Swing music, also known as swing jazz or simply swing, is a form of jazz music that developed in the early 1930s and had solidified as a distinctive style by 1935 in the United States. Swing uses a strong anchoring rhythm section which supports a lead section that can include brass instruments, including trumpets and trombones, woodwinds including saxophones and clarinets or stringed instruments including violin and guitar; medium to fast tempos; and a "lilting" swing time rhythm. Swing bands usually featured soloists who would improvise a new melody over the arrangement. The danceable swing style of bandleaders such as Benny Goodman and Count Basie was the dominant form of American popular music from 1935 to 1945.