Bechet gained recognition for playing the soprano saxophone during the 1920s, but the instrument did not come into wide use until the modern era of jazz. As Chicago style jazz evolved from New Orleans jazz in the 1920s, one of its defining features was the addition of saxophones to the ensemble. The small Chicago ensembles offered more improvisational freedom than did the New Orleans or large band formats, fostering the innovations of saxophonists Jimmy Dorsey (alto), Frankie Trumbauer (c-melody), Bud Freeman (tenor) and Stump Evans (baritone). Dorsey and Trumbauer became important influences on tenor saxophonist Lester Young. Lester Young's approach on tenor saxophone differed from Hawkins', emphasizing more melodic "linear" playing that wove in and out of the chordal structure and longer phrases that differed from those suggested by the tune. He used vibrato less, fitting it to the passage he was playing. His tone was smoother and darker than that of his 1930s contemporaries. Young's playing was a major influence on the modern jazz saxophonists Al Cohn, Stan Getz, Zoot Sims, Dexter Gordon, Wardell Gray, Lee Konitz, Warne Marsh, Charlie Parker, and Art Pepper. The influence of Lester Young with the Count Basie Orchestra in the late 1930s and the popularity of Hawkins' 1939 recording of "Body and Soul" marked the saxophone as an influence on jazz equal to the trumpet, which had been the defining instrument of jazz since its beginnings in New Orleans. But the greatest influence of the saxophone on jazz was to occur a few years later when alto saxophonist Charlie Parker became an icon of the bebop revolution that influenced generations of jazz musicians. The small-group format of bebop and post-bebop jazz ensembles gained ascendancy in the 1940s as musicians used the harmonic and melodic freedom pioneered by Parker, Dizzy Gillespie, Thelonious Monk, and Bud Powell in extended jazz solos. During the 1950s, prominent alto players included Sonny Stitt, Cannonball Adderley, Jackie McLean, Lou Donaldson, Sonny Criss and Paul Desmond, while prominent tenor players included Lester Young, Coleman Hawkins, Dexter Gordon, John Coltrane, Sonny Rollins, Stan Getz, Zoot Sims, Lucky Thompson, Eddie "Lockjaw" Davis, and Paul Gonsalves. Serge Chaloff, Gerry Mulligan, Pepper Adams and Leo Parker brought the baritone saxophone to prominence as a solo instrument. Steve Lacy renewed attention to the soprano saxophone in the context of modern jazz and John Coltrane boosted the instrument's popularity during the 1960s. Smooth jazz musician Kenny