I’ve been using Chordz and midiChords in my 3-piece band for years, and since my bass player is not a keyboardist, it is easy for him to use one note to play difficult chords while I switch to a guitar lead. I can also control chord progressions with my sustain pedal while I play guitar. @dave_dore helped me set it up with a rack he created. Here is the full discussion from 2020, quite amazing!