| | - Old Glory & The Black Riviera
- Olafur Arnalds & Talos
- One Direction
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- The Orb featuring David Gilmour
- Omarion
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- Orchestral Manoeuvres in the Dark
- Olafur Arnalds & Alice Sara Ott
- Old Crow Medicine Show
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- The Outfield
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- The Ocelots
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- The Ozark Mountain Daredevils
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- Ought
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- Our Girl
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- The Oh Hellos
- Otis Redding & Carla Thomas
- Ofege
- Oran "Juice" Jones
- The Orb
- The Oscar Peterson Trio
- Oscar and the Wolf
- Olga Anna Markowska
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- The Only Ones
- Orden Ogan
- One Way
- Operation: Mindcrime
- Old 97's
- One EskimO
- Oneohtrix Point Never
- Ohio Players
- Ofdrykkja
- Overkill
- Oonagh
- of Montreal
- Offset
- Ozomatli
- Orishas
- Oh Laura
- Ojos de Brujo
- Oliver Nelson
- OSI
- Oberhofer
- The Osmonds
- Orange Goblin
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- Olli Schulz
- Orange Juice
- Oded Tzur
- Obadiah Parker
- Otherwise
- Onyx
- Ozma
- Otis Taylor
- Oleander
- Operator Please
- Orchestra of the Swan
- Omnimotion
- Octarine Sky
- Outfit
- Oren Lavie
- Ozuna
- Ottmar Liebert
- Oliver Anthony Music
- Our Promise
- The Olms
- October Drift
- Omar & The Howlers
- Out of Eden
- Omni Trio
- Orbit Culture
- Oscar Peterson
- Orcas
- Oddisee
- OPM
- Orchestra Baobab
- One Desire
- Of Blood and Wine
- Otep
- OLI
- Omar Dykes
- The Ocean
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- One Dove
- The Olympics
- O.C.
- The Orielles
- Oli Brown
- One Be Lo
- The Outsiders
- Oso Oso
- Oscar Lang
- Oi Va Voi
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- The Oak Ridge Boys
- Our Native Daughters
- ORANGE RANGE
- Oliver Koletzki
- Oxford Collapse
- Obituary
- Oh Susanna
- The Ocean Blue
- Otis Rush
- Over the Rhine
- Omar Apollo
- Our Broken Garden
- Olivia
- Oliver Cheatham
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- Operator
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- Oceana
- Oceansize
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- Olivia Chaney
- Olivia Ruiz
- Office Dog
- Ocean
- Odd Future Wolf Gang Kill Them All
- Osibisa
- Orla Gartland
- Oceans of Slumber
- Opus III
- Oh No! Oh My!
- Opius
- Oumou Sangare
- Oh the Larceny
- Oracle Sisters
- Om
- Oysterhead
- One Self
- ORF Vienna Radio Symphony Orchestra & John Jeter
- Ola Kvernberg
- Ohrenfeindt
- Otis Rush & Friends
- Old Man Luedecke
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- Olivia Holt
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- Orquesta Akokan
- Oscar
- Orpheus Nine
- Orpheus
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- The Olympians
- Our Last Night
- Oliver
- OnAir
- Oathbreaker
- Omar Rodriguez-Lopez
- Overcoats
- Outlasted
- Onita Boone
- Ocean of Grief
- ONE OK ROCK
- Omar Sosa & Seckou Keita
- OFF!
- Opus
- Only Men Aloud
- Omni
- Omnium Gatherum
- Otis Grand
- oOoOO
- Otoboke Beaver
- Orgone
- O.Children
- Olivia Belli
- Objekt
- Oscar D'Leon
- Oceans
- Ona
- One For All
- Olga Scheps
- Overhead
- One Way Ryde
- Oomph!
| - Onslaught
- Ocean Alley
- Old Mrs. Bates
- Open Mike Eagle
- Orchid
- Odie
- Otis Gibbs
- Olga Pashchenko
- Otis Stacks
- The Obsessed
- Orlando Weeks
- Oum Shatt
- Olivier Libaux
- Our Hollow, Our Home
- Oh My!
