1940s in jazz of the time initially met with a divided, sometimes hostile response among fans and fellow musicians, especially established swing players, who bristled at the new harmonic sounds. To hostile critics, bebop seemed to be filled with "racing, nervous phrases". Despite the initial friction, by the 1950s bebop had become an accepted part of the jazz vocabulary. 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. The swing era lasted until the mid-1940s, and produced popular tunes such as Duke Ellington's "Cotton Tail" (1940) and
John Coltrane discography the session as September 27, 1949 in New York City, but Lewis Porter's "John Coltrane: His Life and Music" states that he was on tour with the Dizzy Gillespie Big Band during that time. Most sources confirm that he recorded with Billy Valentine on November 7 in Los Angeles for Mercury Records. In subsequent years, Coltrane sat in on recording sessions with Gillespie, Johnny Hodges, Earl Bostic, and Gay Crosse. In September 1955, Coltrane joined the Miles Davis Quintet and appeared on several Miles Davis-led recordings, including "'Round About Midnight" and "Milestones". He briefly joined Thelonious Monk in May 1957,