I'm new to the Mac OS. I open Garageband and click "New Podcast Episode." The podcast creator opens, I click record by male voice, say something, click record button again to stop recording, press play but hear nothing. What am I doing wrong? I'm trying to use the built in mic, I tested it in the sounds section of System Preferences and everthing seems to be ago except for Garageband picking up my voice. Help please!