I want to use BIAB as a backing track for my piano. However the the piano is not correctly tuned to C or even a semi tone below or above. It is somewhere between C and b flat.
Is it possible to transpose a song in BIAB to a frequency rather than a real key? I know I can transpose by a semitone. But the piano is still out of tune to the new key.
Obviously I could get the whole piano re tuned. But that is a last resort (cost).
Thanks in advance