- Aux premières lueurs (2014), 20:00string quartet and processing
- AuXauralités — Vers le cristal… (2021), 11:30fixed medium
- Available Forms I (1961)flute, oboe, E-flat clarinet, B-flat clarinet, bass clarinet, bassoon, horn, trumpet, trombone, harp, piano, 2 percussions, 2 violins, viola, cello and double bass
- Ave, Nr 58 1/2 (1984-85), 23:30alto flute and basset horn
- Ave Maria (1991)voice and guitar
- Avec, Wampum symphonique (1992)soprano, bass, narrator, four-voice chorus, clarinet, percussion, piano and string instrument
- Aventures en Orient (2010), 7:56chamber orchestra, shakuhachi (or flute) and eastern singer (or western singer)
- Axiom (2004), 13:00piano, clarinet, bassoon and trumpet
- Axiomoixa (2001)saxophone
- Axma (Relax) (2008)alto flute and fixed medium
- Ay, luna (1981), 6:00chorus
