Hi, i accidentall discovered a really useful thing, i had muted all the tracks to a midi file except the drums, and was playing the other tracks with usb connected yamaha psr e413. I noticed the keyboard changed instrument types at various points and had modulation sometimes too.

Please can anyone explain what is happening?

I think one of the midi tracks is outputting to midi chanel 1 and this is selecting a different instrument on the keyboard.

My keyboard does not have a modulation wheel, so how can i create a midi track to trigger this mode?

Cheers rick