OK. I just want to do a simple thing. I want a mix with piano and strings. I want a slider(A-D) to fade between the two. Or two sliders, one assigned to the volume of each voice.
I recognize that there are several mixes made this way. However, I can't find how the controller is assigned to the volume, and I can't completely kill off the strings. They always leak through a little, apparently through the effects mix.
I can also find how to assign controllers in the effects, but nowhere else.