Can you make garageband pick up from the input jack only? I just got this new acoustic electric (Martin DC-16RGTE) and I got a audio input converter so I could play directly into the computer. The thing is, Garageband only seems to want to pick up the mic built into the eMac. Is there a way to switch the mic off and only have input from the input jack? Also, would I be able to use my computer speakers as "amps" using Garageband effects and all that? That would be aweseome but I doubt it's possible.