The use of an electronic circuit which uses the dynamic envelope of a sound to control an amplifier to which some different sound is connected. The amplified sound, usually from a synthesizer, takes on the envelope characteristics of the controlling sound. (Source - Richard Dobson (1992). A Dictionary of Electronic and Computer Music Technology. Oxford University Press.)
Bibliography: ASUAR, José Vicente (1972b). La segunda generación de música electrónica (The electronic music second generation)
BERMÚDEZ COSTA, Juan (1977). Nueva Generación de Instrumentos Musicales Electrónicos (The new generation of electronic music instruments)

