Occasionally we want to play a song in a different key, and when the new key is a bit higher it is easy for me since I just put a capo on my guitar.

However, for practising, I need iRP to take the capo into account when producing the sound. For example, when the capo is on the 2nd fret, I want to see a C but hear a D.

Am I overlooking a trivial way to make iRP do this?