- O
- OO
- OO
- OO
- OOak
- OakOat
- OatObi
- ObiObs
- ObsOce
- OceOce
- OceOct
- OctOdd
- ODDOde
- OdeODO
- odoOes
- OesOff
- OffOff
- OffOgr
- OGROh
- OhOHN
- OHNOjb
- OjeOKA
- OKAokt
- OktOLA
- OlaOld
- OldOle
- OleOli
- OliOli
- OliOlm
- OlmOlv
- OlvOma
- OmaOme
- OmeOmo
- OmoOna
- ONBOne
- OneOne
- Oneone
- oneONG
- OngOnl
- OnlOnu
- OnuoOo
- Ope
- OpeOpi
- OpiOpu
- OpvOra
- OraOrb
- OrbOrc
- OrcOrd
- OrdOrg
- OrgOri
- OriOri
- Oriorm
- OrnOrp
- OrqOrr
- OrrOrt
- OrtOsb
- OsbOsc
- OscOsm
- OsmOst
- OstOTH
- OthOtr
- OtsOtt
- OttOur
- OurOut
- OutOut
- OutOut
- OutOve
- Oveove
- OveOVX
- OvyOwl
- OwlOxl
- OxlOzc
- OzcOzu
- Ozuozz
- Orchestraccia
- Orchestral Affair
- Orchestral Manoeuvres in the Dark
- Orchestre de l’Opéra national de Paris, Prêtre, Georges
- Orchestre de l’Opéra national de Paris, Prêtre, Georges
- Orchestre de l’Opéra national de Paris, Prêtre, Georges
- Orchestre de la Société des Concerts du Conservatoire, Auriacombe, Louis
- Orchestre de la Société des Concerts du Conservatoire, Cluytens, André
- Orchestre de la Société des concerts symphoniques de Paris, Leibowitz, René
- Orchestre de la Suisse Romande, Ansermet, Ernest
- Orchestre de la Suisse Romande, Ansermet, Ernest
- Orchestre de la Suisse Romande, Ansermet, Ernest
- Orchestre de Paris, Karajan, Herbert von
- Orchestre de Paris, Ozawa, Seiji
- Orchestre du Festival de Lucerne, Furtwängler, Wilhelm
- Orchestre Ducoin
- Orchestre International du Vetex (Belgian brassband)
- Orchestre National de Barbès
- Orchestre national de France, Bernstein, Leonard
- Orchestre national de France, Maazel, Lorin
- Orchestre National de Jazz
- Orchestre national de Lyon
- Orchestre national du Capitole de Toulouse, Plasson, Michel
- Orchestre National du Tatarstan
- Orchestre philharmonique de Paris, Cosma, Vladimir
- Orchestre philharmonique de Radio France, Järvi, Paavo
- Orchestre philharmonique de Strasbourg, Lombard, Alain
- Orchestre Révolutionnaire et Romantique, Gardiner, John Eliot, Sir
- Orchestre Royal de Chambre de Wallonie & Brossé, Dirk
- Orchestre symphonique de Montréal & Dutoit, Charles
- Orchestre symphonique de Montréal, Dutoit, Charles
- Orchid (American screamo band)
- Orchid (American doom metal group)
- Orchid (eldia associate)
- Orchid feat. Simply Funk
- orchid mantis
- orchid mantis & Fog Lake
- orchid mantis ft. sign crushes motorist
- Orchid Throne
- Orchidae (Yolande Laroche)
- Orchidelia
- Orchids, The (Sarah Records)
- Orchids, The (Kim Fowley managed group)
- Orchivion
- Orcivus
- Orcus (Philadelphia)
- Orcustus (Norwegian black metal)
- Ord, Boris
- Ord, Maren
- Ordeal, The (German heavy/power metal band from Hannover)
- ORDEM
- Orden Mundial
- Orden Ogan
- Orden Ogan feat. Diehl, Dennis
- Orden Ogan feat. Eriksson, Ylva
- Orden Ogan feat. Frank Beck & Thompson, Ross
- Orden Shiitake, La
- Ordén, Janne
- Order (Norwegian Black Metal)
- Order From Chaos
- Order of Apollyon, The
- Order of Elijah, The (Joplin, MO)
- Order of Ennead
- Order of Israfel, The
- Order of Nine
- Order of the 12, The (group led by Richard Norris)
- Order of the Ebon Hand (Greece / Black Metal)
- Order of the Fallen
- Order of the Fly, The
- Order of Týr
- Order of Voices
- Order, The (Hard 'n' Heavy, Switzerland)
- Order89 (Parisian darkwave trio)
- Ordge, Jimmy Arthur (Canada)
- Ordher, The
- Ordinaires, The (USA band)
- Ordinance (USA progressive death metal)
- Ordinarius
- Ordinary Boys, The
- Ordinary Elephant
- Ordinary People (New Jersey)
- Ordinary Peoples
- Ordinary Surfers
- Ordinary Time
- Ordinul Negru
- Ordo Equilibrio
- Ordo Equitum Solis
- Ordo M’era Luna
- Ordo Rosarius Equilibrio
- Ordo Rosarius Equilibrio feat. Spiritual Front
