Artiesten & uitvoerders
 | O'Brass trompet, trombone, bastrombone, bastuba, hoorn, nkoni, slaginstrumenten | | Eugene O'Brien blues banjo |
|---|---|---|---|
| The O'Haras surfrock |  | Oaktree electronica |
 | Obatala Wereldmuziek |  | Oberon Consort barok, oude muziek |
 | Oberon Strijkkwintet Klassiek |  | Oblomow kleinkunst, hedendaagse folk |
 | Oboefolia barok |  | Octocelli 20ste eeuw, romantiek, classicisme |
| Octophoros classicisme, romantiek |  | Octopus Klassiek |
 | Octurn free & experimental jazz, fusion |  | Lola Oduwole Klassiek zang (sopraan) |
| Jan Oelbrandt Pop / Rock, Jazz gitaar | | Off The Record pop, Rock / Alternative |
| Antoon Offeciers pop, Rock / Alternative, singersongwriter keyboards, accordeon |  | Officer Jones and his patrol car problems hardrock / metal / hardcore, Rock / Alternative |
 | Oh Deer singersongwriter |  | Denis Olaerts Folk, Wereldmuziek, barok doedelzak |