George Crumb, composer.
“Black Angels” (1970), one of Mr. Crumb’s best-known works and a reaction to the Vietnam War, was an early example of his imaginative eclecticism. It is scored for an amplified string quartet and features techniques such as tapping the strings with thimbles. A mournful fragment from Schubert’s “Death and the Maiden” string quartet is interrupted by fierce bow strokes and human shouts.
The grimly claustrophobic music of the first movement, “Threnody I: Night of the Electric Insects,” was deemed sufficiently scary to be used on the soundtrack for the horror film “The Exorcist.”
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Other pieces were equally theatrical and sometimes featured ritualistic elements. A recording of whale songs made by a marine scientist inspired his “Vox Balaenae (Voice of the Whale)” for electric flute, cello and amplified piano (1971). The performers wear black half-masks; Mr. Crumb also specified that (where possible) the performance take place under blue lighting. He used various extended techniques, like strumming the piano strings with a paper clip, to create eerie sonorities.
Each movement of his orchestral piece “Echoes of Time and the River” (awarded the Pulitzer Prize in 1968) features processionals in which small groups of musicians move around the stage in patterns and directions specified in the score — requirements Mr. Crumb later acknowledged were rather impractical.