condition (record/cover): EX- / VG+ (light sticker removal residue and minimal creasing near edges)

Regular gategold sleeve (not Unipak). Hand-written run-out etchings.

The Columbia recording was made in April-May 1968 at the legendary 30th Street Studio in New York, produced by David Behrman (the composer, then a CBS editor curating the Music of Our Time series of avant-garde releases). Recorded over three sessions (29 April, 1 May, 2 May) with eleven musicians from the Center of the Creative and Performing Arts at SUNY Buffalo: among them Jon Hassell on trumpet, David Rosenboom on viola, Edward Burnham on vibraphone. Riley plays soprano saxophone and leads the ensemble; the pulse part (constant high Cs on piano, Behrman's contribution to the score) was added during the sessions.

In C (1964) consists of fifty-three short melodic modules played in sequence by any number of musicians at their own pace. Premiered at the San Francisco Tape Music Center on 4 November 1964 with Reich, Pauline Oliveros and others in the ensemble. The 1968 Columbia LP gave minimalism its first commercial release. Liner notes by Paul Williams, then editor of Crawdaddy. Original Unipak gatefold sleeve with the score printed inside. Added to the National Recording Registry in 2022.