Dizzy Gillespie on traditional Afro-Cuban rhythms. Gillespie was introduced to Chano Pozo in 1947 by Mario Bauza, a Latin jazz trumpet player. Chano Pozo became Gillespie's conga drummer for his band. Gillespie also worked with Mario Bauza in New York jazz clubs on 52nd Street and several famous dance clubs such as the Palladium and the Apollo Theater in Harlem. They played together in the Chick Webb band and Cab Calloway's band, where Gillespie and Bauza became lifelong friends. Gillespie helped develop and mature the Afro-Cuban jazz style. Afro-Cuban jazz was considered bebop-oriented, and some musicians classified it as a modern style.
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