Big band a considerable range of styles among the hundreds of popular bands. Many of the better known bands reflected the individuality of the bandleader, the lead arranger, and the personnel. Count Basie played a relaxed, propulsive swing, Bob Crosby more of a dixieland style, Benny Goodman a hard driving swing, and Duke Ellington's compositions were varied and sophisticated. Many bands featured strong instrumentalists whose sounds dominated, such as the clarinets of Benny Goodman and Artie Shaw, the trombone of Jack Teagarden, the trumpet of Harry James, the drums of Gene Krupa, and the vibes of Lionel Hampton. The popularity of many
Benny Goodman late 1930s with his big band, his trio and quartet, and the sextet formed in August 1939, the same month Goodman returned to Columbia Records after four years with RCA Victor. At Columbia, John Hammond, his future brother-in-law, produced most of his sessions. By the mid-1940s, however, big bands had lost much of their popularity. In 1941, ASCAP had a licensing war with music publishers. From 1942 to 1944 and again in 1948, the musicians' union went on strike against the major record labels in the United States, and singers acquired the popularity that the big bands had once enjoyed.