- Sofia Priest Choir
- Novospassky Monastery Choir/Igumen Mitrofan
- PaTRAM Institute Singers & Peter Jermihov
- PaTRAM Institute Male Choir & Vladimir Gorbik
- Sofia Boys' Choir. & Adriana Blagoeva
- Igor Ushakov, Men's Choir of the Valaam Singing Culture Institute, V. Starodubtsev, V. Felyauer, A. Ushakova, V. Miller & A. Gorbatenko
- Cappella Romana & Alexander Lingas