I'm a singer songwriter and I just recently started looping beat boxing behind my guitar, and looping my guitar on top of that using the Boss RC 20. The one problem is that when I'm performing at a venue the only way to control the levels of the guitar and mike separately is through the looping station on stage, and the sound guy off stage must treat the guitar and mike levels as one. This means that I have to control the levels on stage and often the balance is off. Does anyone know if there is a way on the Boss RC 20 to hook the guitar and vocals up separately into a sound system still as part of the looping station, or if there are other performing loop stations that are easier to use for this purpose? I hope any of this makes sense. Thanks. Happy Thanksgiving.