Evening Sacrifice - B. Christoff and the Choir of the A. Nevsky Cathedral

Astounding work from the oktavist on this recording down to F#1. I suspect this may be the same Bulgarian oktavist we have heard with the Kaval Choir. This is the Choir of the Alexander-Nevsky Cathedral in Sofia, Bulgaria. It was released by EMI in 1978, but presumably released earlier on an undated LP in Bulgaria.