Künstler O
| Sarah O' Brien | Harfe |
| Jürgen Ochs | Tenor |
| Offenbacher Kammerorchester | Orchester |
| John Ogdon | Klavier |
| Jimin Oh-Havenith | Klavier |
| Opernchor des Deutschen Nationaltheaters Weimar | Chor |
| Oratorienchor Karlsruhe an der Christuskirche | Chor |
| Orchester der Städtischen Oper Berlin | Orchester |
| Orchestre de la Suisse Romande | Orchester |
| Orchestre Philharmonique de la RTF | Orchester |
| Orchestre philharmonique de Strasbourg | Orchester |
| Eugene Ormandy | Dirigent |
| Ósk Óskarsdóttir | Tenor |
| fr. Sebastian M. Ostmeyer OP | Tenor |
| Stefan Otters | Pauke |
| Lisa Otto | Sopran |