Tenor horn horn is a valved brass instrument (in E) which has a predominantly conical bore like the baritone horn and flugelhorn. It uses a deep funnel- or cup-shaped mouthpiece. The tenor horn's conical bore and deep mouthpiece produce a mellow, rounded tone which is often used as a middle voice, supporting the melodies of the trumpets, cornets or flugelhorns, and filling the gap above the lower tenor and bass instruments (the trombone, baritone horn, euphonium and tuba). Its valves are typically, though not exclusively, piston valves. The tenor horn has been made and is made in various shapes: the most common
Tuba high school marching bands) and for adult amateurs. Many professionals in the U.S. play CC tubas, with BB also common, and many train in the use of all four pitches of tubas. The next smaller tubas are the bass tubas, pitched in F or E (a fourth above the contrabass tubas). The E tuba often plays an octave above the contrabass tubas in brass bands, and the F tuba is commonly used by professional players as a solo instrument and, in America, to play higher parts in the classical repertoire (or parts that were originally written for the F tuba,