First jazz band consisted of 2 sections one melodic and one rhythm. The Melodic section included 1 or 2 cornets a trombone a clarinet and sometimes even a violin. The Rhythm section included a string bass drums and a guitar or banjo. Jazz was taken over by orchestrasí years later. A society jazz band contained fifteen or more musicians. Now a days there is renewed interest in the big band era even though the music has very little to do with jazz.