"Le Prisonnier Du Son" (1972-91), a concrète melodrama in two parts, was commissioned by the Groupe de Recherches Musicales, and written, realized and performed by the composer in the studios of the INA-GRM in Paris.
"24 Préludes À La Vie" (1989-91), a work in two books, was commissioned by Ministère de la culture and the INA-GRM, and realized in the latter's studios.