AMM is a British free improvisation group that was founded in London, England, in 1965. The group was initially composed of Keith Rowe on guitar, Lou Gare on saxophone, and Eddie Prévost on drums. The three men shared an interest in exploring music beyond the boundaries of conventional jazz, as in free jazz and free improvisation. AMM has never been popular but has been influential in improvised music. Most of their albums have been released by Matchless Recordings, which was run by Eddie Prévost. In a 2001 interview, Keith Rowe was asked if "AMM" was an abbreviation. He replied, "The letters AMM stand for something, but as you probably know it's a secret!"

"AMM music may initially seem impenetrable, but it sure as hell penetrates you. Soon the desired state is instilled in the listener; a rapt vacancy somewhere between supreme concentration and utter absentmindedness." - Melody Maker

On AMMMusic, long tones sit next to abrasive thuds, the howl of uncontrolled feedback accompanies Cardew's purposeful piano chords, radios beam in snatches of orchestral music. AMM's clearest break with jazz-based improvisation concerned the idea of individuality. Initially through an engagement with eastern philosophy and mysticism and later though a politicized communitarianism, AMM sought to develop a collective sonic identity in which individual contributions could barely be discerned. In the performances captured on AMMMusic the use of numerous auxiliary instruments and devices, including radios played by three members of the group, contribute to the sensation that the music is composed as a single monolithic object with multiple facets, rather than as an interaction between five distinct voices." - Francis Plagne

Eddie Prévost / percussion, Keith Rowe / electric guitar and transistor radio, John Tilbury / Piano