Drum and bugle corps
Before 2000, most drum corps played brass instruments with two buttons, or "valves". These play a "G" note when no valves are pressed. These "bugles" give drum and bugle corps its name. Bugles are very similar to other brass instruments, but bugles are not usually made well, and they can be very difficult to play well when you want them to. Now, most drum corps play instruments that sound a bit higher; they play a B-flat when no buttons are pressed. These are called marching instruments, and sound and play very similar to the instruments played in concert halls.