"Music Promenade" (1964-1969): Electroacoustic Music, world premiere for the Théâtre de la musique, March 16, 1970 "Hétéro-Concert". Permanent version for four stand-alone tape recorders. A series of colliding realistic sounds and sonic images. Whilst walking, a man is struck by the violence of his surroundings. Nature has disappeared in a whirlwind of warfare and industry in the midst of which he encounters a dying folklore and a lost young girl. The "Installation" version is used to sonify a place in which walkers are free to choose their musical itinerary. "Unheimlich Schön" (1971): Musique concrète made in 1971 in the studios of the Südwestfunk in Baden-Baden. Voice: Ilse Mengel. "How does a young woman breathe when thinking about something else?" To be listened to at a low volume. Translations by Valérie Vivancos. Layout by Stephen O'Malley; Photos by Jacques Brissot, ARR. Coordination GRM by François Bonnet. Remerciements by Brunhild Ferrari. Executive Production by Peter Rehberg; Digital transfer by Jonathan Fitoussi and Diego Losa; Cut by Rashad Becker at Dubplates & Mastering, Berlin, November 2018.