Wendy Carlos (born Walter Carlos; November 14, 1939) is an American physicist, composer, and keyboardist best known for her electronic music and film scores. Born and raised in Rhode Island, Carlos studied physics and music at Brown University before moving to New York City in 1962 to study music composition at Columbia University. Studying and working with various electronic musicians and technicians at the city's Columbia-Princeton Electronic Music Center, she oversaw the development of the Moog synthesizer, then a relatively new and unknown keyboard instrument designed by Robert Moog.
Carlos came to prominence with Switched-On Bach (1968), an album of music by Johann Sebastian Bach performed on a Moog synthesizer which helped popularize its use in the 1970s and won Carlos three Grammy Awards. Its commercial success led to several more keyboard albums from Carlos of varying genres including further synthesized classical music adaptations and experimental and ambient music. Carlos composed the score to two Stanley Kubrick films, A Clockwork Orange (1971) and The Shining (1980), and Tron (1982) for Walt Disney Productions.
Trumpet Voluntary is the name given to some English keyboard pieces from the Baroque era. A trumpet voluntary is most commonly played on the organ using the trumpet stop, hence the name. Trumpet voluntaries usually consist of a slow introduction followed by a faster section with the right hand playing fanfare-like figures over a simple accompaniment in the left hand. In some instances, the Trumpet is replaced by the Cornet stop, or even a Flute stop. Echo effects are also used sometimes.
The most celebrated trumpet voluntary is the Prince of Denmark's March, a composition by Jeremiah Clarke written circa. 1700. It is properly a rondo for keyboard and was not originally called a trumpet voluntary. It is very popular as wedding music and was played at the 1981 wedding of Charles, Prince of Wales, and Lady Diana Spencer. This piece, particularly in a well-known arrangement for trumpet, string orchestra and organ by Sir Henry Wood, was incorrectly attributed for years to Henry Purcell. It is now known to have been the work of Clarke.