It’s an automatic piano with just four keys, and, as soon as you press a key to play a note, the whole set of four move ...

From concertos and sonatas, to nocturnes and trios, classical music would simply not be the same ... and Steinway’s model has been the standard ever since. An 88-key piano has seven octaves plus three ...

CG Matter modified his keyboard to a pattern of three white keys and a black key that automatically moves to the next notes ...