Tuba many small brass ensembles will use the euphonium or bass trombone as the lowest voice). It is the principal bass instrument in concert bands, brass bands and military bands, and those ensembles generally have two to four tubas. It is also a solo instrument. Tubas are used in marching bands, drum and bugle corps and in many jazz bands (see below). In British style brass bands, two E and two B tubas are used and are referred to as "basses". Well known and influential parts for the tuba include: Concertos have been written for the tuba by many notable composers,
Brass instrument the valves and springs, and the brass of the tubing. This may take the form of desiccant design, to keep the valves dry, sacrificial zincs, replaceable valve cores and springs, plastic insulating washers, or nonconductive or noble materials for the valve cores and springs. Some instruments use several such features. The process of making the large open end (bell) of a brass instrument is called "metal beating". In making the bell of, for example, a trumpet, a person lays out a pattern and shapes sheet metal into a bell-shape using templates, machine tools, handtools, and blueprints. The maker cuts out