Le Mystère des Voix Bulgares - Bulgarian State Television Female Choir

I'm biased because I'm Bulgarian like the fine singers on this record but these polyphonic melodies and nuts-o times signatures represent the kinds of ancient, genuinely unique musical traditions that form at the edges of continents (Europe and Asia, in this case.)

Also, fun fact, a Bulgarian folk recording was included on the Voyager Golden Record that went into deep space in the 70s. So maybe the aliens already know about it? Also, how great is this album cover?