- Acht Flöten Fest für Robert Aitken in Freiburg (2004), 3:308 flutes
- Acousmie (1971)flute, clarinet, piano (celesta), 4 percussions, viola and cello
- Adagio (1986), 14:34flute and stereo fixed medium
- Adagio in
G minor for violin, strings and organ continuo [arr for organ] (1945)Arr. anonymousorgan - Adieu, Nr 21 (1966), 15:00wind quintet
- ADN 0,5% (2019), 15:00saxophone quartet
- Adonwe (1994), 26:00piano and chamber orchestra (22 musicians)
- Adoro te devote (1990)organ
- Advaya (1980)voice and piano
- Aérophonie (2009, 12)wind quintet
- Affettuoso (1973)piano
- Afterdreamlingly (1995-96)soprano, flute, clarinet, horn, piano, percussion, violin and cello
- The Age of Wire and String (2004), 15:006 musicians
- violin and fixed medium
- Ah quelle beauté! (2011-12), 38:00Charles Baudelaire, Denis Gougeon / Blaise Cendrars, Danièle Panneton, Pierre de Ronsard, Kurt Schwittersstring quartet and actress
- Aichingerlieder (2019), 12:00voice and processing
- Aikea (1980), 22:00Orch. Pierre BélusepercussionOriginal work: Cinq chansons pour percussion
- qanun and orchestra
- Ainsi la nuit (1976-77), 18:00string quartet
- Air Jam (2015), 15:00solo wind instrument, telescopic tu-yo, vibrating membranes, The Pipe and OverTone flutes
- Airs d’Espagne (1992), 15:00string orchestra
- Airs d’Espagne (1992)Orch. Louis-Noël Fontaine, 2017piccolo, 2 flutes, oboe, bassoon, 3 clarinets, bass clarinet, 2 alto saxophones, tenor saxophone, baritone saxophone, 3 trumpets, 2 horns, 3 trombones, euphonium, tuba, electric bass, timpani and percussionOriginal work: Airs d’Espagne
- Airs et nuits (2001)
- Akheta’s Blues (2012, 13), 9:1416-channel fixed medium (Klangdom)Cycle: Nano-Cosmos
- Akrata (1964-65), 11:00piccolo, oboe, B-flat clarinet, E-flat clarinet, bass clarinet, bassoon, 2 contrabassoons, 2 horns, 3 trumpets, 2 trombones and tuba
- Alaap for Ashak (2011)
- Alap et Gat (1998), 15:00orchestra
- horn, cello and piano
- Alchera (1972-73), 15:00mezzo-soprano, flute (piccolo), clarinet, trombone, violin, cello, electric organ (Hammond), fixed medium and lights
- L’alchimie de Psyché (2007), 13:00viola da gamba and processing
