There are 36 black keys on a standard 88-key piano. The black keys represent sharps and flats. A standard piano with 88 keys has 52 white keys. The white keys are the natural notes.

ROLI, however, has other ideas: its new ‘Piano’ is a 49-note light-up controller keyboard that’s designed to be used with its previously announced Airwave hardware and piano learning software. The ...

ROLI Piano delivers a 49-key expressive keyboard complete with full-sized, full-plunge depth keys that feel and sound phenomenal. These larger keys feature ROLI's unique, patented BrightKey technology ...

The new Roli Piano features personalized AI guidance underneath the 49-key, $800 keyboard ... and then lights the keys to guide you through notes and chords. Roli's instruments also come with ...