The style that characterizes this group is part of the “Swing” period of the 1930s. We find there the great names of jazz such as Duke Ellington, Johny Hodges, Fats Waller, Lionel Hampton, Benny Goodmann, Georges Gerschwin, … Swing arrived after the so-called "old style" period (ragtime, blues). It appeared in the mid-1920s and reached its peak in the late 1930s. This style allowed musicians to develop a great deal of improvisation within their formations, in a more elaborate musical line than the old style.