The "Mystery of Bulgarian Voices" is a renowned female vocal choir from Bulgaria that gained international acclaim for its unique sound and traditional folk music. Founded in 1952, the choir combines traditional Bulgarian singing styles with modern arrangements, showcasing complex harmonies and rich vocal techniques. The choir's music often features traditional instruments and is rooted in the folklore of Bulgaria. Their performances have captivated audiences worldwide, leading to collaborations with various artists and appearances in films and commercials, further popularizing their distinctive sound.