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The tuba is a large brass instrument in the bass-to-contrabass range with a wide conical bore. It usually has four or five valves, although some models have three and some have six. It first appeared in 1835 in Prussia as the Baß-Tuba, by adding five valves to a large 12-foot bugle pitched in F. This design provided a fully chromatic contrabass instrument with a deep, full timbre. By the 1850s, Paris instrument designer Adolphe Sax had developed the E♭ and B♭ band tubas with piston valves as part of his saxhorn family, and in the 1870s Václav František Červený in Austria-Hungary developed contrabass tubas in 16′ C and 18′ B♭ with rotary valves.
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