"Musique Sans Titre", composed in 1951 at the "Studio d'essai" of the RTF, was one of Henry's earliest attempts at "musique concrète". "Spatiodynamisme", on the other hand, was based on the 1954 recordings of a Nicolas Schoffer sound-sculpture. Metallic parts, mirrors, lights and sounds emanating from a 50-meter building interacted with the environment and visitors. Henry recorded various grating and scraping sounds from the metallic sculpture and then manipulated them for this piece, which was influenced by Italian Futurist Luigi Russolos "L'Arte Dei Rumori".