- O
- OO
- OO
- OO
- OO
- OOak
- OakObe
- ObeObl
- OblOb
- ObvOce
- OceOch
- OchOct
- OctOdd
- OddOde
- OdeOdi
- OdiODZ
- ODZOfe
- OfeOff
- OffOgb
- OgbOh
- OhOha
- ohaOi
- OiOjo
- Ojooka
- OkaOku
- OkuOla
- OlaOld
- OldOle
- OleOle
- OleOli
- OliOli
- OliOls
- OlsOMA
- OmaOma
- OmaOme
- OmeOmn
- OMNON
- ONOne
- OneOne
- OneOne
- OneOne
- OneONL
- ONLOno
- Onoooe
- oofOpa
- OpaOpe
- Ope
- OppOr
- OrOra
- OraOrb
- orbOrc
- OrcOrd
- OrdORG
- OrgOri
- ORIOri
- OriOrl
- OrlOro
- OroOrq
- OrqOrt
- OrtOry
- OryOsb
- OsbOse
- OSEOsm
- Osm
- OstOte
- OteOto
- OTPOtt
- OttOub
- OubOur
- OurOut
- OutOut
- OutOut
- OutOve
- OveOve
- OveOwa
- OwaOWI
- OwiOxi
- OxiOza
- OzaOzo
- OzoOZZ
- orbital voices
- Orbital, Sleaford Mods
- Orbiter (Stephen Walking & 7 Minutes Dead)
- Orbiter (indie rock band from Boston)
- Orbiting Human Circus
- Orbits (Norwegian band featuring members of Jaga Jazzist and Neon Ion)
- Orbits, The (1950s US doo-wop group from Hartford, CT)
- Orbits, The (a.k.a. The Laurels, 50s doo-wop)
- orbitt, Riku Matsushima, Timbre, the Carrier, Dari
- ORBO & The Longshots
- ORBS
- Orbweavers, The (Melbourne Band)
- Orc (progressive metal band from Lansing, MI, USA)
- Orca (UK early 1990’s breakbeat production duo)
- Orca (Psychedelic trance artist)
- Orca (portuguese group)
- ORCA (The Metal Rock Summer Festival)
- Orca Eroticae
- ORCALAND
- OrcaMind
- Orcas
- 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 Franco Bagutti
- Orchestra Fuego
- Orchestra Harlow
- 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
- 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 U.S.A.
- 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)
