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Carolee Schneemann: Illinois Central. 1968. "I've always thought that I'm creating a sensory arena... we must deal directly with the audience itself as performers." Photo: Peter Holbrook.

Centers: A Ritual of Alignments, as performed by Milton Cohen in his Space Theatre. 1969.

Film imagery was basic to the performance. Cohen adapted projectors to handle twelve-foot film loops projected sequentially on the fanlike screens, making one round every twenty seconds. Simultaneously various geometrical target patterns were rear-projected onto the core. The audience is seated on revolving stools in the twenty-foot area between the projection system and the screen. Their attention is polarized between the gyrating film and the free-floating slide imagery registering on walls and screens that define the total enclosure.

The multi-channeled sound is electronic, instrumental, and vocal, and moves in complex trajectories from speaker to speaker. The effect, according to Cohen, "is one of sound in flight; sound seeking target." This theme of seeking out the target is carried over into the visuals through the manipulation of the projection console in a discrete sequence of maneuvers that search out the center. "When and if this centering is won," Cohen explains, "the performance may proceed to the next film loop. But also ways must be discovered for other performers (live dance, live music, etc.) as well as the audience to contribute to the audiocentric and luminocentric probes. Ultimately there must be a common voyage for all to that identifying place which describes at once the center and the whole."

The ONCE group has explored structures other than Space Theatre. Perhaps the best known American intermedia theatre event was their Unmarked Interchange (1965), in which live performers interacted outrageously with the Fred Astaire-Ginger Rogers film Top Hat projected on a huge screen inset with movable panels, louvers, and large drawer-like sections. While a couple dined by candlelight at a table in one corner of the screen, a man read into a microphone from the pornographic novel, Story of 0, at the opposite end of the projection surface; periodically a girl walked across a catwalk in the center of the screen and hurled custard pies in his face. In another opening, a man played a piano. And over all of this Fred and Ginger danced their way through 1930's Hollywood romantic escapism.

John Cage and Ronald Nameth: HPSCHD

ONCE Group: Unmarked Interchange. 1965. Live performers interact with projection of Top Hat, starring Fred Astaire, Ginger Rogers.

Photo: Peter Moore.

Computer-composed and computer-generated music programmed by John Cage and Lejaren Hiller during 1967-69 was premiered in a spectacular five-hour intermedia event called HPSCHD ( computer abbreviation for Harpsichord) at the University of Illinois in May, 1969. Computer-written music consisted of twenty-minute solos for one to seven amplified harpsichords, based on Mozart's whimsical Dice Game music (K. Anh. C 30.01), one of the earliest examples of the chance operations that inform Cage's work. Computer-generated tapes were played through a system of one to fifty-two loudspeakers, each with its own tape deck and amplifier, in a circle surrounding the audience. Cage stipulated that the compositions were to be used "in whole or in part, in any combination with or without interruptions, to make an indeterminate concert of any agreed-upon length."

Milton Cohen's Space Theatre, Ann Arbor, Michigan. 1969. Sight and sound move in complex trajectories through a maze of shifting, revolving, faceted surfaces, seeking the target.

John Cage and Ronald Nameth: HPSCHD. 1969. Assembly Hall, University of Illinois, Champaign-Urbana. Fifty-two loudspeakers, seven amplified harpsichords, 8,000 slides, 100 films. Photo: courtesy of Ronald Nameth.

The university's 16,000-seat Assembly Hall in which the event was staged is an architectural analogue of the planetary system: concentric circular promenades and long radial aisles stretching from the central arena to the eaves of the domed ceiling. Each of the forty-eight huge windows, which surround the outside of the building, was covered with opaque polyethylene upon which slides and films were projected: thus people blocks away could see the entire structure glowing and pulsating like some mammoth magic lantern.

Over the central arena hung eleven opaque polyethylene screens, each one hundred feet wide and spaced about two feet apart. Enclosing this was a ring of screens hanging one hundred and twenty-five feet down from the catwalk near the zenith of the dome. Filmmaker and intermedia artist Ronald Nameth programmed more than eight thousand slides and one hundred films to be projected simultaneously on these surfaces in a theme following the history of man's awareness of the cosmos. "The visual material explored the macrocosm of space," Nameth explained, "while the music delved deep into the microcosmic world of the computer and its minute tonal separations. We began the succession of images with prehistoric cave drawings, man's earliest ideas of the universe, and proceeded through ancient astronomy to the present, including NASA movies of space walks. All the images were concerned with qualities of space, such as Méliès' Trip to the Moon and the computer films of the Whitney family. The people who participated in HPSCHD filled in the space between sound and image."

Seven amplified harpsichords flanked by old-fashioned floor lamps stood on draped platforms on the floor of the central arena beneath the galaxy of polyethylene and light. In addition to playing his own solo, each harpsichordist was free to play any of the others. Each tape composition, played through loudspeakers circling the hall in the last row of seats near the ceiling, used a different division of the octave, producing scales of from five to fifty-six steps. Only twice during the five-hour performance were all channels operating simultaneously; these intervals were stipulated by Cage.

Nameth has collaborated in several intermedia performances in addition to making his own computer films and videographic films, as well as conventional cinema such as Andy Warhol's Exploding Plastic Inevitable. In 1967 he worked with Cage in the preparation of Musicircus, an eight-hour marathon of sight and sound involving nearly three thousand persons— musicians, musical groups, orchestras, and composers in addition to a participating "audience"— all making music together.

In 1968-69 Nameth worked with Salvatore Martirano and Michael Holloway in a music/theatre/film presentation titled L.'s G.A.

(Lincoln's Gettysburg Address), which traveled throughout the United States and Japan. Described as a mixed-media event "for gas-masked politico, helium bomb, three 16mm. movie projectors, and two-channel tape," L.'s G.A. was simultaneously a showcase for Martirano's electronic tape compositions, Nameth's multiple-projection cinema, and Holloway's poetry. Nameth employed video imagery for his cinematic triptych As the World Turns, which he described as "the visual counterpart of Martirano's music." Depending on the physical limitations of the performance space, Nameth's film was projected in the form of two smaller images side by side within a larger image, all three images adjacent to one another, or all three superimposed over one another.