Why is there no S/PDIF output on any of your current DJ controllers, not even at the flagship S4? I'm working in the audio industry in the development of professional audio products and I just can't get it… It's not a relevant cost factor. And as a DJ: The most popular DJ mixers have digital inputs and outputs. The DJing platform (Traktor) is fully digital already. So why adding A/D and D/A conversions unnecessarily to the signal path?