Having attended successively the conservatories of Geneva and Venice, Pierre Mariétan studied composition with Zimmermann at Cologne, Boulez and Stockhausen in Basel, and Henri Pousseur. The founder, in 1966, of the group for study and musical practice (GERM), he created, in 1979, the laboratory for acoustics and urban music, installed at the architectural school in Paris La Villette since 1990. A university teacher (Paris I and VIII) then at the École Nationale Supérieure d'Architecture in Paris La Villette, he became closely interested in the relationship between music and the environment and in the attendant issues. Apart from his involvement in the setting up, in 1997, of an international aural ecology congress at the Abbaye de Royaumont, he launched a project for architecture-music-ecology encounters (RAME) in 1998. At the origin of his musical output lies an attentive ear to the world, that he has made a fundamental, overriding criterion. His output comprises more than 200 compositions in various genres (instrumental, vocal, electro-acoustic, etc.), of which some thirty pieces were written notably for the radiophonic workshop of France Culture and many temporary or permanent sound set-ups. Among Mariétan’s works are Récit suivi de légende, Images du Temps, D'instant en instant, Le bruit court – that in 1996 received the Acustica International Prize of the Westdeutscher Rundfunk (WDR), Concept for orchestra: Échapper au temps est-ce possible? and Fragments scéniques.