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A theremin has a vertical antenna which controls pitch and a horizontal antenna which controls volume. As the hand moves toward or away from the pitch antenna, the pitch ascends and descends smoothly and continuously, like a slide whistle or a [[musical saw]]. The theremin's sound is a pure sine wave.

A theremin has a vertical antenna which controls pitch and a horizontal antenna which controls volume. As the hand moves toward or away from the pitch antenna, the pitch ascends and descends smoothly and continuously, like a slide whistle or a [[musical saw]]. The theremin's sound is a pure sine wave.

Although the theremin has its devoted fans, most listeners find its sound eerie and not particularly musical. It has been treated mostly as a novelty or a sound effect. Many science fiction movies have used theremins to evoke a futuristic or outer-space quality.  

Although the theremin has its devoted fans, most listeners find its sound eerie and not particularly musical. It has been treated mostly as a novelty or a sound effect. Many science fiction movies have used theremins to evoke a futuristic or outer-space quality. The theremin is also occasionally used in popular music, most notably by guitarist [[Jimmy Page]] in [[Led Zeppelin|Led Zeppelin's]] song "Whole Lotta Love"

==External links==

==External links==