La Monte Young in the context of "Minimalism"

Minimal music (also called minimalism) is a form of art music or other compositional practice that employs limited or minimal musical materials. Prominent features of minimalist music include repetitive patterns or pulses, steady drones, consonant harmony, and reiteration of musical phrases or smaller units. It may include features such as phase shifting, resulting in what is termed phase music, or process techniques that follow strict rules, usually described as process music. The approach is marked by a non-narrative, non-teleological, and non-representational approach, and calls attention to the activity of listening by focusing on the internal processes of the music.

The approach originated on the West Coast of the United States in the late 1950s and early 1960s, particularly around the Bay Area, where La Monte Young, Terry Riley and Steve Reich were studying and living at the time. After the three composers moved to the East Coast, their music became associated with the New York Downtown music scene of the mid-1960s, where it was initially viewed as a form of experimental music called the New York Hypnotic School. In the Western art music tradition, the American composers Moondog, La Monte Young, Terry Riley, Steve Reich and Philip Glass are credited with being among the first to develop compositional techniques that exploit a minimal approach. The movement originally involved dozens of composers, although only five (Young, Riley, Reich, Glass, and later John Adams) emerged to become publicly associated with American minimal music; other lesser known pioneers included Dennis Johnson, Terry Jennings, Richard Maxfield, Pauline Oliveros, Phill Niblock, and James Tenney. In Europe, the music of Louis Andriessen, Karel Goeyvaerts, Michael Nyman, Howard Skempton, Éliane Radigue, Gavin Bryars, Steve Martland, Peter Michael Hamel, Henryk Górecki, Arvo Pärt and John Tavener exhibits minimalist traits.

Terrence Mitchell Riley (born June 24, 1935) is an American composer and performing musician best known as a pioneer of the minimalist school of composition. Influenced by jazz and Indian classical music, his work became notable for its innovative use of repetition, tape music techniques, improvisation, and delay systems. His best known works are the 1964 composition In C and the 1969 album A Rainbow in Curved Air, both considered landmarks of minimalism and important influences on experimental music, rock, and contemporary electronic music. Subsequent works such as Shri Camel (1980) explored just intonation.

Raised in Redding, California, Riley began studying composition and performing solo piano in the 1950s. He befriended and collaborated with composer La Monte Young, and later became involved with both the San Francisco Tape Music Center and Young's New York collective, the Theatre of Eternal Music. A three-record deal with CBS in the late 1960s brought his work to wider audiences. In 1970, he began intensive studies under Hindustani singer Pandit Pran Nath, whom he often accompanied in performance. He has collaborated frequently throughout his career, most extensively with chamber ensemble the Kronos Quartet and his son, guitarist Gyan Riley.

Drone music (also known as drone-based music, or simply drone) is a minimalist genre of music that emphasizes the use of sustained sounds, notes, or tone clusters called drones. It is typically characterized by lengthy compositions featuring relatively slight harmonic variations. La Monte Young, one of its 1960s originators, defined it in 2000 as "the sustained tone branch of minimalism." Music containing drones can be found in many regional traditions across Asia, Australia, and Europe, but the genre label is generally reserved for music originating with the Western classical tradition. Elements of drone music have been incorporated in diverse genres such as rock, ambient, and electronic music.

Trio for Strings is a 1958 composition for violin, viola, and cello by American composer La Monte Young. It consists almost entirely of sustained tones and rests, and represents Young's first full embrace of "static" composition. It has been described as a central work of musical minimalism.

The Compositions 1960 are a set of text-based musical pieces written in 1960 by composer La Monte Young. Building on the work of John Cage, these pieces are unique in their emphasis on performance art and unconventional actions, such as releasing a butterfly into the room (#5), building a fire in front of the audience (#2), or pushing a piano into a wall (Piano Piece for Terry Riley #1). These compositions have been described as calling into question the definition of music.

The Theatre of Eternal Music (later sometimes called The Dream Syndicate) was an avant-garde musical group formed by La Monte Young in New York City in 1962. The first group (1962–1964) of performers consisted of La Monte Young, Marian Zazeela, Angus MacLise, and Billy Name. From 1964 to 1966, it consisted of La Monte Young (voice, saxophone), Marian Zazeela (voice, lighting), John Cale (viola), and Tony Conrad (violin), with sometimes also Terry Riley (voice). Since 1966, Theatre of Eternal Music has seen many permutations and has included Garrett List, Jon Gibson, Jon Hassell, Rhys Chatham, Alex Dea, Terry Jennings, and many others, including some members of the various 1960s groups. The group's self-described "dream music" explored drones and pure harmonic intervals, employing sustained tones and electric amplification in lengthy, all-night performances.

Archival recordings of the group's influential mid-1960s performances remain in La Monte Young's archive. None have ever seen official release following a dispute over compositional credit between Young and the pair of Conrad and Cale. Nonetheless, a 1965 bootleg recording removed from the archive by Young's first archivist, Arnold Dreyblatt, was controversially released in 2000 by Table of the Elements in CD as Day of Niagara. Other bootlegs of Theatre of Eternal Music have appeared online via file-sharing sites.

Anthony Schmalz Conrad (March 7, 1940 – April 9, 2016) was an American video artist, experimental filmmaker, musician, composer, sound artist, teacher, and writer. Active in a variety of media since the early 1960s, he was a pioneer of both drone music and structural film. As a musician, he was an important figure in the New York minimalist scene of the 1960s, during which time he performed as part of the Theatre of Eternal Music (along with John Cale, La Monte Young, Marian Zazeela, Terry Riley, and others). He became recognized as a filmmaker for his 1966 film The Flicker. He performed and collaborated with a wide range of artists over the course of his career.