Euphonium main tuning slide trigger, which allows players more flexibility with intonation. The euphonium, like the tenor trombone, is pitched in concert B. For a valved brass instrument like the euphonium, this means that when no valves are in use the instrument will produce partials of the B harmonic series. It is generally orchestrated as a non-transposing instrument like the trombone, written at concert pitch in the bass clef with higher passages in the tenor clef. Treble clef euphonium parts transposing down a major ninth are included in much concert band music: in the British-style brass band tradition, euphonium music is
Tuba a strap joined to the tuba with two rings. The strap goes over the shoulder like a sash, so the musician can play the instrument in the same position as when sitting. The tuba has been used in jazz since the genre's inception. In the earliest years, bands often used a tuba for outdoor playing and a double bass for indoor performances. In this context, the tuba was sometimes called "brass bass", as opposed to the double bass "(string bass)". Many musicians played both instruments. In modern jazz, tubas usually fill the traditional bass role, though it is not uncommon