Reply to DDM4000 + Traktor Pro + Macbook speakers = problem

Hi,

Got my DDM4000 working with cue and everything. I have one problem though.

How would I go about routing the audio out from the mixer back into the soundcard to be played through the mac internal speakers or a soundsystem designed for PCs ?

Thanks ! I have created an aggregate device including two sound cards + the internal soundcard on the macbook. Soundcards are Behringer UCA200 (2in 2out) and a M-audio Fasttrack Pro (4in/4out).