The tuba is a large brass instrument in the bass-to-contrabass range. It is a member of the valved bugles, a large and diverse family of instruments characterized by their wide conical bore and use of
A bass tuba in F with front-action piston valves
Chink Martin (far left) on sousaphone in Johnny Bayersdorffer's Novelty Orchestra, New Orleans, 1922
The jazz recordings on Birth of the Cool (1957) by Miles Davis are some of the first to use tuba, recorded 1949–50
Euroband musicians with fiberglass sousaphones
The euphonium is a tenor- and baritone-voiced valved brass instrument pitched in 9-foot B♭ an octave below the B♭ trumpet or cornet, employed chiefly in brass, military, and concert bands. As with any
Tuba
…have no standardized measurements of bore widths or bell diameters, but are useful for comparing models in a single manufacturer's catalog. The euphonium, pitched in 9′ B♭ a fourth above the bass tuba in F, is sometimes referred to as a tenor tuba, particularly by British composers. This term can also…
Compensating 4-valve euphonium by Besson
Ferdinand Sommer playing his Sommerophone at the 1851 Great Exhibition, London
Marching euphonium by King
Amilcare Ponchielli, composer of the first original euphonium solo