Please check internet, this is a FAQ. Good Pieces for 5 octaves I have a 5 octave piano, recommend sheet music I can play. • /r/piano In addition there are quite some pieces that have been arranged to fit smaller keyboards. read more
Similarly, early harpsichords had between 48 and 61 keys. So much of Bach's harpsichord pieces can be played on a 61 key keyboard. read more