Zero Time is the debut album by British-American electronic music duo Tonto's Expanding Head Band, released on 15 June 1971 by Embryo Records. The album is a showcase for TONTO (The Original New Timbral Orchestra), a multitimbral, polyphonic synthesiser built by the two members of the band, Malcolm Cecil and Robert Margouleff, as a developed version of the Moog III synth in 1969. The duo began producing their own music together on the synth with the intention to push the machine's abilities, and their own abilities as musicians, to the limit. Recording their compositions in New York, they approached TONTO with no pre-conceived notions and intended to make music intrinsic to the synthesiser.