William Duckworth (born in 1943) is credited as composer of the first postminimal piece of music, Time Curve Preludes.
He has also composed Thirty-One Days (1987) for Alto Saxophone, and Southern Harmony, a choral work which uses certain features of shaped-note singing. He is the author of Talking Music: Conversations With John Cage, Philip Glass, Laurie Anderson, and Five Generations of American Experimental Composers (ISBN 0306808935), A Creative Approach to Music Fundamentals (ISBN 0534094201), 20/20: 20 New Sounds of the 20th Century (ISBN 0028648641), and the editor of Sound and Light: La Monte Young & Marian Zazeela (ISBN 0838753469).
Nora Farrell , Duckworth's wife, runs Monroe Street Records, which publishes many of his pieces.
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