Brass instrument the player of a brass instrument has direct control of the prime vibrator (the lips), brass instruments exploit the player's ability to select the harmonic at which the instrument's column of air vibrates. By making the instrument about twice as long as the equivalent woodwind instrument and starting with the second harmonic, players can get a good range of notes simply by varying the tension of their lips (see embouchure). Most brass instruments are fitted with a removable mouthpiece. Different shapes, sizes and styles of mouthpiece may be used to suit different embouchures, or to more easily produce certain tonal
Bit mouthpiece making them "extremely" severe to the point where it is easy for any rider to cut and ruin the horse's mouth, especially the lips. Many horsemen, even the most skilled riders, will not put such a harsh bit in their horse's mouths. Many equestrian organizations do not allow a bit to be 1/4 inch or thinner in diameter. If the rider gives crude aids, it is generally best to pick a bit mouthpiece that is thicker. This may also be true with some horses with relatively thin bars. Bit mouthpiece The mouthpiece is the part of a horse's bit that