- Clifford Bevan
A valved brass instrument of wide conical bore. The tubing is usually coiled into an elliptical shape and terminates in a wide bell (usually pointing upwards) and a deep, cup-shaped mouthpiece. The instrument has an open fundamental of 8′ C (or lower) and is equipped with three to six (usually four, rarely seven) valves to alter the length of the tubing and hence the pitch. It is generally used in jazz as the bass or contrabass member of the band....