- Là où mène le monde (1985-88)flute and stereo fixed medium
- Là où vont les nuages… (1990-91), 11:20ondes Martenot, interactive system and stereo fixed medium
- Labyrinthe (1988), 7:00harp
- Le lac (2001), 23:00ensemble
- Lachrimæ, or Seven Teares (1604), 35:00
- Lacrimosa (2000)soprano, mezzo-soprano and ensemble
- Lalitá: Shadows II (1973)solo flute, 2 harps, 3 cellos and 2 percussions
- Lámed II (ל) (2017), 8:00baritone saxophone
- chorus
- Lamento V (2004), 15:00string quartet and fixed medium
- Lamento/Scherzo (2010), 8:00guitar
- Lampyridae (2003), 10:30flute and processing
- Landocinógena (2009)
- 9 percussions
- Langsamer Satz (1905), 10:00string quartet
- Arr. Robert Flemingvoice and piano
- Lark’s-Heel (2011-12), 15:00violin, cello, clarinet and piano
- Las Meninas (1990-91), 30:00piano
- Las Meninas (1990-91)Arr. Marie-Hélène Breault, Pamela Reimer, 2016flute and pianoOriginal work: Las Meninas
- Version 2016Original work: i. à José Evangelista
- Version 2016Original work: vi. à Peter-Paul Koprowski
- Version 2016Original work: xviii. à la mémoire de Frédéric Chopin
- Version 2016Original work: xix. à la mémoire d’Igor Stravinski
- Version 2016Original work: xx. à Philip Glass
- Las Siete vidas de un gato (1996), 18:008 musicians
- Last Pieces (1959)piano
- The Last Rose of Summer (1865-66), 3:44Arr. Benjamin Brittenvoice and piano
- Laudes (2007)soprano and piano
- Lautari (1999-2001), 11:00violin, cello and piano
- … le mien est un cri, … (2015)
- «… le sifflement des vents porteurs de l’amour» (1971), 13:00flute and percussion
- Learning (1976), 20:004 violins, percussion (claves and Balinese gong) and fixed medium
- Leçon de choses (1993), 12:00ensemble and processing
