I have recorded a guitar track by playing guitar into my microphone. The problem is that it is not very loud when I listen back in GarageBand. My vocals also into the same mike is ok. Does this mean that I need to plug in guitar. I would like to avoid doing this as my guitar is unable to do this. The volumes are all turned up so I don't understand. Could it be that I need a better mike? Oh, maybe I should mention that I have the iMac G5. I've gone into system prefs and clicked on line in.