Is it possible?
I already downloaded the phatty tuner but I can’t invert the root note.
Alternatives?
Thanks
Hi Worberino, welcome to the forum!
Other than external MIDI or CV process, I do not think it’s possible.
CP-251 and some chords and fine adjustment may do the job.
A MIDI processor and a smart patch will do the job.
Hello!! 
Anyway I’m a newbie, can you explain me how? I don’t own the CP-251 but I kinda need it anyway.
Thank you
Well, with the CP-251, I guess using its mixer can help as it allows inverting signals and applying offsets. I think you’re almost there with only that and some fine tuning.
About MIDI, it’s up to the software/MIDI procesor you’ll use. I don’t have more precise idea as I do not use any computer for music -except for recording it.
Anybody, any idea?