Offizieller Kommentar
The engineering team has informed me that the reason there are some differences in the accuracy of the position of the hardware to software because the resolution of the magvel pro crossfader in the DDJ-1000 is optimized for the extremities of the fader; in other words, it's much more accurate at the ends of the fader for scratching.
Don't worry 100% about the markings on the hardware mixer, simply move the crossfader to a position where the on-screen crossfader is at the mid-point and the audio will be balanced.

