73177

Captured on a macOS laptop using tshark on XHC0/XHC1 USB interfaces. Both decode with the FNV-1a scheme and TLV framing your
docs describe, using stage_base=0x10 (stages 0x11-0x15), same as the NXS2 generation.

Sample of the Serato exchange (0x11-0x15, header trimmed of zero padding):

    0x11 announce   CDJ->host   00 f0 01 00 01 00 11 06 01 04 03 14
    0x12 challenge  host->CDJ   00 f0 01 00 01 00 12 27 01 08 53 65 72 61 74 6f
                                02 0b 73 65 72 61 74 6f 20 44 4a 03 12 05 0b 09
                                0e 01 06 03 0c 06 07 0c 05 0e 0c 02 01
    0x13 response   CDJ->host   00 f0 01 00 01 00 13 2a 01 0b 50 69 6f 6e 65 65
                                72 44 4a 02 09 43 44 4a 33 30 30 30 04 0a 08 04
                                00 0e 01 02 07 0f 03 0a 09 01 03 0d 0d 04 02 04
    0x14 host-resp  host->CDJ   00 f0 01 00 01 00 14 35 01 08 53 65 72 61 74 6f
                                02 0b 73 65 72 61 74 6f 20 44 4a 04 0a 02 0f 0e
                                05 05 02 06 01 05 16 03 09 00 0e 0a 0c 08 04 0a
                                07 04 05 0f 02 09 0d 07 0f 07 04
    0x15 confirm    CDJ->host   00 f0 01 00 01 00 15 02

I will attach some pcaps if it allows me (trimmed to a window around each handshake for size; each is
100-1000 frames, well under 1MB, includes real surrounding traffic for context, not
just the isolated handshake frames).

Surprisingly the CDJ-3000X does not seem to require a handshake anymore.

Let me know if you are interested in other captures or information to map out the HID protocol of these devices.

traktor_serato_cdj3000_capture.zip

[Swiftb0y]

Hey there. Thank you for contributing to this. I'm currently quite busy, so I need some of your help here. I don't think the pcaps belong into this repo, but feel free to open a PR to add the handshakes to the table. Also feel free to document the absence of the handshake on the 3000X. I highly appreciate it.

[felucia2]

Sure, the pcaps are just there as proof in case you wanted to validate. I'll create a PR to add those to the table. There is some more information regarding other device ids in Rekordbox, although I can't validate them as I don't have all these devices. I can supply them anyway so you at least have them for future reference.

[Swiftb0y]

I'm fine with that as long as you mark it well enough as being speculation/extrapolation rather than being fact.

[AChorostian]

@felucia2 Can you please share pcap with selecting deck, and maybe loading and playing track?

I'm working on simulating hardware with Traktor, and already tried:

• CDJ2000NXS2 - finished handshake, But getting 0x21 frames with flashing red jog ring - looks like some error...
• CDJ3000 - thanks to you :) finished handshake and able to manually map few buttons. anyway probably fake CDJ didn't select deck yet and I'm getting empty 0x21 frames (or with some LEDs if I map them manually)

(My project is about replacing CDJ1000MK3 main board with arduino-like MCU and make compatible with Traktor)

[felucia2]

I created a PR and then branched off it to add additional device ids, up to you if you eventually want to merge the second one. If this method doesn't work I can create a second PR.

@AChorostian This might not be the place for it as to not pollute the issue, but also didn't want to leave you hanging. Very cool project, I have been wanting to wire up an older CDJ to a Teensy to have full control but currently not at that skill level yet. I asked Claude to generate a script for CDJ-3000 deck selector with Traktor based off my CDJ-3000X->CDJ-3000 Traktor bridge (untested): https://gist.github.com/felucia2/0fe7e5004b03ebcd285a6e032105badf. Hope this helps.

[Swiftb0y]

Consider moving the discussion to the Deep symmetry zulip. Thanks :)