Dixieland all of the recorded repertoire of New Orleans musicians was from the period when the format was already evolving beyond the traditional New Orleans format. "Dixieland" may in that sense be regarded as denoting the jazz revival movement of the late 1930s to the 1950s as much as any particular subgenre of jazz. The essential elements that were accepted as within the style were the traditional front lines consisting of trumpets, trombones, and clarinets, and ensemble improvisation over a 2-beat rhythm. The Dixieland revival renewed the audience for musicians who had continued to play in traditional jazz styles and revived
1940s in jazz leading ensemble. Through the 1950s and 1960s, Dixieland was one of the most commercially popular jazz styles in the US, Europe, and Japan, although critics paid little attention to it. By the end of the 1940s, the nervous energy and tension of bebop was replaced with a tendency towards calm and smoothness, with the sounds of cool jazz, which favoured long, linear melodic lines. It emerged in New York City, as a result of the mixture of the styles of predominantly white jazz musicians and black bebop musicians, and it dominated jazz in the first half of the 1950s. The