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 LaPorta with the Woody Herman Orchestra. Beginning in 1947 he studied with Lennie Tristano. With Teo Macero and Charles Mingus he was a member of the Jazz Composers Workshop, trying to combine jazz with classical music. In the classical world, he worked with Boston Pops, Leonard Bernstein, Leopold Stokowski, and Igor Stravinsky. In jazz he worked with Kenny Clarke, Miles Davis, Dizzy Gillespie, Charlie Parker, Buddy Rich, and Lester Young. He taught at Parkway Music School, then at public schools on Long Island, followed by the Manhattan School of Music and the Berklee College of Music. With guitarist Jack Petersen, he