By the way I assume your GOAL is to send mixer audio (keyboard, guitar, etc.) into Sonic Cell, then have Sonic Cell sum/merge (call it what you will) its audio with the MIXER stereo pair output and send the resultant Sonic Cell stereo pair to the PC over the USB? You did mention you want to use the SC as yoru PC audio I/O box.

So simplified flow would be: keyboard sounds -> mixer -> Sonic Cell - > PC (via USB not via SC audio outs into your PC MoBo sound card - assuming you have a analog audio input on MoBo).

Just verifying the intended final config.

BTW looking at manual pages 140 - 146'ish - seems that changes to internal routing, USB use, etc. has to be WRITTEN to SC memory (Fantom XR is similar it has to be power cycled to change its USB states).

In any case, looking at those pages leads me to think there could be some bad looped back audio potential when coupled with PC and MIXER if nto paying attention.

I realize nothing I just stated is helping you- I'm just thinking out loud and maybe it will trigger someone else to stumble onto or deduce actual problem and fix!

Last edited by Larry Kehl; 01/21/14 07:14 PM.