Also new on the label from Chion is Préludes à la vie (Preludes to Life). This combines pieces from 1972 to 1991 in two electronic operas. In Le prisonnier du son (The Prisoner of Sound) a single human voice tells the story of a lone character trapped in a world of manipulated sounds. The title piece is a series of technical exercises in the possibilities of musique concrète. (3/5)