Oratnitza
Artist with "Folktron" album

Oratorijski zbor crkve sv. Marka
Artist with "Rodio se Bog - Hrvatske Bozicne Pjesme" album

Oratorio
Artist with the following albums: "Redemption", "Huuto EP", "The Reality of Existence", etc...

Oratorio Choir and Orchestra
Artist with "Oratorio on the Live of Christ" album

Oratorio della SS.Vergine - Ezechias
Artist with "Oratorio della SS.Vergine - Ezechias" album

Oratorio Don Bosco Sor Ma. Romero _ Miguel Magone
Artist with "" album

Oratorio S. Filippo Neri
Artist with "Francesco... di traverso" album

Oratorio Society of Minnesota
Artist with "Elegy to Life" album

Oratorio Society of New York
Artist with "Handel's Messiah Highlights" album

Oratorio Society of Utah
Artist with "Vivaldi's Gloria - Handel's Messiah (selections)" album

Oratorio The World God Only Knows
Artist with the following albums: "God only knows ～集積回路の夢旅人", "A Whole New World God Only Knows", "God only knows??????????", etc...

Oratorium
Artist with the following albums: "Zagrajcie nam dzisiaj srebrne dzwony", "Tu Es Petrus", "PANIE RATUJ SWIAT", etc...

Oratorium Oświęcimskie
Artist with "Oratorium Oświęcimskie" album

Oratory
Artist with the following albums: "Beyond Earth", "Interludium", "Illusion Dimensions", etc...