Originally Posted by
tyfurious
I'm assuming that the app outputs via the headphone jack... So, head over to Radioshack and get a 1/8" headphone jack to RCA stereo chord. Hook that up to your S4, in your software go to the input/output section and make sure the input is setup... Go to the decks and change deck C or D to a live input deck and make sure the right input is selected. Writing this from my iPhone, so hopefully it makes sense.
If problems persist, are you on Traktor Pro 2 or the S4 software?