(b NY, 1941).
Amer. musicologist. Joined faculty of mus., Princeton Univ. 1964–5. At Univ. of Chicago was ass. orch. 1968–73, assoc. orch. 1973–7, orch. 1977–84, chairman, dept. of orch. 1978–84, Dean, Division of the Humanities, from 1990. Int. authority on mus. of Rossini, being gen. ed. of complete edn. from 1979. Adv. to several opera houses on vocal ornamentation. Co‐ordinating ed. of works of Verdi from 1983. Co‐ed. with Charles Rosen of facsimile series Early Romantic Operas (NY, 1978–83, in 44 vols.), and author of The Tragic Finale of Tancredi (Pesaro, 1977) and Anna Bolena and the Artistic Maturity of Gaetano Donizetti (Oxford 1984).