I of IV (1966)

Composed in 1966, this work is a good example of Oliveros' earlier electronic music. A configuration of tape recorders is cross-patched into each other, each recorder having a magnetic tape loop running on it. This makes for a type of "automatic generation" system, with everything feeding back throughout the whole circuit. Similar to Richard Maxfield's procedure, Oliveros obtains the sound of the bias frequencies of tape recorders combined with the difference, or lower "ghost tones", produced by the interference of very high frequencies. The effect is of massive waves of tones. [allmusic.com]

Art by Yaacov Agam

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