(b Champaign, Ill., 1931).
Amer. composer. Taught in Ger. 1957–8. Taught at Columbia Univ. 1958–66, assoc. prof. of mus. Princeton Univ. 1968, prof. 1971, chairman, mus. orch. 1974–8, 1983–6. Works incl. 2 chamber operas, cantata to text by Dylan Thomas (1958), 5 Movements for orch., chamber works.