Hi, I've always wanted to get into DJ'ing but never had the time, but now that I do I have downloaded a few software demos and bought the equipment I need. I know that to have the ability to cue tracks whilst keeping the other mix coming out the speakers I needed another soundcard.... So I bough a cheap and cheerful one off amazon. This is hard to explain so please bare with me. My problem is when I aggregate the soundcards (mac's own and this other one) together inorder for Traktor to recognaise them ( I end up with a 3in 4 out combo), a problem develops....unlike in other software (mixxx and VDJ) where you can just state that you have to sound cards and then assign to outputs to monitor and 2 to speakers; traktor gets confused and plays the mix through both speakers and headphones, and when I press the button on the controller for the deck i want to hear through the headphones I hear the entire mix plus the mix I want slightly louder. This is kind of defeating the the purpose of the headphones I think the problem lies in the Audio MIDI set up utility with clock selection and resample boxes needing ticked or something....but I am far too much of a noob at that. Please help me work out how to get the MIx played through my speakers and only the deck I want to monitor being played through the headphones - It is neither the soundcards fault or the headphones as this works fine in Virtual DJ and Mixxx. thanks!