- Zedka (2017), 11:00pow wow, oriental tenor, Inuit throat singer, string quintet, kanoun, oud, jazz piano and 3 percussions
- Zefiro torna, e’l bel tempo rimena (1994), 10:30orchestra
- Zeitmaße, Nr 5 (1955-56)flute, oboe, clarinet, bassoon and English horn
- Zénith (1999), 14:31stereo fixed medium
- Zipangu (1977), 16:007 violins, 3 violas, 2 cellos and double bass
- Zipper Music II (1998), 7:21fixed medium
- Zomby Woof (1973), 5:00Arr. Walter Boudreau, 1984saxophone quartet
- Zomby Woof (1973), 5:00Arr. Walter Boudreau, 2010solo violin, 3 violins, 2 violas, cello, double bass and piano
- Zone grise (1989)flute and stereo fixed medium
- Zone V (2020), 12:00flute, clarinet, violin, cello, piano and percussion
- Zones (1971-72), 9:02stereo fixed medium
- Zones (1979)clarinet, horn, piano, vibraphone, violin, viola, cello and double bass
- Zooartefact #1 (2018), 5:00accordion and processing
- Zoom (1970)clarinet and percussion
- Zoom (2008)
- Zornmusik (2019), 11:006 comprovising instrumentalists (variable) with audioscores and projected soundfile
- Zukunftsmusik (1999), 30:00(procession, all players also roar, speak, whisper), soprano, English horn, trumpet, violin, double bass
- Zungenmusiken (2017), 65:004 singers and Ensemble Extrakte
- Zwei Lieder, op 8 (1910)soprano, clarinet (bass clarinet), horn, trumpet, harp, celesta, violin, viola and cello
- Zyklus, Nr 9 (1959)keyboards and percussion
