The Euphonium is a brass wind instrument with valves, pitched in C or B♭, an octave below the trumpet. It has a wide conical bore resembling that of the tuba and is held vertically with the bell upward. It normally carries a fourth valve in addition to the essential three because without the fourth valve there would be a gap between the two lowest notes producible. The euphonium consists of different parts including the bell, mouthpiece, valves, main tuning slides, and the tuning slides. To play the euphonium, the euphoniumist has to put their lips together and make a buzzing sound through the mouthpiece by blowing a consistent stream of air into it. The euphoniumist changes the pitch of the euphonium by pressing the valves of the euphonium. He/she can also change the pitch of the euphonium by buzzing their lips faster or slower too.