Nonesuch Records H-71224 (LP)

Cage & Hiller: HPSCHD / Johnston: String Quartet No.2

Side one:
John Cage & Lejaren Hiller: HPSCHD (1967-69) 21:00

Side two:
Ben Johnston: String Quartet No.2 (1964) 14:57
    Light And Quick: With Grace And Humor 2:44
    Intimate, Spacious 5:21
    Extremely Minute And Intense; Not Fast — Quick, Mercurial — Very Fast, With Suppressed Excitement — Quick — Extremely Minute 6:40

Antoinette Vischer, Neupert Bach-model harpsichord (Solo II); Neely Bruce, Hubbard double harpsichord with 17% Eltro time compression (solo VI); David Tudor, Baldwin solid-body electronic harpsichord (Solo I).
The Composers Quartet: Matthew Raimondi and Anahid Ajemian, violin. Bernard Zaslov, viola. Seymour Barab, cello.

"The computer-output sheet included in this album is one of 10,000 different numbered solutions of the program KNOBS. It enables the listener who follows its instructions to become a performer of this recording of HPSCHD. Preparation of the material was made possible through the Computing Center of the State University of New York." (from the sleeve-notes).

Recorded at the Experimental Music Studio, University of Illinois, Urbana. No dates mentioned.
Original Computer Programming for 'HPSCHD': Laetitia Snow
Engineer for 'HPSCHD': George Ritscher
Preparation Of Original Sound Tapes for 'HPSCHD': James Cuomo
Technical Processing Of The Tape Collage for 'HPSCHD': Jaap Spek
Art Director: William S. Harvey
Cover Design: Hess and/or Antupit
Engineer for side B: Marc J. Aubort
Coordination: Teresa Sterne
Liner Notes: Peter Yates
Also released on Cassette: Nonesuch Records N5-1224
Currently available on CD on a Japanese re-release: Nonesuch WPCS-5133
LP released in 1969

Sources: Orignal LP, Discogs website and University of California, Berkeley Music Library catalog