The manual seems to imply that the RCA AUX outs will only output computer sound (and not mics)... is that accurate? In particular, although not my main use, I'd like to be able to go USBpre2>M10 via the RCAs to a miniplug. Has anyone done/tested this? Is there a DIP switch that needs to be changed in order to make that happen? I know I could go XLR>mini as well, but I don't have an adapter for that, and do have several for RCA.