in order to make it work, you have to:
- create a route going from your keyboard to the onscreen keyboard (maybe you already have one)
- add a “Note as controller” filter to the route, changing notes to controller number 32 and also changing MIDI channel to 16 (@ClintGoss’s formula uses CC32 on channel 16)
- customize a button, inserting @TorstenH’s formula in the Caption field
Gabriel