- Hollywood-Elegien (1942)
- I Saw Many Friends, 2:00
- HoMa (2007), 30:0024 wind instruments, 5 percussions and pipe organ
- guitar
- Hommage à Euler (1989)orchestra
- Hommage à György Ligeti (1985)2 pianos
- Hommage à Sainte-Cécile (1987)4 horns, 4 trumpets, 2 trombones, 2 tubas and 4 percussions
- Hommage à Vasarely (1977), 12:00orchestra
- Hommage à Wim Wenders (2004)saxophone quartet (SSTB)
- small ensemble and processing
- L’Homme et son désir, op 48 (1918), 20:004 voices, 12 instruments and 6 percussions
- Homonymy (1998), 11:11flute, oboe, clarinet, bassoon, horn, trombone, percussion, violin, cello, double bass and video
- Orch. Karel Goeyvaerts, 1980synthetizer and fixed medium
- Honour, 2:00voice and hand drum
- Horizo (2002), 20:0016 instruments and processing
- Horizon II (1981), 5:30oboe
- Horizons vertigineux (1978)piano
- Hotaru Koi (1987)
- Hozhro (1991-2008), 53:54soprano, soprano saxophone and string quartet
- Manifeste, 6:01
- Tremblement de tente, 2:23
- Restes de slogans, 3:11
- Phrases décousues, 2:25
- Entrée dans le sommeil, 1:18
- Re-synchronisation, 7:47
- Le shaman et l’âme, 2:26
- Duo à pas lents, 5:42
- Solfège, 2:44
- Île arc-en-ciel 2, 4:38
- Réveil, 2:16
- Huit études (2000), 15:001/16-tone piano
- HWY 2 (2000), 9:00
- Hymne pour Orford (2011), 3:00string orchestra and percussion
- Hymnen, Nr 22 1/2 (1966-67), 126:00soloists and 4-channel fixed medium
- Hymnen an die Nacht (1975), 6:00soprano and piano
- Hymnen an die Nacht (1975)Orch. Walter Boudreau, 2012 [original work]soprano, flute, oboe, percussion, piano and cello
- Hymns for the Drowning (2015)
- hyperboles 4 (“insomniac rain”) (2014), 15:00telescopic tu-yo, vibrating membranes, The Pipe and OverTone flutes
- Hyperprism (1923)flute, clarinet, 3 horns, 2 trumpets, 2 trombones and 16 percussions
- L’hypothèse Caïn (2018-19)opera
- Hypsotony (1989), 7:42string quartet
