Known for his mastery of 18th- and 19th-century music and for being one of the greatest fortepiano players and teachers.
He was a 1957 graduate of Bard College and a doctoral graduate of the University of Illinois in 1968.
He accepted a professorial position at Cornell University where he was named to the Frederick J. Whiton chair in 1990.
He was born into a showbiz family: his father George was a producer/writer/director, and his older brother Bruce was a film and TV director.
He collaborated with six former students on recording Ludwig van Beethoven's complete piano sonatas.