I saw something that brought me back to high school days…a cassette tape player piano system!  See the vid below as well as the Wikipedia description of it.

“Pianocorder was founded by Joseph Tushinsky. The Pianocorder was the first modern mechanical player piano made for the public that used solenoids to power the keys. Later, it was bought out by Yamaha Disklavier and discontinued and is known today as the Yamaha Disklavier.” –  http://en.wikipedia.org/wiki/Steve_Allen