O Pastorelle, Addio SSA - Umberto Giordano, Arr. Emile H. Serposs
OMG! (#twitterlieder) - James Eakin III
O Meu Maracatu SATB - Daniel Afonso
Ogo Ni Fun Oluwa! SATB - Rosephanye Powell
O Setting Sun (A Whitman Triptych) - David Conte
Oberon SSATB - Reginald Unterseher
Nada Te Turbe SSAA - Joan Szymko
Oba Ti De SSAATTBB - Jeffrey L. Ames
O Salutaris Hostia SSAA - Frank Ferko
Nada Te turbe - Fabio Fresi
O Mary, Don't You Weep TTB - Arr. Rollo Dilworth
O Mary, Don't You Weep SSA - Arr. Rollo Dilworth
Oba Se Je - Christopher Aspaas
Of A Rose SATB - Tamsin Jones
O, She Doth Tecah The Torches To Burn Bright SSAATTBB - Eriks Esenvalds
N.Y.C. SATB - Arr. Mark Brymer
O-Yo-Yo - Arr. Stephen Hatfield
O Wusst' Ich Doch Den Weg Zuruck TBB - Johannes Brahms, Ed. James McCullough
O Whistle and I'll Come To Ye SATB - arr. Mack Wilberg
Oceans And Stars SATB - Amy Bernon
Odi Et Amo - Mark Templeton
O What A Beautiful City - Arr. Shawn Kirchner
Nunc Dimittis - Mark D. Templeton
Nunc Dimittis - M. Susan Brown
