I’ve run into this situation. I have a mostly dumb keyboard with no pots and faders. I also have an x-touch compact with quite a lot pots and faders. The xtouch talks on channel 16.
Is there a way (in the standalone application) to kind of make this whole port “global”? So that anything that goes through it is received on all channels? (The idea is that I could play the notes on the MIDI keyboard, and simultaneously learn MIDI CC on the xtouch to control instrument parameters.)