- clarinet and small ensemble
- Clarinet Song (2002), 15:00Arr. José Evangelista, 2007 [original work]clarinet and piano
- Clarinet Threads (1985), 13:25clarinet and stereo fixed medium
- Cleaning Instructions, 1:00pianoCycle: One Minute More
- Clere Vénus (2001), 27:00solo soprano, flutes (in
C and inG ), oboe, B-flat clarinet, bass clarinet, bassoon, 2 horns, piano, 5 violins I, 4 violins II, 3 violas, 2 cellos and double bass - Le Clessidre di Dürer (1985)clarinet, piano, violin and cello
- Cliff! (2004), 27:00installation
- Climax Room (2022), 10:48stereo fixed medium
- La cloche du temple (1996), 11:00piano
- Clone (1997)wind quintet and piano
- Clos de vie (1983), 16:00electric guitar, banjo, harp, harpsichord, piano, vibraphone, 2 violins, cello and double bass
- Clos de Vougeot (1977)4 percussions
- Close Encounter (2009), 14:35bowl and processing
- Close Encounter of the Second Kind (2022), 13:00clarinet, electric guitar, percussion, 2 Babel tables, siren organ and fixed medium
- Cloudburst (1992)chorus
- Le clown des cavernes (2008), 5:31oud, jazz piano, double bass and percussion
- Cocktail (2015), 10:00
- Cocktail Music (Musiques entre 5 et 7) (1983), 20:00saxophone and percussion
- Les cœurs de Marguerite (2013), 3:00voice and percussion
- Coffre I (1975), 3:00flute, oboe/English horn, horn in
F , tenor trombone (the 4 winds can be replaced by a saxophone quartet), soprano and percussion - orchestra
- Coffre III (Le Cercle Gnostique I) (1976-77), 25:00flute (also piccolo, flute in
G and bass flute), guitar and soprano - Coffre III(a) (Le Cercle Gnostique I {<Incantations IV>}) (1978, 84), 10:00flute (or clarinet), cello and piano
- harpsichord, percussion, 8 violins, 2 violas, 2 cellos, 1 double bass
- Collage #1 (2013), 3:00voice
- Collage #2 (2013), 4:00percussion
- Collage #3 (2013), 4:00voice
- Coloratura (1966)oboe and piano
- violin, viola, cello, guitar, guitar with bow and fixed medium
