Michel Chion's music concrete from 1971-1997, mostly inspired by classical forms. The compositions are 'Etude d'apres Beethoven' and excerpts from other works. Opera is the central theme. As Chion says, "With concrete music, we can create an 'opera for the ear' in which the composer, because he is working on a sound that is fixed, with its own time and space, finds himself with the possibility of providing the music, decors, lighting and also conducting and directing this theater of louspeakers."