* The mixer cue buttons (pre-listen) have a double function - The original function (pre-listen) is activated by combining shift-cue, and pressing cue without shift enables/disables the filter knobs. * I never use the cross-fader, I've currently mapped it to seeking in the Preview Track (this really works nice and you can quickly seek through it this way) popping back to traktor reminded me of how tight the beat grid is, and how dropping the a grid marker was a sure thing. It's work in progress, and of course this mapping is made according to my personal preference. use a traktor sound card ( i used audio 2 ) now everything works except scratchine is sloppy, searching and pitch bending fine. I'm pretty far right now, and I think it's quite usable already. I'm in the process of making a mapping for the DDJ-RZ in Traktor 2 Pro.