An 88-key piano has seven octaves plus three lower notes (B, B flat and A) below the bottom C. It has 52 white keys and 36 black keys (sharps and flats), with each octave made up of seven white keys ...

Born in Buenos Aires, Argentina in 1942 into a Russian Jewish family, Daniel Barenboim was a piano prodigy who first made his name in the 1960s as a performer of the classical keyboard repertory.