A drum cadence, sometimes called a "walk beat" or "street beat," is usually played when the band is marching, oftentimes alternating with a song, and is typically how a band keeps time while not playing music. Alternatively, a drum or rim shot may be given on the odd beats to keep the band in step. Between songs and cadences, a roll is usually given to indicate what beat in the measure the band is at. Cadence tempo varies from group to group.