Longtime Scratch Live/Hardware User with no issues. When using Serato DJ with Denon MC6000MK2 I am having a problem. I am playing a track and (for no reason I have been able to identify) the Mix Emergency fader goes to the center, and the track I am not playing goes to the main display. Sometimes I am getting the track ready to mix. Sometimes it is resting at the beginning of the track (IOW I am not touching anything). I have experienced this when using the controller's crossfader (both synced with audio and just using the crossfader for video switching) I tried using an external midi controller and had the same problem. I removed the Mix Emergency crossfader's midi assignments (just using a hot key to switch the video) and still had the same problem. This happens on almost every track. I have not experienced this problem using the same set up with Serato Video. Serato DJ 1.71 Mix Emergency 2.7.1 Denon MC6000MK2 Mac OSX 10.9.5 2.6 Intel I7 16GB 1600 Mhz DDR3