Hi everyone. I'd like to use my Genos as a master controller and sometimes use the Genos to control sound engines from 2 or 3 other keyboards, while using the accompaniment styles from Genos. I use a mic, and occasionally a friend might stop by with a guitar and mic. I'm currently not interested in recording; just playing live and jamming at home. The other keyboards do not have a MIDI thru port. Would I need both a MIDI interface and also a line mixer? I'm assuming I would take the audio signal from each keyboard, mike and guitar and run those signals through the mixer to the powered speakers. I have absolutely no experience with MIDI. Is there a better method? Any suggestions appreciated!