Electronic instruments

Electronic instruments generate tones through electricity. Synthesizers, [drum machine]?s and [electric organ]?s are all electronic instruments.

Dr. Moog? introduced the first [electric organ]? with his Moog? synthesizer. This instrument used a series of tone generators with keys that would adjust the tone generators' pitch. To gain enough money to engineer this synthesizer, Moog? sold Theramin?s, a very peculiar instrument that uses no switches to trigger pitch or volume, relying instead upon a pair of antennae and the variable capacitance occasioned by the presence of the instrumentalist's hands.

French composer and engineer [Edgar Varese]? created a variety of compositions using electronic horns, whistles, and tape. Most notably, he wrote [Poem Electronique]? for the Phillips building in the Brussels World Fair in 1951.