1952
First recipient of Fromm Foundation award for String Quartet
No. 1 and Sonata for Two Pianos
1954 Guggenheim Fellowship
1955 Copley Foundation Award
1956 Fulbright Fellowship
1958 Sir Arnold Bax Society (London) Medal
1958 UNESCO Award (London) for String Quartet No. 2
1966 Guggenheim Fellowship
1967 Official Guest of Union of Soviet Composers
1985 Lancaster (PA) Symphony Orchestra Composer's Award
2003 Grammy Award nomination for Symphony No. 5 ("Kalmar Nyckel")