Une page “retrouvée” de Pierre Boulez. Sur l’identification de quelques documents conservés à la Fondation Paul Sacher

"Mémoriale (...explosante-fixe... Originel)" (1985) is a member of one of the "families of works" that constitute Pierre Boulez's musical works. The solo flute part, from which the entire work is derived, comes from the flute part of "Explosante-fixe" (1972-1974), and, more precisely, from the last of its nine sequences: Originel. Between 1972 and 1974 Boulez wrote four different versions of this instrumental part. They were played, respectively, in June 1972, December 1972, April 1973, and July 1973; all were played at the time of the performances of "Explosante-fixe". This article studies these various versions and concludes with a detailed analysis of one particular passage - which reconstitutes the serial organization of "Mémoriale", and initiates, for one of its constituent sections, a study of the musical writing and, properly speaking, of its musical results.