"HPSCHD (1967-1969) for harpsichords and computer generated sound tapes" by John Cage and LeJaren Hiller was made available on vinyl by Nonesuch Records in 1970. Each copy of the LP included an individually generated computer printout called "Program (Knobs) for the Listener" and consisted of a series of random numbers representing knob positions at 5 second intervals for Left Volume, Right Volume, Left Treble, Right Treble, Left Bass and Right Bass. The purpose of these numbers was to allow the listener to create their own individual performance of HPSCHD by manipulating the controls of their hi-fi pre-amplifier.
In the performance I have uploaded here I have handed the job of manipulating the knobs over to Ableton Live. I entered the 1440 different numbers at 5 second intervals into the automation lanes of an effects rack I created to produce this performance.
More information including a scan of "KNOBS output sheet no.10929" available at my blog fidelitarium.blogspot.com
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