Theremin: Led Zeppelin untold Secret

This is a really weird musical instrument. The Theremin is one of the earliest fully electronic musical instruments. It was invented by Russian inventor Léon Theremin in 1919. It consists of two metal antennas that sense the relative position of the player's hand and produces an eerie sound heard on classic tracks by Led Zeppelin and the Rolling Stones. Léon Theremin went on to invent the world’s first drum machine and even used his audio know-how to build spy equipment for the KGB.

Theremin controlled without physical contact by the thereminist (performer). This what makes Theremin really unique.The musician stands in front of the instrument and moves his or her hands in the proximity of two metal antennas. The distance from one antenna determines frequency (pitch), and the distance from the other controls amplitude (volume). Most frequently, the right hand controls the pitch and the left controls the volume, although some performers reverse this arrangement.