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
Jazz Fest Wien Square. Apart from jazz, soul, blues, rock and pop musicians and a diversity of world and fusion musicians and many genres of jazz participate, usually about 50 artists annually. At the very first festival in 1991 were artists such as Jan Garbarek, Oscar Peterson, John Scofield, Pat Metheny, Manhattan Transfer, Dizzy Gillespie, Pharoah Sanders, Archie Shepp, John Zorn, Elvin Jones, Gilberto Gil, Miles Davis, George Benson, Carlos Santana, Charlie Haden, Elvin Jones and Joe Zawinul etc. The 2006 festival saw the likes of Michiel Borstlap, Madeleine Peyroux, Chick Corea, Richard Galliano, Candy Dulfer, the Neville Brothers, Herbie Hancock, Randy Newman