Wendy Carlos (Born Walter Carlos, November 14, 1939) is an American composer and musician. She was born in Pawtucket, Rhode Island. She is known as one of the first people to use electric instruments to make music. In 1968, she released her music album "Switched on Bach". This album used many new electric instruments including the Moog Synthesizer. She also did the music for movies. These include A Clockwork Orange, The Shining, and Tron. In 1972, Carlos had a medical operation to change her body from male to female.