So You Think You Know Music was a musical radio quiz show.
CBS Radio (Weekly): 7/9/1939 – 9/17/1939, 10/15/1939 – 2/18/1940, 4/17/1940 – 4/28/1940
NBC Red (Weekly): 9/17/1940 – 4/29/1941
Mutual Radio (Weekly): 11/23/1945 – 4/26/1946
John Reed King
This show called for contestants to answer questions about music and composers for merchandise prizes.