Mouthpiece (brass) Mouthpiece (brass) On brass instruments the mouthpiece is the part of the instrument placed on the player's lips. The mouthpiece is a simple circular opening that leads, via a semi-spherical or conical cavity, to the main body of the instrument. Mouthpieces vary to suit the tone of the instrument. Lower instruments also have larger mouthpieces, to maximize resonance (see pitch of brass instruments). Also, mouthpieces are selected to suit the embouchure of the player, to produce a certain timbre, or to optimize the instrument for certain playing styles. For example, trumpet and trombone mouthpieces are usually semi-spherical whereas French horn
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