Horacio Vaggione (born 21 January 1943) is an Argentine composer of electroacoustic and instrumental music who specializes in micromontage, granular synthesis, and microsound and whose pieces are often scored for performers and computers (mixed music).
He studied composition at the National University of Córdoba (1958–1961) and privately in Buenos Aires with Juan Carlos Paz (1960–1963), then at the University of Illinois with Lejaren Hiller and Herbert Brün (1966) where he first gained exposure and access to computers.
In 1983 he received a Doctorate in Musicology at the University of Paris VIII (thesis director: Prof. Daniel Charles).
In 1978 he moved to France, where he still resides, and began work at IMEB in Bourges, INA-GRM and IRCAM in Paris.
ICMA International Computer Music Association Commission Award (USA, 1992).