- Sep 5 John Cage, American composer (Imaginary Landscape No 1/O'O), born in Los Angeles, California (d. 1992)
- Sep 6 Wayne Barlow, American composer, born in Elyria, Ohio (d. 1996)
- Sep 8 Alfio Grasso, Italian jazz guitarist and composer, born in Lentini, Sicily, Italy (d. 1962)
- Sep 15 Gisela Hernández [Gonzalo], Cuban composer (Diálogo), and music educator, born in Cardenas, Cuba (d. 1971)
- Sep 19 Kurt Sanderling, German conductor (East Berlin Symphony 1960-77), born in Arys, German Empire (d. 2011)
- Sep 21 György Sándor, Hungarian pianist, born in Budapest (d. 2005)
- Sep 27 Tauno Marttinen, Finnish composer (Dalai Lama Concerto; Elegia), born in Helsinki, Finland (d. 2008)
About September 1912
How Old? 111 years old
Generation: Greatest Generation
Leap Year: Yes
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