Why not use the ALT 3/4 BUSS from thats set up on the Mute switch or one of the other busses? Then you can simply use the HiZ input with a stereo cord. Use the preamps on the Mackie for the guitar and the mic, pan them left and right then press the MUTE (or buss assign) button to buss it to the Kurzweil.(posted 9258 days ago)Hope this helps, Mike Martin