baritone, piano, 1990 (also arranged for baritone, orchestra, 1990); Des laines de lumière (text by Gatien Lapointe), bass-baritone, 2 quarter-tone pianos, 1996; La voix d'oiseau, coloratura soprano, piano, 1998; Trois Poèmes de Gatien Lapointe, voice, piano, 1998; Onze Poèmes pour la main gauche, soprano, piano, 2000 Piano Smaragdin, 1960; Like Snow, 1960; Mystras, 1962; Fantasy, 1964; Sonata, 2 pianos, 1969–70; In memoriam Alexander Uninsky, 1974; Régime 11, Type A, 2 pianos (tuned a quarter-tone apart), 1978; Poème du délire, 3 specially-tuned pianos, 1982; Hommage à Carrillo, sixteenth-tone piano, 1996; D'après un cri, 1996; Régime 17, third-tone piano, 1997; Eight Études, sixteenth-tone piano, 2000 In memoriam Gordon Sheppard, sixteenth-tone piano, 2 pianos (tuned a quarter-tone apart), 2006 Hommage à Wyschnegradsky, 2009 Organ Six Études, 1982; Études Nos. 7-8, 1993 Ardennes, 2002 Cinq Pièces faciles, organ 4 hands, 2002 Harpsichord Saumur, quarter-tone harpsichord, 1990 Electroacoustic Madrigal IV (text by Hector de Saint-Denys Garneau), soprano, flute, piano, tape, 1972; Barolo, cello, tape, 1977; Aux victimes de la guerre de Vendée (1793), French horn, 2 pianos, tape, 1990 External links Text by Mather explaining his music and his history(fr) References 1939 births Living people 20th-century classical composers 21st-century classical composers Academic staff of the Conservatoire de Paris Aspen Music Festival and School alumni Conservatoire de Paris alumni Canadian classical composers Canadian male classical composers Jules Léger Prize for New Chamber Music winners McGill University faculty Microtonal musicians Musicians from Toronto Canadian opera composers The Royal Conservatory of Music alumni Stanford University alumni Université de Montréal faculty University of Toronto alumni University of Toronto faculty 20th-century Canadian composers Pupils of Darius Milhaud