MOUTHPIECE (Fr. Bec, Bocal, Embouchure; Ger. Mundstück). That portion of a wind-instrument which, as the name implies, is inserted into the player's mouth, or applied to his lips. Mouthpieces may be divided into those of the Flute and Flageolet, Cupped mouthpieces as in brass instruments, and Reed mouthpieces single or double.
The simplest of all forms is that adopted in the Nay or Egyptian flute, in which the stream of air is directed against the thinned edge of the tube...