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 brass instrument, sound is produced with a lip vibration or "buzz" in the mouthpiece. The euphonium is a member of the large family of valved bugles, along with the tuba and flugelhorn, characterized by a wide conical bore. Most instruments have four valves, usually compensating piston valves, although instruments with four or five rotary valves are common in Eastern and Central Europe.