- Obscura
- Oh Hiroshima
- Onlap
- Old Gods of Asgard
- Olof Arnalds
- Oliver Mtukudzi
- Odyssice
- Orphaned Land
- Ornette Coleman
- Opera Diabolicus
- Olivia Broadfield
- Ornette
- Organized Konfusion
- Ott
- Oliver Schories
- Oliver Huntemann
- Oh Pep!
- Oregon
- Oliver Wakeman with Steve Howe
- Omer Klein
- OAK
- Oscar Jerome
- One More Girl
- Operus
- Ou est le swimming pool
- The Original 7Ven
- OHMME
- Owen
- OCS
- Ophelie Gaillard & Pulcinella Orchestra
- Omar Kent Dykes & Jimmie Vaughan
- Omar
- Oneman
- Oscar Brown Jr.
- Outshine
- OTR
- Old & In the Way
- Os Mutantes
- Ozark Henry
- Oh, Sleeper
- Obiat
- Otto Klemperer
- The Offering
- October Fall
- Oblivion Sun
- Orange Blue
- Owen Temple
- The Orange Peels
- Oceans Ate Alaska
- Ohtis
- The One Hundred
- Oh No Ono
- Omar Sosa
- Omar Coleman
- O.R.K.
- Ominum
- Oliva
- Oren Ambarchi
- Old Man Wizard
- Obits
- Otis Kane
- Out Hud
- Ohm Guru
- Orba Squara
- Opal
- Oliver Heldens
- Olav Larsen & the Alabama Rodeo Stars
- Oshun
- Ottoman Turks
- Old Man Jasper
- Otis Spann
- The Oath
- Oysterband
- OTTA-Orchestra
- Once Human
- Outrun the Sunlight
- The Orchids
- O+S
- Ost & Kjex
- The Octopus Project
- Otmar Suitner, Staatskapelle Berlin
- Ola Gjeilo
- Owel
- Official Secrets Act
- Ossuarium
- Oxia
- Old Sea Brigade
- Oxide & Neutrino
- Owiny Sigoma Band
- Oh No Not Stereo
- Orquesta Del Tango De Buenos Aires
- Oakley Hall
- Orion's Reign
- Oddgeir Berg Trio
- Oesch's die Dritten
- Oblivians
- Otta
- Ojerime
- Ocote Soul Sounds & Adrian Quesada
- Oscar Peterson, Ray Brown & Milt Jackson
- Old Salt Union
- The Other Half
- Oneida
- Omar Khorshid
- Omen
- OxT
- Outer Spaces
- The Olivia Tremor Control
- Oranssi Pazuzu
- Omnia
- Operators
- Opus 5
- Omega
- Ola Podrida
- The Organ
- The O.C. Supertones
- One Second Bridge
- Olli Ahvenlahti
- Off With Their Heads
- Outworld
- Outlands
- Orion the Hunter
- October Falls
- O'Death
- Okta Logue
- The One AM Radio
- Ocote Soul Sounds
- Otros Aires
- Obvurt
- Olin & The Moon
- Oliver Shanti
- Oche
- Orchestra dell'Accademia Nazionale di Santa Cecilia, Antonio Pappano
- On An On
- Of Virtue
- O'Shea
- Onward
- Okay Kaya
- Orions Belte
- Olivia Wendel
- Ollabelle
- Odetta Hartman
- The Ornette Coleman Double Quartet
- Old Man Markley
- Oz Noy
- One Less Reason
- Operatica
- Ovlov
- Orchestre Poly-Rythmo
- The Other Two
- The Orange Humble Band
- Or, The Whale
- Old Man's Child
- Oforia
- One True Pairing
- Orrin Evans
- Outlaw Blood
- Octopus
- Olivia Lane
- Orlando Julius
- Olivia O'Brien
- Orphaned Land & Amaseffer
- Olatunji!
