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
Art Pepper the 1950s Pepper was recognized as one of the leading alto saxophonists in jazz, finishing second only to Charlie Parker as Best Alto Saxophonist in the "DownBeat" magazine Readers Poll of 1952. Along with Chet Baker, Gerry Mulligan and Shelly Manne, and perhaps due more to geography than playing style, Pepper is often associated with the musical movement known as West Coast jazz, as contrasted with the East Coast (or "hot") jazz of Charlie Parker, Dizzy Gillespie and Miles Davis. Some of Pepper's most famous albums from the 1950s are "Art Pepper Meets the Rhythm Section", "Art Pepper + Eleven