Hello Everyone,thanks for debating my problem with muting midi on the sd2, I edit midi files on my pc with logic audio, then trigger various midi modules to get the sounds out, i use chan14 for midi lighting and reverb switching, chan9 for guitar patches, chan5 for M1, chan1 for sampler and chan2 for dmx lighting, then i dump the file to floppy(yes i know!!) then use a yam mdf2 sequencer to spit it out for live work, so i need to mute these chans on the ketron to stop the other chans recieving spurious program changes etc.i've used sound canvas and korg M1 modules for years and am able to mute these easily internally, the ketron sounds way better so I would like to use this now...sorry 2 go on a bit....my head hurts now