A collection of Feldman compositions primarily for piano as recorded by his earliest interpreters: Cornelius Cardew, John Tilbury, David Tutor, Cantilene Chamber Players, and Feldman himself.

Perhaps the most iconic and "classic" of AMM albums, recorded at The Crypt in London in 1968 with AMM as the quartet of Cornelius Cardew on piano & cello, Lou Gare on saxophone and violin, Christopher Hobbs on percussion, Eddie Prevost on percussion, and Keith Rowe on guitar & electronics.