Multiphonics is a technique used in music, particularly with wind instruments, where a player produces two or more distinct pitches simultaneously. This effect is achieved by manipulating the instrument's embouchure, air pressure, and fingerings, allowing for a richer and more complex sound. It is commonly found in contemporary classical music and jazz. This technique is often associated with instruments like the saxophone, flute, and trumpet. Composers such as Karlheinz Stockhausen and John Cage have explored multiphonics in their works, expanding the possibilities of sound and expression in music.