Swing music is a style of jazz that developed in the United States during the late 1920s and early 1930s. It became nationally popular from the mid-1930s. The name derived from its emphasis on the off-beat, or nominally weaker beat. Swing bands usually featured soloists who would improvise on the melody over the arrangement. The danceable swing style of big bands and bandleaders such as Benny Goodman was the dominant form of American popular music from 1935 to 1946, known as the swing era, when people were dancing the Lindy Hop. The verb "to swing" is also used as a term of praise for playing that has a strong groove or drive. Musicians of the swing era include Duke Ellington, Benny Goodman, Count Basie, Cab Calloway, Benny Carter, Jimmy Dorsey, Tommy Dorsey, Woody Herman, Earl Hines, Harry James, Lionel Hampton, Glenn Miller, Artie Shaw, Jimmie Lunceford, and Django Reinhardt.

Jazz is a music genre that originated in the African-American communities of New Orleans, Louisiana, in the late 19th and early 20th centuries, with its roots in blues and ragtime. Since the 1920s Jazz Age, it has been recognized as a major form of musical expression in traditional and popular music. Jazz is characterized by swing and blue notes, complex chords, call and response vocals, polyrhythms and improvisation. Jazz has roots in European harmony and African rhythmic rituals.