Reply to What is needed to set up Traktor with a Xone 42 mixer?

I have a Xone 42 and I would like to set it up with Traktor. I was wondering what sound card/audio interface would be needed to be able to route all four Traktor decks to the four mixer channels.

Also, just out of curiosity, does Allen & Heath make a mixer with a built in sound card like the DJM-900?

Thanks.