- 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
- 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)
- Arte! (2002), 14:00mixed chorus and orchestra
- 6 groups of spatialized instruments
- As the first spring blossoms awaken through the snow (2020), 10:00sheng, flute, clarinet, santur, setar, string instrument, percussion, string instrument, viola and double bass
- L’Ascension (1932-33), 29:00
- Ascension, pente (2015), 5:538 cellos
- Aschenblume (2001), 18:00flute, clarinet, piano, 2 percussions, violin, viola, cello and double bass
- Asia (1928)orchestra
- L’asile de la pureté (2003)
- chorus and fixed medium
- Cortège funèbre, 1:57
- Apparition (Jeûne), 3:24
- Valse, 5:16
- Adieu, merle noir…, 5:26
- Assaisonnements orientaux (1992)2 violins
- Assemblages (1969), 8:25piano
- Assonance II (1989), 12:00bass clarinet
- Asymétries no 1 (1958), 6:00piano
- Asymétries no 2 (1959)clarinet and piano
- Atashtatuk (2001)cello and processing
