Thanks for helping me out Eric! When I set the Echo Back to Thru the external synths receive midi on their channel but not the internal sounds. All midi channels play piano except 10 which are drums. I have several tracks using the internal sounds and other sending midi to synths. How can I set the midi input channel for each track so I send midi to qy-700 internal sounds on multiple channels? I use pattern mode only, do I need to adjust something in 'OutCh.' (Sequence Out Channel) or in 'Patt.TR' (Pattern Out Channel) where I set the midi ouputs for the external Synths.?