Request a Traktor Pro mapping for the S4. As some of the folks are getting things sorted on their laptops with audio drops and what not. Some guys are frustrated, others are getting new laptops. I think in the meantime for those who already have Traktor Pro it would be beneficial to those users to use the Kontrol S4 in midi mode and still get to gig with it, get used to the hardware, and give a little gap time to remedy any audio drops. Perhaps NI or Rainer or a forum member could develop something?