As strange instruments go, this one might take the biscuit. 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 quickly away, ...

The piano, short for pianoforte, is a keyboard instrument made up of 52 white keys and 36 black keys. As well as being a solo instrument, the piano can be found playing a range of music in the ...

The expectation is that the keys will react differently to the touch than they do in a regular MIDI keyboard, an organ, or even a stage piano, and feel is often more important than sound.