I'm considering the following setup to use Garageband '09 primarily as an electric guitar practice rig with limited recording. Alum iMac 2.8GHz USB Guitar Interface: M-Audio JamLab Personal Guitar System My main question, the answer to which may seem elementary to some, is, can I monitor the Garageband stacks and pedal effects in real-time, or are they applied only post-recording? From the Garageband tutorial, it appears it has an excellent array of effects. I'm trying to avoid buying a costly amp/effects. I have a 500W speaker system for my iMAC, so I think I'm good there.