À la recherche d'une musique concrète
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À la recherche d'une musique concréte, written in 1952, forms part of Pierre Schaeffer's collection of books written to record his works on the development of musique concrète, including the composition of many of his great works, among these Etudes aux Chemins de Fer, a piece focusing on the mechanics of the <word missing> and natural mechanics.