-- LINER NOTES --
SIDE ONE (21:00)
JOHN CAGE & LEJAREN HILLER
HPSCHD (1967-1969)
for harpsichords & computer-generated sound tapes
(publ. Henrnar Press Inc.)
ANTOINETTE VISCHER
Neupert Bach-model
harpsichord
(Solo 11)
NEELY BRUCE
Hubbard double harpsichord
with 17% Eltro time compression
(Solo VI)
DAVID TUDOR
Baldwin solid-body
electronic harpsichord
(Solo I)
Messrs. Cage and Hiller gratefully acknowledge the special assistance of Laetitia Snow, who wtote some of the
original computer programming for HPSCHD; James Cuomo, who helped prepare the original sound tapes with
ILLIAC II; Jaap Spek, who supervised the technical processing of the tape collage; and George Ritscher, who
engineered the final recording.
This recording of HPSCHD was made possible through use of facilities of the Experimental Music Studio and the
Department of Coniputer Science of the University of Illinois, Urbana.
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 this material was made possible through the Computing Center of the State University of New York
at Buffalo.
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The esthetic is what we think in the presence of the object. The artist's means are not esthetic but his thinking on them is; his esthetic thought prevails over the means to make a work of art. The rules of fugue or sonata form prophesy no esthetic consequence, except by the thought and doing of the artist. The sound object HPSCHD-"harpsichord" reduced to the computer's 6-letter-word limit becomes HPSCHD-may be the most elaborately defined sound composite so far achieved by deliberate formal composition. All "chance" factors occur within limits closely or widely permitted by the makers. Each part includes ideas from both composers; together they shaped it. Their thought, the object, and our thinking responses, in whatever relationship we hear it, decide our reaction to this work as a work of art.
HPSCHD consists of 51 electronic' sound tapes and 7 solo compositions for harpsichord. Writing in the avantgarde music magazine Source, Cage explains that the piece can exist as "a performance of one of seven live harpsichords and one to fifty-one tapes." The present record is a composition including 3 "live" solos across a composite of the 51 tapes. The source work, Introduction to the Composition of Waltzes by Means of Dice, is attributed to Mozart (K. Anh. C 30.01). For each measure of a 32-measure "empty" form (four 8-measure sections) the composer provides 11 alternative "composed" measures, the choice made by throw of dice. Measure 8 is always the same. With each section repeated the final form is 64 measures (AABBAABB), lasting one minute. This Dice Game repeated 20 times is Solo 11. Using now a computer-derived numerical system borrowed from the digital principle of I-ching (an ancient Chinese oracular or wisdom book), assemble another 64 measures of the same pattern, until another 20 successive assemblages fill 20 minutes. Solos Ill-VI each start with one realization of the Dice Game, progressively replacing the original choice of measures by: Solo 111, passages from Mozart piano sonatas, treble and bass together as written; Solo IV, the same, trebre and bass dissociated; Solos V & VI, associated and dissociated bass and treble measures from keyboard works by Beethoven, Chopin, Schumann, Gottschalk, Busoni, Schoenberg, Cage, and Hiller. Solo I is computer-written in 12-tone equal temperament on the same formulae which are used for the 51 sound tapes. Solo VII is anything of Mozart's chosen by the soloist, played as he wishes.
The 51 sound tapes contain music in equal-tempered scales of, successively, 5 to 56 tones in the octave, each tone deviating over a field of 129 (the half-interval up or down divided by 64 or the equal-tempered tone). Each tape is composed according to a series of programs: e.g., from simple repetitive tones and silences across a field to non-repetitive tones and complexly varied spaces. The patterns are overlaid and continually change, the more redundant being more clearly differentiated, the effect rather like individual trees merging into a forest. Other computer-formalized programs, for note sequence, time (in units), successive events, melodic "goals" (without cadence) and types (diatonic, chromatic, chordal arpeggiation), volume, and dynamics, are similarly intermixed. For the listener to this record a third program, KNOBS, enables him to alter the composite by increasing, decreasing, or eliminating some parts of the whole. On the record, Solo I1 (Dice Game) is in the left channel only, Solo VI in the right channel only, Solo 1 in both channels. "It's the first instance that I know of," Hiller comments, "where the home listener's hi-fi set is integral to the composition."
Each solo and each tape lasts slightly over 20 minutes, the length of this recorded performance. In "live" performance any part can commence at any time, and the length is determined by previous agreement. HPSCHD and the Second Quartet of Ben Johnston embody two extremes of esthetic experience. The multiple routines and subroutines of HPSCHD, although resulting from personal choices by the two collaborators, are In effect as impersonal as statistics or the Golden Section. The decisions concerning the intonational and melodic relationships of the Quartet are as personal as a fine handwriting-in many cultures as highly esteemed as any work of art. Neither work is "classic" or "romantic." Each is as free of the conventional indices for analysis as of the customary signals for emotion-the esthetic equivalent of an experiment in pure research.
Except the harpsichord solos, the sound medium of each work is composed in an intonation (system or scale of pitches) differing from the 12-note equal temperament of the piano. The macrotonal scales (5 to 11 pitches in the octave) and the microtonal scales (13 to 56 pitches in the octave) of
HPSCHD are microtonally varied systems of equal division of the octave, without close relationship to the tones and intervals of the overtone series. They are disparate points of sound lacking acoustical coordination and rich overtone sonority.
-- Peter Yates








Labels: Avant Garde Project, David Tudor, jodru, John Cage, Lejaren Hiller