摘要：In 1944, Messiaen offered a systematic description of his musical language in a text entitled Technique de Mon Langage Musical, an exposition of his compositional techniques that represents one of the most important accounts of his musical thoughts. This text is important not only in understanding his methods of composition, but also in comprehending the multiplicity and variety of his aesthetic ideas. In spite of the large variety of sources that inspire it, in Technique, Messiaen presents a compositional thought that, at least in part, proves to be substantially cohesive The purpose of this paper is to describe the content of the Technique, with particular attention to aspects concerning rhythm and harmony, which are the elements that received Messiaen＇s deepest attention and which also had the greatest influence on later 20th-century composers

摘要：The article concerns the commission that was made by the Biennale di Venezia to Stravinsky in the 50s＇ which led to the composition of the Canticum Sacrum. The discovery of the correspondence between the composer, the artistic director Alessandro Piovesan and the organizers of the Venetian Festival allows to reconstruct the events that led Stravinsky to change his initial plans for a Passion selon Saint Marc in favour of a short Canticum. The objections, which concerned above all the limited size of the piece, were repeated several times by Piovesan, but were all disregarded by Stravinsky. In the light of the eight letters deposited in the Archivio Storico delle Arti Contemporanee （ASAC） of Venice （in Appendix）, the circumstances bringing about Stravinsky＇s refusal can be fully understood. The references to recent studies by David H. Smyth, Akane Mori, and Jonathan Kramer regarding the identification of palindromic and proportional structures in the Canticum, offers further proof sustaining Stravinsky＇s declaration that to enlarge the piece would have been impossible. These events confirm the composer＇s unbending determination to undertake a new experimental stylistic direction already tried out in pieces like the Three Songs from William Shakespeare and Agon.