I have an issue with my soundcard, It's only got one channel and for any kind of mixing you obviously need two channels. It's a Mac, so i can't just take it apart, and I don't think there's an upgrade for my computer model, so is it possible to get an external soundcard and for my computer using USB, with it overiding my current soundcard. And if it is can anyone recomend me a good 2 channel soundcard.

___________________
if i had a hammer...