- Skip (2015), 15:00
- Slow Rant Boogie (1994)flute, oboe, clarinet, piano, percussion, violin, cello and double bass
- Slowdown (2003-04), 8:00six-hand piano
- Smaller Knives (2003), 12:00clarinet, horn, violin, cello and piano
- Smruti Ranga (2015), 5:00 – 8:00interactive comprovisation score for 3 Indian vocalists
- Soap (2020), 2:00Cycle: 2 Minutes From Home
- cello and accordion
- Société II, et si le piano était un corps de femme (1967), 28:00flute (piccolo), oboe, clarinet, bassoon, horn, trumpet, trombone, piano, 3 solo percussions, 4 violins, 2 violas, 2 cellos and double bass
- … sofferte onde serene… (1976)piano and fixed medium
- Solaris (2014), 30:00
- Solentiname (1971-73)flute, clarinet, piano, 2 percussions, violin and cello
- Soliloque no 1 (1991), 4:00
- Solipse (2010), 8:00
- Solitary Pleasure (2011), 40:00
- La Solitude [Loneliness], 6:24
- Solo (2003), 5:07horn in
F - Solo (1983-84), 8:00violin
- Solo for Bass Saxophone (1987-88)bass saxophone
- Solo Identity I, op XXI:1 (1972)bass clarinet
- Solstices (ou Les Jours et les saisons tournent) (1971), 9:00flute, clarinet, horn, 2 percussions and double bass
- Some of These… (1961, 63)organ
- Some Time Later (1986)RAAD string quartet
- Le sommeil d’Euclide (1983), 20:37Cycle: Son Vitesse-lumière
- Le son-refuge (2019), 20:48stereo fixed medium
- Sonance (2021), 8:00multichannel fixed medium
- Sonance (2021), 8:00Arr. Simon-Pierre Gourd, 2023 [original work]multichannel fixed medium [dome]
- piano
- Sonata Brevis (1978)vibraphone
