Graas was born in
Dubuque, Iowa, on March 14, 1917. He was educated in
classical music and attended
Tanglewood Music Center, where he performed under the tutelage of
Serge Koussevitsky. He soon became interested in jazz and studied ways to bring jazz and classical music together, an early effort at what would later be called
Third Stream music. Following the path of his dual interests, he was a member of the
Indianapolis Symphony Orchestra (1941), the
Claude Thornhill Orchestra (1942), the
Army Air Corps band during
World War II (1942–1945), the
Cleveland Orchestra (1945–1946), the
Tex Beneke Orchestra (1946–1949), and the
Stan Kenton Orchestra (1950–1953). ==Discography==