At home I have DJM750 and 2 CDJ900 Nexus.
In the beginning I could not connect it, it was just not working.
But since 2 months Traktor had an update for this and it worked fine.
I know I have to do the audio/midi thing, add a new device, and adjust your settings in traktor: output routing external 1 2 3 4 , and choose the new device in audio input.
Today I had to show something on CDJ2000. I did everything as I did with my CDJ900 Nexus but the sound only came out of one channel. Both decks went out of my first channel. Out of my second channel, no sound came.
So I could not mix, because it all came out of one channel.
How is this possible? I have to play on the same device soon so I hope somebody can help.
I tried to connect them with USB HID cables right into my mac.