So yesterday my band was about ready to record when i had a problem with garageband. Im using a Multimix w/ USB and just plugging the usb cord straight into the front port of the tower on my Mac G5. But when i hit the record button, the singal spike cliped, the went back to a plain signal, then it spike cliped again but this time it held it out until i hit stop. (its very confusing) But then i tried a different port. It worked for a while, but then it did it again. I finally tried using a hub even though you are not susposed to and it worked fine. I just dont get whats happening. I think my multimix is broken, do u think guitarcenter will replace it if it is?