
O Lord of Hosts, Tone 8
Bulgarian Byzantine Chant
Traditions of Byzantine Singing: Serbian, Bulgarian, Greek
Choir of Priests of Sophia

O Lord, Save Thy People
Byzantine Chant
Supplication Canon (Paraklesis) to Panaghia Paramythia
Choir of the Brethren of the Monastery of Vatopedi on Mt. Athos

O Thy divine and beloved..
Byzantine Chant
Choir of the Brethren of the Monastery of Vatopedi on Mt. Athos

O Victorious Leader
Serbian Chant
Traditions of Byzantine Singing: Serbian, Bulgarian, Greek
Brotherhood Choir of Holy Archangels Michael and Gabriel Monastery

O Victorious Leader, Tone 8 (melismatic)
Bulgarian Byzantine Chant
Traditions of Byzantine Singing: Serbian, Bulgarian, Greek
Choir of Priests of Sophia

Oh, Taste and See
Znamenny Chant
Christmas and Easter Chants of the 16th-17th centuries
Russian Patriarchate Choir

Oikos 1 and Kontakion 13 of the Akathist
Bulgarian Byzantine Chant
Traditions of Byzantine Singing: Serbian, Bulgarian, Greek
Choir of Priests of Sophia

Open to me the doors of repentance
Suprasl' Monastery Chant
Thou Who Art Filled With Light
Festal Choir of the Most Gracious Savior Monastery: Yekaterinburg

Our Father
Zakaria Paliashvili: Georgian Sacred Chants for the Liturgy of St. John Chrysostom
The Capitol Hill Chorale

Paschal Gospel and Paschal Beginning
Bulgarian Byzantine Chant
Traditions of Byzantine Singing: Serbian, Bulgarian, Greek
Choir of Priests of Sophia