Awesome complete prepared piano recordings by Giancarlo Simonacci. The prepared piano, which Cage invented in the early 1940s, was such a brilliant invention that no one would have blamed him for spending the rest of his life writing for it. A lesser composer would have done that; Cage being Cage he spent the best part of a decade creating a sublime body of work for it and then promptly moved directly onto his next preoccupation - indeterminacy - and never wrote for the prepared piano again