Sorry, I'm new to REW world and want to ask. I'd like to do an HT room calibration and looking for a good pairing to EMM-6 mic. Initially I tried Behringer 302USB as a mixer and quickly realized that it would only serve as an input or output but not both during calibration. I see that Q502USB model claims to be dual bus and has USB. So in theory this should provide parallel mic input and amp output through USB. Did anybody try it with REW or know if that will work? If not what would be a good alternative, ideally in the same price range?