There are many distinct types of trumpet, with the most common being pitched in B (a transposing instrument), having a tubing length of about . Early trumpets did not provide means to change the length of tubing, whereas modern instruments generally have three (or sometimes four) valves in order to change their pitch. There are eight combinations of three valves, making seven different tubing lengths, with the third valve sometimes used as an alternate fingering equivalent to the 1–2 combination. Most trumpets have valves of the piston type, while some have the rotary type. The use of rotary-valved trumpets is more common in orchestral settings (especially in German and German-style orchestras), although this practice varies by country. Each valve, when engaged, increases the length of tubing, lowering the pitch of the instrument. A musician who plays the trumpet is called a "trumpet player" or "trumpeter".