Contrabass bugle

The contrabass bugle (often shortened to contra or simply called the marching tuba) is the lowest-pitched brass instrument in the drum and bugle corps and marching band hornline. It is the drum corps' counterpart to the marching band's sousaphone: the lowest-pitched member of the hornline, and a replacement for the concert tuba on the marching field.

The contrabass bugle is different from the other members of the marching band and drum corps hornlines in that it rests on the shoulder of the player, rather than being held in front of the body. Because the contrabass bugle can get in the way of commonly worn headgear, such as a shako, it is not uncommon for contrabass players to wear a beret instead of whatever else the rest of the ensemble is wearing for headgear. This also gives the players some distinction from the rest of the brass ensemble.