Debussy playing the piano

In 1913 Claude Debussy made a series of recordings using a device called the Welte-Mignon reproducing piano system. It recorded his key strokes and pedal work. Debussy was quite delighted by the quality of the reproduction.

You can read more about it at Steve's Debussy plays Debussy page and/or order, Claude Debussy: The Composer as Pianist (The Caswell Collection, Vol. 1), a CD of the recordings from Amazon.