Question, is it possible to put 2x D2 and the s8 toegether, the S8 for deck A & B and the 2x D2 for deck C & D . Is it possible and hoe to doe?
Yes. Just connect them (with drivers installed). Then designate one of the D2 for deck A/C and hit the DECK button to switch to C and designate the other one for deck B/D and hit the DECK button to switch to D.
Be aware; depending on your computer's processing power all of your controls and LED/Screen feedback as well as the Traktor software may become somewhat jerky.