Editions Temperaments 
Ombres
for viola and piano
Ombres du Minotaure
Opéra pour un théâtre d'ombres 3...
Ombres Lumineuses
for flute, clarinet, violin, cello and...
Omeyotl - Duality
for Violoncello. Mesoamerican Rizomatic...
Omeyotl - Duality
for Viola. Mesoamerican Calendar.
Omniscience Is a Collective - Part IV
for vibraphone, cymbal (20’’), triangle...
El equipo de BabelScores le recomienda 
On Fire
pour, comédienne, piano, orchestre et...
On the Celestial Hierarchy
for flute, clarinet, percussion, piano,...
on the chances of María Palitos appearing in sight
for flute, bass clarinet, bassoon +...
DSS Edicije 
On The Lake
For Flute or Flute and Accompanying...
On the Ning Nang Nong
Where the Cows go Bong ! for double...
On Western Terror 8
Concerto for Taiko Ensemble, Percussion...
Edizione Suvini Zerboni 
Once back
per orchestra
El equipo de BabelScores le recomienda 
Once upon a time
for symphony orchestra
Portuguese Music Research and Information Centre 
once upon a time
for guitar
Edizione Suvini Zerboni 
One (I) for sale
per orchestra
One Minute is more than One Minute
for a group of people (at least five...
One word. Three syllables.
for voice, ensemble and tape
Opera in one act: The Harmfulness of Tobacco
for tenor and chamber orchestra
Edizione Suvini Zerboni 
Ora non è più dolce come prima
per orchestra
Oración en el huerto
for 12 string instruments on four poems...
Edizione Suvini Zerboni 
Orationes christi
per coro misto, ottoni, viole,...
ORAZIONE AI VIVENTI
Épître aux vivants Pour soprano solo
Edizione Suvini Zerboni 
Orbis tonorum
per orchestra da camera
ORFEO MIO VALE
Pour violon, violoncelle, contrebasse,...
Editions Temperaments 
Origen
duo de saxophone
Orpheus and the Cave II
For solo Trumpet, solo Oboe and two...
Orpheus Kristall
Chamber Opera with Internet Musicians...
Edizione Suvini Zerboni 
Orts
per 14 strumenti e lettore ad libitum
Editions Le Chant Du Monde 
ORTZI ISILAK
pour clarinette principale en sib et...
Os Circunvagantes (The Circumwanderers)
A sung pantomime in six scenes for...
Oscura raíz del sueño II
for baritone saxophone and percussion
Edizione Suvini Zerboni 
Oscuro pintado
per otto strumentisti
Edizione Suvini Zerboni 
OSSESSIONI DI PONTORMO
per due ensemble e percussioni
Edizione Suvini Zerboni 
Ossido
per sei percussionisti
