Le Mystere Des Voix Bulgares
Biography
Le Mystère des Voix Bulgares (translated as "The Mystery of Bulgarian Voices") is a compilation album of modern arrangements of Bulgarian folk songs featuring, among others, the Bulgarian State Radio & Television Female Vocal Choir, with soloists Yanka Rupkina, Kalinka Valcheva and Stefka Sabotinova; and the Filip Kutev Ensemble.
Bio from Wikipedia