Bass Tuba, brief description

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Classification
Aerophone, lip-vibrated instrument, brass wind instrument. Belongs to the valved bugle-horns family.

Material
Brass, gold brass, nickel silver, gold lacquer.

Mouthpiece
Deep cup mouthpiece

Tubing
Length 350–400 cm, conical along entire length

Bore
Very wide, inner diameter 17.3–19.5 mm

Valves
Four to six valves (lowering pitch by 1, ½, 1½ steps, fourth-valve, fifth-valve – this can also be a compensating valve with a wide whole step. The 6th valve is a compensating valve with a wide half step).

Bell
Rim diameter 35.5–41.9 cm”

https://www.vsl.co.at/en/Brass/Bass_tuba

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Bass Trombone: Instrument Studies for Eyes and Ears — Jacobs School of Music

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