- O
- OO
- OO
- OO
- OO
- OafOak
- OaKObe
- OBEOBN
- ObnOca
- OcaOce
- OceOco
- OCSOct
- OctODD
- ODDODE
- ODEOdo
- OdoOf
- OfOff
- offOff
- OffOgr
- OGROH
- OhOhm
- OhmOiz
- OizOka
- OkaOkl
- OklOla
- OlaOld
- OldOld
- OldOle
- OleOli
- OliOli
- OliOlo
- OloOly
- OlyOm
- OmOme
- OmeOmn
- OmnON
- OnOne
- OneOne
- OneOne
- OneOne
- OneONL
- OnlOno
- onoOOJ
- OojOpa
- OpaOpe
- OpeOpp
- OppOra
- OraOra
- OraOrc
- OrcOrc
- OrcOre
- OreOrg
- OrgOri
- OriOri
- OriOrm
- OrmOrp
- OrpOrq
- OrqOrt
- OrtOsa
- OsaOsc
- OscOsk
- OskOSR
- OssOT
- OtaOti
- OtiOtt
- OttOtw
- OtwOur
- OurOut
- OutOut
- OutOut
- OutOVE
- OVEove
- Oveovr
- OvsOwe
- OweOxi
- OxiOza
- OzaOzo
- Ozoozz
- Orchardist, The (Nashville folk band)
- Orchards (band from Brighton, UK)
- Orchards (Alternative metal band from Dallas, Texas)
- Orchester der Bayreuther Festspiele, Böhm, Karl
- Orchester der Bayreuther Festspiele, Krauss, Clemens
- Orchester der Deutschen Oper Berlin, Jochum, Eugen
- Orchester der Vereinigten Bühnen Wien
- Orchester der Versöhnung, Das
- Orchester der Wiener Volksoper
- Orchester der Wiener Volksoper, Kantschieder, Paul
- Orchester Gino Mariano
- Orchester Reto Parolari
- Orchester Werner Tauber
- Orchestra
- Orchestra (Hot Spot Orchestra)
- Orchestra (For Now), The (art rock/progressive rock group)
- Orchestra Alec Medina
- Orchestra Bagutti
- Orchestra Baobab (Senegalese Afro‐Cuban band)
- Orchestra Capri
- Orchestra Città di Ferrara
- Orchestra del Maggio Musicale Fiorentino, Serafin, Tullio
- Orchestra del Teatro alla Scala di Milano, Giulini, Carlo Maria
- Orchestra del Teatro alla Scala di Milano, Serafin, Tullio
- Orchestra del Teatro dell’Opera di Roma
- Orchestra dell’Accademia Nazionale di Santa Cecilia, Chung, Myung-Whun
- Orchestra dell’Accademia Nazionale di Santa Cecilia, Pappano, Antonio
- orchestra di Piazza Vittorio, L’
- Orchestra Fireluche
- Orchestra Fireluche & Riba, Pau
- Orchestra Fuego
- Orchestra Harlow
- Orchestra Harlow & Miranda, Ismael
- Orchestra JB
- Orchestra Marrabenta Star de Moçambique
- Orchestra Marrabenta Star de Moçambique feat. Wazimbo
- Orchestra Morphine
- Orchestra Mozart
- Orchestra of Opera North, Daniel, Paul
- Orchestra of Spheres (New Zealand psychedelic)
- Orchestra of St. Luke’s, Adams, John
- Orchestra of St. Luke’s, De Waart, Edo
- Orchestra of St. Luke’s, Tilson Thomas, Michael
- Orchestra of Syrian Musicians, The
- Orchestra of the Age of Enlightenment
- Orchestra of the Eighteenth Century, Brüggen, Frans
- Orchestra of the Mariinsky Theatre, Gergiev, Valery
- Orchestra of the Mariinsky Theatre, Gergiev, Valery
- Orchestra of the National Music Institute, Seoul (aka. National Classical Music Institute)
- Orchestra of the National Music Institute, Seoul & Kim Ki-Su
- Orchestra of the Royal Opera House, Covent Garden
- Orchestra of the Royal Opera House, Covent Garden, Ermler, Mark
- Orchestra Pedro Gonez
- Orchestra Rosichino (Grande Orchestra Rosichino)
- Orchestra Spettacolo Casadei
- Orchestra Super Mazembe
- Orchestra Tomelleri, Paolo
- Orchestra, Andesian
- Orchestra, Bert Kaempfert
- Orchestra, Big Time
- Orchestra, Bone Poets
- Orchestra, Chennai
- Orchestra, George Williams
- Orchestra, Moka Efti (Music from the 20s)
- Orchestra, New England Irish Harp
- Orchestra, Puente, Tito's
- Orchestra, The (Copenhagen Jazz Orchestra)
- 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 l’Opéra national de Paris, Rosenthal, Manuel
- 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 du Soleil (associated with Ed Starink)
- Orchestre Ducoin
- Orchestre International du Vetex (Belgian brassband)
- Orchestre Makassy
- Orchestre Mont‐Blanc
- Orchestre National de Barbès
- Orchestre national de France (RTF / ORTF / Radio France)
