Hi. I'm trying to record my acoustic guitar through my Shure SM81 mic, to my USB Dual Pre, to my computer. I've tried audacity and cubase, same stuff. When I press play, I get a lot of fuzzy feedback, can't hear guitar. If I turn up the gain REALLY high, I can hear the instrument a tiny bit. I don't know a lot about recording, so I have no idea what the issue could be. The mic, pre, or any of the cables could be faulty. It could be my sound card or my settings, but I have no trouble recording through my Digitech RP355. I have no idea where to start. Any idea?