Theremin

Theremin a monophonic, nonimitative *electrophonic instr. of the electronic type invented by Léon Thérémin in 1924 and first performed in public in 1928. The tone is generated by 2 supersonic oscillators, one of fixed frequency and the other of variable frequency. The latter is connected to a projecting metal rod that forms the frequency-determining element in conjunction with the proximity of the player's hand. Tone is produced by the heterodyne action of the fixed and variable oscillators…