I have a Roland UA-30 (a USB device that allows me to pull sound into my Mac from my stereo and pump it back into my stereo). I would like to redirct the sound to play over the computer rather than the stereo (actually the headphones, it is not like I prefer the computer's speakers to my stereo). This doesn't seem to work. I can play system sounds over either the stereo or the computer speakers... I can record from the stereo onto the computer. The sound coming out of the stereo is going though the computer (e.g., if the computer goes to sleep no sound comes out of the stereo). But unless I record the sounds and replay them the sound that originates in the stereo will not play over the computer's speakers. Does anyone know why this happens and how to change it?