Pieces: O
- O Come All Ye Faithful Traditional English David Willcocks (arr)
- O Come Let Us Sing Unto the Lord Egil Hovland
- O Frondens Virga Hildegard von Bingen
- O Jesus, Sweet Child (O Jesulein Zart) Traditional German Winnie Brückner (arr)
- O Lacrimae Amare Bianca Maria Meda
- O Little Town of Bethlehem Lewis Redner Susan Edwards (arr)
- O Magnum Mysterium Guy Forbes
- O Magnum Mysterium Ivo Antognini
- O Magnum Mysterium Jacob Handl
- O Magnum Mysterium Santiago Veros
- O My Dear Heart Eleanor Daley
- O My Deir Hert Rupert Lang
- O Nata Lux Christian Bährens
- O Sister (Keep Me Steady Through the Storm) Kathleen Allan
- O Strong of Heart Gustav Holst
- O Vas Nobile Susan Evans
- O Virtus Sapientiae Karen P. Thomas
- O Vivens Fons Hildegard von Bingen
- O Waly, Waly Traditional English John C. Phillips (arr)
- O-Yo-Yo trad. Quebec folksong Stephen Hatfield (arr)
- Ob-la-di, ob-la-da Lennon and McCartney Ron Smail (arr)
- On Christmas Cassie Luftspring (arr)
- On Suuri Sun Rantas Autius Traditional Finnish Matti Hyökki (arr)
- Once in Royal David’s City Traditional English David Willcocks (arr)
- One Voice Ruth Moody
- One With The Wind David O
- Os Justi Eleanor Daley
- Otche nash Aleksandr Kastalsky
- Owt of Your Slepe Anonymous
- Oxen, The Benjamin Britten
Canadian Work