"Symphonie mécanique" is an 1955 movie-essay
directed by the film critic, theorist, and the french filmmaker Jean Mitry (1904 - 1988).
Jean Mitry real name was Jean-René-Pierre Goetgheluck Le Rouge Tillard des Acres de Presfontaines !!
Symphonie mécanique is "a musical ballet made up of mechanical forms in motion.” Jean Mitry
...when Pierre Boulez composed concrete music in the studio of what will become the GRM !!
and another amazing Jean Mitry's movie: "Pacific 231" with Arthur Honegger's music.