- Organomehanizm
- Orchestre National De L'Ortf
- OR3O
- Orin
- oubert
- Orchestra Lunatica
- Owen Bradley
- Oak Shine
- OVSKY
- O.B
- overface
- offrami
- Ohio National Baptist Mass Choir
- Oonagh
- Oscuro
- OMFG 2
- Orphaned to Hatred
- OC
- Oceanlab
- Oxue
- Ollie Gabriel
- O.M.U.
- Oleg Pogudin
- Orquestra Os Jovens Do Prenda
- OBroject
- ONEWJ
- Of Machines
- Olwik
- Opram
- OVUM
- Owl Eyes
- Only Girl
- Organizacion Genesis
- Orchestra of the Mariinsky Theatre
- Ourselves Among Others
- Orkidea
- Orquesta Lírica de Barcelona
- Ode for Joe
- Olivier Alary
- Organ Grinder
- 欧阳来琴
- OMB Memo
- Orion's Gate
- Oziriz
- Oliver's Twisted Family
- Omarjan-Alim
- One Orphan More
- Orange Risdon
- Oleg Xaler
- Ork Mukish Bend
- O'Carolan
- Onuka
- Oscar JJ
- Original Paris Swing
- OGQ
- OKHUMAN
- Orquesta Bellaterra
- Osynthw
- 欧大大
- Orchestra of the Eighteenth Century
- Oscar Scheller
- Orget Sadiku
- Orquestra Imperial
- ONR
- Ops.7
- OTK-Silence
- Oscar Isaac
- Ocean 337
- Ooi
- Olle Persson
- Orchestre de la Société des Concerts du Conservatoire
- Orchestra Di Padova E Del Veneto
- Ohio Avenue
- Oliver Serano-Alve
- Oleg Kovinko
- dj欧东
- Otzzo
- Osshun Gum
- OttoWu
- Olli aka Mercy-1
- Orquesta del Desierto
- Oturans
- OVEROY
- okx
- Original Dub Master
- OBESØN
- 哦呼w
- Orquesta Club Miranda
- Oceantied
- Oryx
