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 jazz standards. On November 30, 1949, Norman Granz arranged for Parker to record an album of ballads with a mixed group of jazz and chamber orchestra musicians. Six master takes from this session comprised the album "Charlie Parker with Strings": "Just Friends", "Everything Happens to Me", "April in Paris", "Summertime", "I Didn't Know What Time It Was", and "If I Should Lose You". In 1953, Parker performed at Massey Hall in Toronto, Canada, joined by Gillespie, Mingus, Powell and Roach. Unfortunately, the concert happened at the same time as a televised heavyweight boxing match between Rocky Marciano and Jersey Joe