Jazz in the post-war years: In the early 1940s, bebop-style performers began to shift jazz from danceable popular music toward a more challenging "musician's music." The most influential bebop musicians included saxophonist Charlie Parker, pianists Bud Powell and Thelonious Monk, trumpeters Dizzy Gillespie and Clifford Brown, and drummer Max Roach. Divorcing itself from dance music, bebop established itself more as an art form, thus lessening its potential popular and commercial appeal. Composer Gunther Schuller wrote, "In 1943 I heard the great Earl Hines band which had Bird in it and all those other great musicians. They were playing all the flatted
Horn in jazz incorporate the French horn into a jazz ensemble. In early 1940, the Claude Thornhill Orchestra had moved out to southern California. During this time, the Thornhill band was moving jazz in an entirely new direction, creating an entirely new sound. Thornhill's original band comprised twelve musicians, all playing traditionally "jazz" instruments. When Thornhill hired Bill Borden as an arranger, they created a group with a more orchestral style. Their new sound involved using instruments that were not typical to jazz and mixing unusual instrument voicing. Around the same time, Julius Watkins joined a six-member jazz band playing horn. Watkins had