OK, that was always the problem if a plug-in likes to do this for itself.
So, maybe a possibility would be for a plug-in to get a display string from the host with the information how a parameter is mapped, but not a MIDI-CC number.
Cheers,
Yeah, you are right, of course. I just wanted to point this out, but I agree plug-in internal MIDI learn is not a good solution from a technical point of view. But unfortunately, customers expect to have that…