- Sep 3 Joseph Lamb, American ragtime pianist and composer ("Bohemia Rag"), dies of a heart attack at 72 [1] [2]
- Sep 9 Armas Maasalo, Finnish composer, organist (St. John's Lutheran Church, 1926-58), and pedagogue (Helsinki Church Music Institute, 1914-51), dies at 75
- Sep 9 Jussi Björling, Swedish operatic tenor, dies from cardiomegaly (enlarged heart) complications at 49
- Sep 12 Jules Buffano, American composer and pianist (Jimmy Durante Show), dies at 62
- Sep 13 Leó Weiner, Hungarian composer (Toldi), and music educator (Budapest Academy of Music, 1912-60), dies at 75
- Sep 16 José Sancho Marraco, Spanish composer, organist and chapel master (Cathedral of Barcelona, 1923-57, dies at 81
- Sep 20 Michel Brusselmans, Belgian composer, dies at 74
- Sep 24 Mátyás Seiber, Hungarian-British classical and jazz composer (Scherzando), dies at 55