(b NY, 1939).
Amer. musicologist. Taught at City Coll. of City Univ. of NY 1968–70. Prof. of mus. Cornell Univ. from 1970. Ed.‐in‐chief Current Musicology 1967–70. Wrote biography of Edward MacDowell (1964) and Mozart's Symphonies: Context, Performance, Practice, Reception (1989); co‐ed. (with W. Cowdery) The Compleat Mozart (1990). Wrote Mozart's Piano Concertos (1996) and The New Köchel (2000).