- Oslofjord kammerfilharmoni
- Op Ed
- Oompzel
- Onaana Gh
- Orchestra Sinfonica Radio Italiana
- Ocean Bank
- ostubash
- OP1.Production
- Ozlo
- Owenzy
- One Tusk
- Orchestre de la Fondation Gulbenkian de Lisbonne
- Orchestre Philharmonique De Monte-Carlo
- Oliver Torr
- Olga Choren - Y Tony Alvarez
- Oscar Calle et son orchestre
- 欧阳夏
- 欧阳尐靖
- Otowala
- Ozgur Bilgin
- Oseeola
- Omaru
- Oden
- Organ Tapes
- Oceans Ate Alaska
- Offaudio
- Orangentle
- Out of Sorts
- OBJ
- Outter Sphere
- Onirik
- 欧邦聪、小豚豚、小可2
- One Up Downstairs
- Oulaya
- Orquesta Héctor d'Espósito
- oskalizator.
- Orchestra simfonică şi Corul Filarmonicii din Cluj-Napoca
- okami Ken
- OLM kinG
- One Billion Conveyor Belts
- Overheads
- Orchestre à cordes de la Garde Républicaine
- Omega X D
- One Ton Project
- Oh My Darling
- On iQ
- OZCO
- Octosimbu
- Opalye
- Octopuses
- Orquesta kalipso
- Oscar James and The Ravers
- Onyx Collective
- OodaLo
- Oddpopp
- Otive
- Original Film Soundtrack
- Olga Polikowska
- Orgel Hymn
- Oimself.
- Only Fire
- Outdoor Piano Party
- 欧润汁rr
- Orquesta Sinfónica
- Outside the Circle
- OBI ALI
- Olaleo
- Ox Cohen
- Ogcweez
- Ottar Wiik
- Oliver Knussen
- OskarAlgarete
- Opal Touch
- Ochman
- Olivia Clarke
- O G Mage
- Oh Snap It's Luke!
- Organizacion Apache 16 De Gerardo Magallon Jr
- O∩_∩O
- Our Alwayz
- Optick
- Ohad Talmor Newsreel Sextet With Dan Weiss
- OGQuavo
- Ou ni Jiang
- Orel Cohen
- Old Sea Legs
- Oddplay
- Olivia Roth
- OBlood247
- Orgater
