Hey I have a EMU 0404 audio interface with a white macbook 2.1 gHz. All I do is have the guitar 1/4" into the EMU and the EMU hooked up the macbook. But I always get terrible sound quality of the guitar when I play it through Garage Band or Guitar Rig. Its noisy and fuzzy. However when I hook up a microphone it records and sounds beautiful with no noise. Is there some-kind of setting that I have to adjust to make my guitar play clean through the EMU and mac?