Hey! Newbie here! I'm having trouble with an interface I recently bought for about a hundred dollars at a local music store. It fit all of my qualifications; I really just need an XLR cable for my Shure SM-57 (that I use purely for vocals) and a 1/4th inch cable for my guitar, bass and the box I use for drum mics (long story, not apart of this problem). I'm using Logic Pro 9 for my software. I'm using this audio interface: http://www.musiciansfriend.com/pro-audio/lexicon-alpha-usb-desktop-recording-studio]Lexicon Alpha USB Desktop Recording Studio | Musician's Friend[/url] and for the most part it's worked well. I've just finished recording about 60 hours work of guitar and bass tracks, and moved on to the vocals for this track. I'm trying to record a solo album because my grandma is in the hospital and always wanted to hear me play by myself, and I told her I'd do it. Now to the problem: The 1/4th inch cable records great, so then I unplugged the guitar and cable, and switched to the SM-57 (plugged in directly with an XLR cable). At first it looked like it wasn't recording, but on closer inspection, the level was moving up ever so slightly (not enough to hear unless you were listening really hard). When I plug in to the direct output on the Alpha Lexicon, the mic sounds fine (great in fact, much better than how I was recording before). I know it isn't a problem with the gain on it, because the 1/4th inch worked great and it sounded amazing. I've tried everything I can think of but any suggestions are helpful! TL;DR: Alpha Lexicon interface works fine, except the XLR port, which is so quiet I can't even hear it, and it barely registers. I've been pulling out my hair trying to figure this out.