LFO are an English techno outfit on the Warp Records label. LFO were one of the pioneers of the bass-heavy techno music of the late 1980s to mid-'90s. Originally the band was comprised of Gez Varley, Martin Williams a.k.a. DJ Martin and Mark Bell. LFO is now Bell alone.
The band's name is derived from the abbreviation for the term low frequency oscillation, a synthesis technique widely used in electronic music.