Différences is a composition by the Italian composer Luciano Berio for flute, clarinet, viola, cello, harp and magnetic tape, dating 1958–59.
It was written for the Domaine musical concerts in Paris and first performed in March 1959, conducted by Pierre Boulez.
They return with various pizzicato entries, creating a homogeneous texture which seeks only an alteration in the expression rather than a disruption in the character of the music.
Berio began the composition for Différences a year before the premiere by recording in Paris the same musicians who were to give the first performance.
In the Studio di fonologia musicale in Milan he then transformed these recordings to produce the tape with which the musicians interact during the performance.