George Crumb — American Composer born on October 24, 1929,
George Crumb is an American composer of avant-garde music. He is noted as an explorer of unusual timbres, alternative forms of notation, and extended instrumental and vocal techniques. Examples include seagull effect for the cello, metallic vibrato for the piano, and using a mallet to play the strings of a contrabass, among numerous others. He is not an electronic music composer; however, many works call for amplification of instruments, such as Black Angels or Ancient Voices of Children. Crumb defines music as "a system of proportions in the service of spiritual impulse.".. (wikipedia)