- On Top of Old SmokeyThe Shannon Singers
- Original Album SeriesThe Electric Prunes
- Ocean Waves (90 Minutes)God's Creation
- Out of HereThe Pioneers
- On Target (Bonus Track Version)The Jones Girls
- On TrialThe Pioneers
- On TargetThe Jones Girls
- One Original Step Beyond: The Story Of SkaThe Pioneers
- One Foot In The BluesJohnny Adams
- Opera House (歌剧院)Gepy
- OasisThe Session
- Only Want To Be With YouJohnny Adams
- Old SchoolCarlos Torre
- ORF Wetter-Panorama, Vol. 94Ausseer Bradlmusi
- OltretangoPaolo Russo
- Opus Mortis VIIIVomitory
- OmPanetoz
- On My WayPanetoz
- Old and New FriendsDavid Berkman
- Original Album ClassicsPatrik Isaksson
- Of Unknown OriginO.U.O
- Os Originais do Samba (Disco de Ouro)Os Originais Do Samba
- Os Originais do Samba (Disco de Ouro Vol.2)Os Originais Do Samba
- Os Originais Do SambaOs Originais Do Samba
- Os Originais do SambaOs Originais Do Samba
- Out of ExileStrahan
- Os Originais do Samba, Vol. 2Os Originais Do Samba
- Ontem, Hoje e SempreOs Originais Do Samba
- Os Bons Sambistas Vão VoltarOs Originais Do Samba
- Os Originais do Samba (Playback)Os Originais Do Samba
- Op Het Lijf GeschrevenJo Vally
- Omdat Ik Van Je HouJo Vally
- Outer SpaceIvan Guasch
- Opus SanctusOpus Sanctus
- One Last CallBen Böhmer
- Oliver Welke Dietmar Wischmeyer lesen: Frank Bsirske macht Urlaub auf KrkDietmar Wischmeyer
- One in a MillionDrumsound
- Over DanseLes Petits Pilous
- Ohne Jede Spur - Der Fall Der Nathalie B. (Original Soundtrack)Dürbeck & Dohmen
- Ostfrieslandkrimis (Ostfriesenschwur und Ostfriesenfluch (Original Soundtrack))Dürbeck & Dohmen
- Ostfrieslandkrimis - Ostfriesenschwur und Ostfriesenfluch (Original Soundtrack)Dürbeck & Dohmen
- O.utlet*Kostas
- OlderParcels
- OvernightParcels
- 별별 며느리 OST Part.1 (多样的儿媳 OST Part.1)표혜미 (表惠美)
- On & OffElectro Vision
- only child (feat. CHE)아프로 (Apro)
- 신라의 달밤 O.S.T손무현
- Our StoryKillabyte
- OpheliaShaylee (シェイリー)
- Orient ExpressTrio Macchiato
- Origami ArmiesIf Anything Happens To The Cat
- Otra CosaLuis Miguel del Amargue
- Old Time Rock & RollThe Ultimate Bob Seger Cover Band
- Oh MamaDavina Moss
- OpeningsChet Porter
- Out of the Dark - A Science Story in 15 Musical PicturesGB00six Project
- OnctionDJ Jacob
- OOIYF!!TP
- OrbitSlok
