- Arte! (2002), 14:00mixed chorus and orchestra
- artichoke silence (2008), 1:00pianoCycle: One Minute More
- 6 groups of spatialized instruments
- As the First Spring Blossoms Awaken Through the Snow (2021), 10:00sheng, flute, clarinet, santur, setar, oud, percussion, erhu, 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
- ASED (2021), 30:00 – 480:00variable instrumental and vocal ensemble, installation of 5 video and audio channels
- Ashram (1991), 9:20Arr. Ricardo Dal Farra, 2023multichannel fixed medium [dome]
- 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
- at rest and rushing (1995), 15:00soprano, narrator, clarinet, alto, harp
- Atashtatuk (2001)cello and processing
- Atem (1970)trombone
- Atemholen (Take a breath) (2014)saxophone quartet
- Atish-e-Zaban (2006), 65:006 a capella voices
- Atlantide (1985), 29:12voice, various ensembles, electroacoustic sounds and environmental sounds
- La création d’Atlantide, 1:36
- Le chant des Atlantes, 1:06
- Poséida (les royaumes), 1:51
- Nucléo, 2:22
- La guerre des royaumes, 1:36
- L’éternité dans l’abîme, 1:30
- Atlantide (1985)10 voices, saxophone quartet, brass quintet, 3 percussions, 2 MIDI keyboards, guitar (electric guitar + sampler), 5 string instruments, sequencer-controlled sampler and fixed medium
- Atlas (2006-07), 80:00audiovisual installationvideo
- Atlas Eclipticalis (1961-62), 40:00to eighty-six instruments and processing
- Atmintis (1991)voice, trombone, percussion and viola
- viola
