content", and how they related to the frequency of the note being sung by the vocalist. He used a modified Latin script with diacritics to write out these sounds, but would occasionally borrow glyphs from other writing systems, including Cyrillic. Most of the langue inventées''' words consist of a single syllable; multisyllablic words are often intentionally hyphenated in the manuscript. Reception CBC Radio host and composer David Jaegar would say, "Vivier was brilliant enough to comprehend all of the theory, but he never let the theory stand in the way of self-expression. His was a unique voice that had both complexity and clarity." His friend Harry Halbreich wrote, "His music is truly unlike any other, and is situated completely on the fringes of all currents. From an expression direct and moving, his music only disoriented dry hearts, unable to classify this marginal genius. Claude Vivier had found what so many others searched and searched: the secret of a real new simplicity." Modernist composers Louis Andriessen and György Ligeti are among those who have cited Vivier as a great inspiration to their own music; Ligeti would later dedicate his time to championing Vivier's catalogue posthumously, saying, "His music is one of the most significant, perhaps even one of the most important developments since the works of Stravinsky and Messiaen," and, "He was neither neo, nor retro, but at the same time was totally outside the avant-garde. It is in the seduction and sensuality of the complex timbres that he reveals himself to be the great master that he is." Legacy and tributes Vivier's close friend Thérèse Desjardins was designated the curator of much of his belongings and artifacts, and subsequently founded Les Amis de Claude Vivier (lit. "The Friends of Claude Vivier"; later renamed to Fondation Vivier), an organization dedicated to promoting his music and biographical details. His original manuscripts and incomplete sketches were donated by Desjardins to the Université de Montréal, where they are currently housed. Former CMQM classmate and experimental composer Walter Boudreau would conduct the premieres of Siddhartha (1975) and Glaubst du an die Unsterblichkeit der Seele? (1983) in 1987 and 1990 respectively, with various Montreal-based orchestras and chamber ensembles. The London Contemporary Orchestra performed a special concert for Glaubst in an abandoned London tube station in 2013, to mimic the theme of the composition.Morrison, Richard (2013). "Late composer Claude Vivier goes underground". The Times. Retrieved 25 July