Jazz leader of New Orleans' Camelia Brass Band, D'Jalma Ganier, taught Louis Armstrong to play trumpet; Armstrong would then popularize the New Orleans style of trumpet playing, and then expand it. Like Jelly Roll Morton, Armstrong is also credited with the abandonment of ragtime's stiffness in favor of swung notes. Armstrong, perhaps more than any other musician, codified the rhythmic technique of swing in jazz and broadened the jazz solo vocabulary. The Original Dixieland Jass Band made the music's first recordings early in 1917, and their "Livery Stable Blues" became the earliest released jazz record. That year, numerous other bands made
Jazz 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. In 1944, jazz impresario Norman Granz organized the first Jazz at the Philharmonic concert in Los Angeles, which helped make a star of Nat "King" Cole and Les Paul. In 1946, he founded Clef, discovering Canadian jazz pianist Oscar Peterson in 1949 and merging Clef with his new label Verve in 1956, which advanced the career of Ella Fitzgerald. By the end of the 1940s, the nervous energy and tension of bebop was