Hi there - I am having an issue very similar to this gentleman:
Basically, the headphones mix knob controls both the headphones mix AND the X-Fader contour, while the X-Fader contour knob does not have any effect at all. It appears to be a bugged assignment in the software. I have updated to the most recent firmware (1.5.2). Please advise, thanks.
All on Prime 4.