The CS6X doesn't send midi out when I turn on or turn off the voice.
So with 4 buttons I can do it, you think? Any hints how?
I can probably have a partial solution with a knob with 4 named ticks. Then it would be like 1 1,2 1,2,3 and 1,2,3,4. But I would rather have a solution in which I can turn off whatever voice I want.