I was thinking, since my Twin Reverb has 2 channels, I could buy an XLR to 1/4" cable and use my SM57 as a vocal mic through the normal channel, so it has it's own volume and then run my guitar into the Vibrato Channel, would this work? It wouldn't be for shows, just for band practices because there are a few parts where I sing, it doesn't need to sound great, just enough to hear myself.