The hypnotic, undulating cadence of the theremin has graced the soundtrack of a number of horror film soundtracks -- and at least one classic rock and roll tune, the Beach Boys' "Good Vibrations"). But the instrument has not inspired a large contingent of full-time adherents; it has mostly been used as a means of generating sound effects. The instrument's inventor, the Russian inventor Leon Theremin, envisioned his creation as a serious musical instrument, however. The theremin's preeminent virtuoso is by most accounts the first, a contemporary of Theremin himself named Clara Rockmore. She developed a formidable technique on the inherently microtonal instrument; in her hands, the theremin was capable of playing almost in equal temperament. Born Clara Reisenberg, Rockmore was a child prodigy on the violin, and was accepted to the Imperial Conservatory of Music in St. Petersburg, Russia at the age of four. Rockmore moved to the United States while still a child, settling in New York City; from 1925 to 1928 she studied with the celebrated Hungarian violinist Leopold Auer. Muscular and joint problems threatened her career as a violinist, but she fortunately made the acquaintance of Theremin in New York, and worked with him between 1932 and 1934. From that point, the theremin, which is played without direct physical contact, became her primary instrument. Rockmore gave a legendary public performance on the theremin at New York's Town Hall on October 27, 1938, at which she played, among other works, a transcription of Franck's Violin Sonata. She went on to a distinguished career as an orchestral soloist and recitalist. Rockmore made what is arguably her most historically significant recording in 1977, The Art of the Theremin -- Clara Rockmore, on which she performed transcriptions of compositions by Ravel, Stravinsky, and Rachmaninov, to name just a few. A trend toward the revival of early electronic instruments in the 1980s caused the spotlight to fall on her anew; electronic music pioneer Robert Moog helped to bring about the filming of a television documentary about Rockmore, The Art of the Theremin, which aired on the CBS network. She was also featured in the 1994 film, Theremin: An Electronic Odyssey.