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
Bop City War II. While modern jazz, whether in the form of swing or bebop, was popular on Los Angeles' Central Avenue, San Francisco was at the time a haven of traditional jazz (also known as Dixieland). In the 1940s and early 1950s, the Bay Area scene was dominated by Dixieland revival bands such as Lu Watters' Yerba Buena Jazz Band. In the late 1940s, however, new clubs emerged in the Tenderloin and North Beach districts, which changed the music scene in the city. Bop City emerged from the short-lived club Vout City, run by Slim Gaillard on the same premises. Gaillard