You can use timecode with the djm 850 without needing an audio 8/10, correct. The soundcard is built into the djm. You will need to buy traktor. What you need to do is outlined here - http://pioneer.jp/support/connect/dj-e/ ... djm-850-s/ In summary of above link: All you need to buy is this version of traktor ($119 US) - http://www.native-instruments.com/#/pro ... ?page=2068 And this is the pdf on how it all connects / configures - http://pioneer.jp/support/connect/pdf/d ... .01.16.pdf There is diagrams in that PDF on how it all connects