Ok thanks, I have a Reface CP on the way and I intend on getting a second keyboard . You gave informative answers.

Yes I want C2 to play F#2, this makes it easier for me to play in keys that are in my vocal range. I was hoping internally reset the CP tuning down...

Can you please give me a few examples how can transmit a MIDI Parameter Change message .I would like to be able to transpose down 6 semitones. Would ...