The biggest instruments on the drum line. usually 5 of them each at different pitches to make a melodic sound to the drum line. The bigger the better.

1. Some of the sweetest instruments in marching band. Starts at #1 (usually carried by the smallest member) and increases in size. High schools normally have around four or five. Colleges/universities usually have many more.
2. That really big drum in concert band/pit.