Drum loops

In electroacoustic music, a loop is a repeating section of sound material. Short sections of material can be repeated to create ostinato patterns. A loop can be created using a wide range of music technologies including digital samplers, synthesizers, sequencers, drum machines, tape machines, delay units, or they can be programmed using computer music software.

While repetition is used in the musics of all cultures, the first musicians to use loops were electroacoustic music pioneers such as Pierre Schaeffer, Halim El-Dabh (Holmes 2008, p. 154), Pierre Henry, Edgard Varèse and (Decroupet and Ungeheuer 1998, pp. 110, 118–19, 126). In turn, El-Dabh's music influenced Frank Zappa's use of tape loops in the mid-1960s (Holmes 2008, pp. 153–54), and Stockhausen's music influenced The Beatles to experiment with tape loops; their use of loops in early psychedelic works (most notably "Tomorrow Never Knows" in 1966 and the avant-garde "Revolution 9" in 1968) brought the technique into the mainstream. The stereo version of The Kinks' 1967 song "Autumn Almanac" (which appears on the 1972 compilation The Kink Kronikles) also features a psychedelic tape loop during the fade-out.