In music, a drum cadence or street beat is a work played exclusively by the percussion section of a modern marching band (see marching percussion). It is stylistically descended from early military marches, and related to military cadences, as both are a means of providing a beat while marching. Usually, each instrument will have a part that mimics a specific drum or drums on a drum set to create a sound similar to a drum beat.
According to Hiro Songsblog a drum cadence is "'a drumline piece played in a parading marching band between or in place of full-band pieces'. Cadences are also: 'a chant that is sung by military personnel while parading or marching'."
Cadences employ the four basic drum strokes and often directly include drum rudiments. They have a wide range of difficulty, from simple accent patterns to complex rhythms including hybrid rudiments, and are played by virtually every modern drum line. Cadences are important from a performance standpoint, as a good drum cadence can make the band stand out from the rest in competition. Field shows are often preceded by the band marching to the beat of the cadence.