- One-Way Mirror
- Odds
- Obliteration
- Orenda Fink
- Old and New Dreams
- One More Time
- Omar Vacel
- Onetwo
- OperaBabes
- Othello & The Pocket Change Band
- Odd Nosdam
- Odonis Odonis
- Ormonde
- The O Band
- Outloud
- Opio
- Outlawz
- Obscure Infinity
- The Old Ceremony
- Origin
- The O'Reillys and The Paddyhats
- October Project
- O
- Of Modern Architecture
- Obsequiae
- One Voice Children's Choir
- Opera Multi Steel
- Okilly Dokilly
- Old Canes
- The Old Firm Casuals
- Oriol
- Olu Dara
- Osukaru
- ohGr
- ONWE
- Originoo Gunn Clappaz
- One to One
- October Country
- Ookay
- Odette
- Oka
- Ocean Grove
- Out Of This World
- Otis Clay
- One Minute Silence
- Oddarrang
- Ol' Rattlebones
- OOIOO
- Orchestra del Teatro alla Scala di Milano & Claudio Abbado
- Osada Vida
- Oh Boy Les Mecs
- Overdrive
- Omega Infinity
- Oresund Space Collective
- Oluwadoe
- Orchester der Deutschen Oper Berlin, Giuseppe Sinopoli
- Ole Borud
- Ornella Vanoni
- O'Brother
- Odious Mortem
- Our Darkest Days
- Oval
- Olden Yolk
- Off Road Minivan
- Only Crime
- Ogre
- On Thorns I Lay
- Old Man Gloom
- The Open
- One Eleven Heavy
- Octo Octa
- Old Haunts
- Osmo Ikonen
- OVERWERK
- Orang-Utan
- Outrage
- Opie and Family
- Oozing Wound
- Oh No
- The Orchestra of Syrian Musicians
| - Ostura
- October Tide
- Odawas
- Orphans of Dusk
- The Overseer
- The Other Tribe
- O'Donel Levy
- Ohm-G
- One Without
- Off the Cross
- Otto Klemperer, Philharmonia Orchestra, Elisabeth Schwarzkopf
- Ohana Bam
- Outer Heaven
- Omar Rodriguez Lopez
- Oni
- Outshyne
- Ouroboros
- Oshima Brothers
- Oneness of Juju
- Oceanlord
- One 2 Many
- Oceano
- Opium Warlords
- Oliver Shanti & Friends
- Ours
- Osiris
- Outline in Color
- Orchestra and Chorus of the Royal Opera House, Covent Garden & Sir Georg Solti
- Orchestra and Chorus of La Scala, Carlo Sabajno
- Outside
- Orchestra and Chorus of the Welsh National Opera, Richard Bonynge
- Orquestra Was
- One-Eyed Doll
- Olivia Nelson
- Ov Sulfur
- OMBIIGIZI
- Organectomy
- Olivia Jean
- Over The Ocean
- Outrageous Cherry
- Othello
- Obey The Brave
- Oxbow
- Oxmo Puccino
- Ophiocordyceps
- The Owls
- Orka
- Out of the Grey
- Omnihility
- One for the Team
- One Way Ride
- Otto Klemperer, New Philharmonia Orchestra
- Old Man River
- Ostrich
- Odium
- Orchestra of Spheres
- Owen Campbell
- Outre-Tombe
- Osmani Garcia
- Otto Klemperer, Wiener Philharmoniker
- Orange Sunshine
- The Otolith
- The Out Crowd
- Orchestra and Chorus of The Royal Opera House Covent Garden, Richard Bonynge
- Oxo 86
- Owls
- Organic Pulse Ensemble
- Omar S
- Onda Vaselina
- The Ornette Coleman Trio
- Obywatel G.C.
