Question: Switched-On Rock is an album of instrumental cover songs, popular songs from the mid-to-late-1960s, performed on the Moog modular synthesizer in an exaggerated electronic style, one of a spate of albums which capitalized on the success of 1968's "Switched-On Bach" by which American musician and composer, best known for her electronic music and film scores?
Context: Switched-On Bach is the first studio album by the American musician and composer Wendy Carlos, released under her birth name Walter Carlos in October 1968 by Columbia Records.  Produced by Carlos and Rachel Elkind, the album is a collection of pieces by Johann Sebastian Bach performed by Carlos and Benjamin Folkman on a Moog synthesizer.  It played a key role in bringing synthesizers to popular music, which had until then been mostly used in experimental music. A Moog modular synthesizer is a monophonic analog modular synthesizer developed by the American electronic instrument pioneer Dr. Robert Moog.  Many different models were manufactured by R.A. Moog Co. (Moog Music after 1972) from 1965–80. Richard Lainhart (February 14, 1953 – December 30, 2011) was an American composer of electronic music that combines analog and digital instrumentation with extended performance techniques derived from traditional acoustic instruments.  Lainhart's music is particularly associated with the renaissance of modular analog synthesis, and frequently performed with a Buchla 200e modular synthesizer controlled by a Haken Audio Continuum multidimensional keyboard controller. The Notorious Byrd Brothers is the fifth album by the American rock band the Byrds and was released in January 1968 on Columbia Records ("see" 1968 in music).  Musically, the album represents the pinnacle of the Byrds' psychedelic experimentation, with the band blending together elements of folk rock, psychedelic rock, country music, electronic music, baroque pop and jazz on many of the songs.  Of these disparate styles, the subtle country and western influences evident on a number of tracks pointed towards the full-blown country rock direction that the band would pursue on their next album.  In addition, "The Notorious Byrd Brothers" saw the band and record producer Gary Usher making extensive use of a number of studio effects and production techniques, including phasing, flanging, and spatial panning.  The Byrds also introduced the sound of the pedal steel guitar and the Moog modular synthesizer into their music for the first time on the album, making it one of the first LP releases on which the Moog appears. Switched-On Brandenburgs is a 1979 double album by Wendy Carlos.  It was the seventh album released by Carlos, and the fourth album in her project of classical music which also included "Switched-On Bach" (1968), "The Well-Tempered Synthesizer" (1969), "Switched-On Bach II" (1974), and "Switched-On Bach 2000" (1992). Lothar and the Hand People were a late-1960s psychedelic rock band known for its spacey music and pioneering use of the theremin and Moog modular synthesizer. The Well-Tempered Synthesizer is the second studio album from the American musician and composer Wendy Carlos, originally released under her birth name, Walter Carlos, in November 1969 on Columbia Masterworks Records.  Following the success of her previous album, "Switched-On Bach" (1968), Carlos proceeded to record a second album of classical music performed on a modular Moog synthesizer from multiple composers, including Johann Sebastian Bach, Claudio Monteverdi, Domenico Scarlatti, and George Frideric Handel.  Its title is a play on words from Bach's set of preludes and fugues named "The Well-Tempered Clavier". Wendy Carlos (born Walter Carlos; November 14, 1939) is an American musician and composer 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. Switched-On Rock is an album of instrumental cover songs, popular songs from the mid-to-late-1960s, performed on the Moog modular synthesizer in an exaggerated electronic style.  It was one of a spate of albums which capitalized on the success of 1968's "Switched-On Bach" by Wendy Carlos.  "Switched-On Rock" was produced by Norman Dolph who also wrote the liner notes.  Dolph worked in the studio with colleagues Kenny Ascher and Alan Foust; they billed themselves as the Moog Machine for this and one more project.  The album reached number 170 on the Billboard Top 200. Pierluigi Giombini (born 11 December 1956 in Rome) is an Italian songwriter and record producer.  He was born in a family of musicians: his father Marcello Giombini was a composer of secular music and film music as well as being interested in electronic music.  His grandfather was a music professor who specialized in the oboe and also played in orchestras. Giombini therefore had been introduced at an early age to the classics and progressed to study piano and composition at the conservatory.  While he was studying classical music at the Conservatory in Rome, he also listened to 1970s progressive rock groups; Emerson, Lake & Palmer in particular and Wendy Carlos.  It was Wendy Carlos' "Switched-On Bach" records that inspired him to study and create the synth sounds that he later used on his hit records in the 1980s.  Even now he still uses hardware and software synths for his current projects such as 'Web'.
Answer: Wendy Carlos