- Liebesgedichte (1975)4 mixed voices, oboe, clarinet, bassoon, heckelphone, English horn, 2 trumpets, trombone and bass trombone
- Lieder des Lichts (2003), 16:00mezzo-soprano, cello
- Lièger métal (1988)chamber orchestra
- Lifetime (2005), 80:006 musicians and audiovisual system
- Time & Money, 20:00percussion, processing and video
- videomusicvideo
- small ensemble, processing and video
- Light Music (2004), 20:00solo conductor, projection and interactive system
- mixed chorus
- Lignes (1962), 15:00bass, bassoon, 3 horns, 3 trombones, tuba, 6 percussions and double bass
- Lignes et points (1964), 11:00orchestra
- Lilt (2018)
- Lily [mixed version] (2011-12), 14:40Arr. Yves Daoust, 2014-18accordion, violin and 4-channel fixed medium
- Limaille (2023), 13:00
- Limits & Renewals (2000-11), 50:006 singers and orchestra
- Linéa (1973)2 pianos and 2 percussions
- Liquid States (2004), 15:00chamber orchestra
- Listening (2014), 17:10multichannel fixed medium
- Litaneia (1984)chorus and orchestra
- Lithographies (2005), 7:00four-hand piano tuned in 16th tones
- Little Angel, 1:00pianoCycle: One Minute More
- Le livre des mélancolies (1999), 16:45clarinet and string quartet
- Livre d’Orgue (1951), 45:00organ
- Livre II (1590)
- Livre V (1605)
- Livre VI (1614)
- Zefiro torna (1994)
- Lo spazio inverso (1985), 8:00flute, clarinet, violin, cello and celesta
- Lo Tisa (Do Not Accept) (2003, 15-16)Cycle: Mishpatim (Laws)
- Logos II (2015), 18:00flute, clarinet, violin, viola, cello and piano
- Lointain (2008), 8:08oud, jazz piano, double bass and percussion
- … l’oiseau du cri à la quête des ailes… (2004), 7:00clarinet
- Lojic (1997)piano