- The Oscillation
- Olga Kouklaki
- The Order of Elijah
- Osunlade
- Oxford Circle
- One Bad Son
- Olympia
- Ortolan
- Officers
- Opgezwolle
- Olusheyi Banjo
- Olly Anna
- OTEO
- Osiah
- Overseer
- Ooh La La
- Optimo
- Oedipus
- Oboise
- Ola Onabule
- Ohenry
- Opprobrium
- Octavia Yearwood
- Only Child
- Orthodox Celts
- Otzeki
- Olivia Pedroli
- Organic Grooves
- Osanna
- Orwell
- Octavia Sperati
- The Opposites
- Olympos Mons
- Omega Massif
- Orchestre de l'Opera de Paris, Pierre Boulez
- Oophoi
- Odd Couple
- Opineismyname
- Otargos
- Osamu Kitajima
- ONETWOTHREE
- Omnizide
- Oophoi & Louisa John-Krol
- Onesidezero
- Ostrogoth
- Onyx Collective
- On Fillmore
- The Organization
- Ophidian I
- Of Eyes That See
- Original Flavor
- O'Hooley & Tidow
- oddCouple
- OHHMS
- OuterSpace
- Obelyskkh
- Ola Szmidt
- ONBC
- Oakenshield
- Oliver Haidt
- Oureboros
- One House Worship
- Old Time Relijun
- Onkel Tom Angelripper
- Oscar + Martin
- Oxmo Puccino & The Jazzbastards
- Orne
- Ohbijou
- Orient Fall
- Otto
- Open Hand
- Orup
- Omega Lithium
- One Ton
- Orlik
- Owane
- Okay City
- Onra
- Old Man's Will
- Os Golpes
- Os Pontos Negros
- Olli Banjo
- One Man Army
- Oakalla
- Oslo Swan
- Oceans Divide
- Ordog
- Ofrin
- Organix
- Old Funeral
- Okoume
- Opera IX
- Omar Codazzi
- On Watership Down
- Outline
- Oophoi & Tau Ceti
- Os Paralamas do Sucesso
- O Rappa
- Organissimo
- Odd Squad
- On a Pale Horse
- Olivier Le Goas Quartet
- Orange Range
- O.B. Buchana
- Otomo Yoshihide, Bill Laswell, Yoshigaki Yasuhiro
- Oblique Rain
- Overdose
- The Operation
- Officium Triste
- Okay
- Obscurity
- Oskar Linnros
- O'Ryan
- Old Wives
- One Man Army & The Undead Quartet
- Oya
- Overdream
- Oddjob
- Ocha la Rocha
- Obfusc
- Old Fire
- Overnight Lows
- onelinedrawing
- Omotai
- Odd Project
- Odjbox
- Out Cold
- Oogee Wawa
- Odyssea
- Oslo 13
- Olin and the Moon
- Obi Fernandez
- Okera
- Ondskapt
- Onry Ozzborn
- Ocultan
- Ott Lepland
- Oholics
- Outcast
- Of Machines
- Open the Skies
- Onkel Kankel
- Osten med Resten
- Orth
- Oliver Hart
- Ordo Funebris
- Opensouls
- Our Subatomic Earth
- Order of Ennead
- Orcustus
- One Hundred Hurricanes
- One the Juggler
- Outlaw
- Orange
- Overshift
- Oddrapod
- Onyx Key
- OU
- Orquesta del Sol
- Orion Sun
- Ono Loco & Lil Toro
- Obongjayar & Sarz
- Oxygene
- Ortel
- Oz
- Only Living Witness
- Old Hundred
- Oiro Pena
- Oxiv
- The Original Sinners
- On Hollow Ground
- Out of Orbit
- Oood
- Omar Cunningham
- Officer!
- One Step Closer
- Ole ohne Kohle
- Orthodox
- The Ongoing Concept
- Odd Nordstoga
- The Overlords
- Oath of a Traitor
- O.C. & PF CUTTIN
- Orphalis
- Oldfodt
- Olivia Rox
- Ogris Debris
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