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
Jazz band Jass Band. It is reported that the first known recording of "Jas", "That Funny Jas Band from Dixieland (1916)" was by Collins and Harlan for Thomas A. Edison, Inc. on Blue Amberol in December 1916. The first Jazz record, "The Original Dixieland One-Step" was issue 18255 by Victor Talking Machine Company in 1917. This is the first record with "Jass" on the label, attributed to the "Original Dixieland 'Jass' Band". After litigation and claims of copyright infringement, the title was changed to "Dixie 'Jass' Band One-Step". Vince Guaraldi and Ramsey Lewis were notable leaders of jazz trios in the 1960s,