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 cable or bar reinforcement. Rubber bits are generally thicker than metal bits, but other types of plastics are also used, often the same size and some flavored. Types of Bits: All types. What it is: The mouthpiece is a straight bar of material, without any joints or ports. In the mullen mouth, the bar has a slight bow to it, curving gently to allow some room for the tongue. Action: The mullen mouth and straight bar are fairly similar in action, placing pressure on the tongue, lips, and bars. The mullen provides extra space for the tongue, instead of constantly