- oxqo
- Orchestre Sud Americain Jose Lucchesi
- Orchestra "I Pomeriggi Musicali" di Milano
- Oblivion Ensemble
- Omar Galal
- Offside Lane
- Old Jim
- 欧阳建豪
- Olden Yolk
- Owol
- Oroto
- ONEICE-BEAR欧霓士熊
- Olga Thomas
- Orquesta Lírica Bellaterra
- Oslo Parks
- Old JΩhn 『J.W.』
- OPQ
- O Mama
- Office Desk
- osquinn
- Olivier Vernet
- oT_To
- Okzbagz
- 欧巴
- okuni*
- Outside Duo
- Oyinda
- Out of Flux
- oXu
- Oliver Black
- Otanbek Ensehan
- OZE
- Oren Eytan
- One Strike
- 欧巴尚青
- OAO
- Oleska
- Orchester der Wiener Akademie
- Our Girl
- Orquesta LA REBELION
- Old School Freight Train
- Oriana
- Og Buda
- Olympia Brass Band
- Ollie Joseph
- Olly Chalk
- Organo Musical Alex y La Huella
- Osterreichischen Salonisten
- 讴洋
- One Hundred Years
- okayokayokay
- Owntrip
- oddlyEDM
- Osier
- Oxygene
- Official Odbeats
- Oldwun
- Orchestre de balalaïka Saint-Georges
- Oppositionist Brother
- Oleg Farrier
- O'Flynn
- Original God
- Othmar M.F. Mága
- Opsat
- Os Meninos do Oeste
- Omerta KD
- Orchester Der Wiener Volksoper
- off1k
- OIHENART
- Obsidian.k
- Orlando Luckey
- Ohmien
- Olle Olson
- ORDER
- Otuz Rute
- ohm waves
- Orkiestra Teatru Narodowego
- Octale
- Our Mountain
- Orchestra of Collegium Vocale
- OG Ron C
- Out of Berlin
- Oxio
- One Man Click
- 欧阳聪
- 欧阳
- Otto Harwicke
- Orc
- Orchestra da Camera Fiorentina
- OU.yc-
