Re: adjusting gain within garageband by Burt Hazard on Jun 11, 2008 at 3:58:27 pm
Two places really...
Mac OS X:
System Preferences>Sound>External Microphone>Line In>Input Volume
GarageBand (well, you don't really set levekls with this step):
GarageBand>Preferences>Audio/MIDI>Sudio Input>Built in Audio
Basically the thing to remember is that the audio inputs on Macs are at line level, so you usually have to either preamp (boost) the signal or use a line-level mic. (Usually, I just use a four channel Radio Shack mixer.)