- Approches (1991), 25:002 flutes (piccolos), oboe, clarinet, bassoon (double bassoon), 2 horns, 2 trumpets in
B -flat (trumpets inC ), bass-tenor trombone, bass trombone, harp, piano, 2 percussions, 4 violins, 2 violas, 2 cellos and double bass - L’après (l’Infini) (1993), 13:00flute in
G , English horn, piano, percussion and cello - Après tant d’années (2010)Cycle: Visages
- L’arbre de Borobudur (1994), 22:00gamelan, waves, 2 horns, 2 harps, 2 percussions and double bass
- Arc II (1998-99), 11:00saxophone quartet
- Arcana (version de chambre) (1973)soprano, flute, clarinet, trumpet, trombone, harp, piano, percussion, violin, cello and double bass
- L’Arche (2004), 50:008 singers
- L’Arche (2007)circus performance3 musicians and 5 acrobats
- Archipel (2016), 29:00fixed medium
- Archipel I (1967)2 pianos and 2 percussions
- Archipel III (1969)piano and 6 percussions
- Archipel V (1970)organ
- Archipelago (2020), indefinite durationsolo or multiple wind instruments
- Architectonica Nobilis (2004), 12:00violin, cello, piano and processing
- Architectures colorées (1964)flute, oboe, B-flat clarinet,
B -flat bass clarinet, horn, trumpet, trombone, 3 percussions, 2 violins, viola, cello and double bass - Arena II (1996)16 musicians
- L’argent (2016), 14:00
- arghanum I (1986)solo accordion, clarinet, bass clarinet, synthetizer and vibraphone
- arghanum V [1990-I] (1990), 14:05accordion (or piano) and fixed medium
- Argia ezta ikusten (1973)2 clarinets, piano and 2 percussions
- Aria (1946), 4:00violin
- Aria (1958)voice
- Ariane (2014), 15:0015 other instruments
- The Aristocratic Lover (1987)baritone-tenor, 4 mixed voices, oboe (English horn), 2 horns, piano, 4 violins, viola and cello
- fixed medium
- Arpège (1986)
- Arrangement of Morden (1992)clarinet, trumpet, piano, percussion and double bass
- Arraymusic Miniature (1991)clarinet, trumpet, piano, marimba, snare drum and double bass
- The Art of Fugue, BWV 1080 (1740-50)
