I am running my guitar and mic through an Apogee Duet into an iMac. I'm new to recording and to Macs. Is there a way to run the sound through my computer speakers either live or during playback? I have only been able to listen live through my headphones, which may be the intended function to avoid feedback. However, I am also stuck with using headphones during playback, and that's frustrating. I have found that if I pull the firewire cord, then it will play through the speakers, but that is a pain. Plus, sometimes that causes an error and shuts down garageband. Thanks for any insight.