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
Musical technique instrumentals. Different instruments require varying techniques. For example, string instruments require fingering technique, while bowed string instruments require bow technique. Brass and woodwind instruments require mouthing techniques (correct positioning and shaping of the mouth and proper breathing), while woodwind instruments often require fingering technique, brass instruments often have simpler fingering than woodwinds but require a basic understanding of the harmonic series. Musical technique is often related to physical memory, such as correct position and stopping on a string instrument, positioning of the trombone slide, memorizing guitar chords' and piano chords' fingering, and the proper position and shape of one's mouth