I just bought a DJM-2000 and two brand new CDJ-2000 NEXUS. As I want to use the setup within NI Traktor (2.5.1) on my MacBook Pro I need to create an aggregated audio device within MacOS CoreAudio. My idea is to use the CDJ-2000 Nexus audio interfaces for channel 2 and 3 on the DJM-2000 which are connected via SP/DIF to the DJM-2000. And I want to use the DJM-2000 audio interface on channel 1 and 4 for the Remix Decks within Traktor. Why? Because the DJM-2000 is configured for 6 channel out and 2 channel in to have the possibiltiy to route the MASTER OUT to the DJM-2000 back to Traktor for recording my mixes. Otherwise I would be able to use the DJM-2000 with 8 channel out.
For the first try I created an aggregate for the two CDJ-2000 NEXUS audio interfaces. After configuring the outputs within Traktor everything works fine and the sound was routed via the CDJs over the SP/DIF to the DJM-2000.
Then I created the aggregate including the DJM-2000 and the two CDJ-2000 NEXUS. I routed the outputs within Traktor but no sound appears. So I found out that it might be possible that the bitrates of the audio interfaces of the CDJ-2000 NEXUS and the DJM-2000 might be different. A colleague told me that it might be useful to use the "resample" function within CoreAudio. But as far as I know there might be problems like crackling of the sound when CoreAudio is "resampling" to identical bitrates.
Now my question is if someone out there is using this setup and was able to build up a setup which is working like I want to use it?
And is it possible to setup the audio inferfaces of the CDJ-2000 NEXUS to another sampling rate?
Hope for useful tips :-)
BTW: I will build a TRAKTOR MIDI mapping for the CDJ-2000 NEXUS until the native HID support of TRAKTOR will be released for the devices. Today it is NOT possible to use the CDJ-2000 NEXUS as HID controller like the CDJ-2000s. Stay tuned for the mapping - I will spread the mapping via www.traktorbible.com under my nickname mclub7 ;-)