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
Charlie Parker November 26, 1945, Parker led a record date for the Savoy label, marketed as the "greatest Jazz session ever." Recording as Charlie Parker's Reboppers, Parker enlisted such sidemen as Gillespie and Miles Davis on trumpet, Curly Russell on bass and Max Roach on drums. The tracks recorded during this session include "Ko-Ko", "Billie's Bounce" and "Now's the Time". In 1952 Parker and Gillespie released an album entitled "Bird and Diz". Shortly afterward, the Parker/Gillespie band traveled to an unsuccessful engagement at Billy Berg's club in Los Angeles. Most of the group returned to New York, but Parker remained in California,