Rekordbox + Traktor not responding to CDJ Commands

I own a CDJ 900 Nexus which I purchased for the sole purpose of controlling Deck B over HID mode.

I use both Traktor and Rekordbox.

Every time I fire up Traktor or Rekordbox and connect the CDJ to the software, everything works fine, only for about a couple seconds, after spinning the jogwheel a little bit every button on the CDJ seems to "Freeze". CDJ doesn't disconnect from DJ software, nor does my Macbook Pro fail to recognize the MIDI inputs from the CDJ (tested through Audio MIDI setup)

My computer still recognizes CDJ inputs [i.e. play, cue, beat divide buttons etc.] However Traktor won't responde to my CDJ inputs, nor will Rekordbox.

Everything just locks up and I can't control my deck.

Needed to say if my track is still playing, the CDJ still displays moving through the waveform and spinning of the Jog Wheel display.

I don't believe this is an issue with the CDJ, at all. I also don't beleive this is a USB cable issue because even after the CDJ freezes, my computer is still successful at recognizing CDJ inputs when tested with Audio MIDI setup.

It is the DJ SOFTWARE. Traktor, and Rekordbox I believe; just not wanting to respond to my commands on my brand new $2000 CDJ.

Super annoying, having to always restart the CDJ and reconnect, only to have it freeze up again, and again, and again. VERY anti-climatic.

Spces and shit:

Macbook Pro A1226 (2007)

Intel Core 2 Duo 2.4 Ghz

6GB DDR2RAM

OS X 10.9.5 Mavericks

Traktor Pro 2.8.1/Rekordbox 5.4.2

CDJ 900NXS Firmware 1.31

Chroma USB cable.

What's going on?

Why isn't my DJ software responding to my CDJ commands though it is still technically connected via. HID (link)?

Is there drivers I need?

NO I WILL NOT UPLOAD A VIDEO

(sorry Pioneer, No offense. Native Instruments always harasses me for videos, I hate it).

SOMEONE HELP BEFORE I KILL MYSELF!

Geraldo Munroe January 15, 2019 04:59

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Date Votes

4 comments

Well, for starters, rekordbox isn't supported on an OS lower than 10.11, so there's that, but I don't believe that's 100% the issue, as the last reported system requirements for Traktor 2 were a minimum of 10.9.

There are no firmware updates that relate to your issues.

There are no drivers necessary for the CDJ-900NXS on Mac, so that can't be it.

You're using what should be a reliable cable, so my suggestions for further troubleshooting are:

- try a different USB cable
- try a different USB port
- if you have access to test either software on a different computer, please try that

Failing those, it could be there's an issue with the USB controller on the CDJ itself, but let's start with the simple stuff first.

Pulse January 18, 2019 00:47 0 votes

Hey Pulse,

I've tried different USB cables and different USB ports, I haven't been able to test it on a different machine however I did get an exchange for a different 900NXS unit and I am still experiencing the same problem, if that helps; at all.

The "disconnection" from Traktor usually happens when the Snap button on my Kontrol S4 starts blinking (high cpu load), and this issue happens most when playing high quality modern heavy beats; if that helps.

Once again I am on an A1226 with 6GB of RAM, and from what I understand the CDJ is compatible with an Intel Core 2 Duo 2.0Ghz or higher ,which I do have.

Although this issue seems to arise quicker when playing high quality music and essentially loading up the CPU labour - I still get a frozen CDJ when solely the CDJ is connected to my computer with no other programs running and playing lower quality VBR or 128kbps tracks, it just takes longer for the freeze to happen i.e. if I vigorously scratch the jog wheel or backspin in a track before the track is completely loaded.

Whether this is hardware or software related, CDJ or MBP related, I just want my setup to work, I paid $2000 for it ya dig?

Do you have ANY other suggestions?

Geraldo Munroe January 20, 2019 21:28 0 votes

@Geraldo > Yes, the hardware is compatible, but that doesn't mean that your computer is necessarily up to dealing with the workload. You noted that the disconnect occurs when the high-CPU load takes place... I'll point out that you're using a 12 year-old computer, and that will most likely be the issue.

Pulse January 21, 2019 17:17 0 votes

Hello, please i need help with this same problem. I have been using my pioneer cdjs 900 with pioneer DJM 2000 with rekordbox dj software for years now, i play almost every weekend, just few days ago my two cdjs stop responding during playing, i have to switch everything off and on again, before i can play for sometime, before freezing again. Please i need help.Thank you

Eddy September 13, 2019 21:22 0 votes