Bulgarian Choral Singing

So I apologize about not posting much this semester. Ever since I lost my big desk, started guitar lessons, and cancelled my Facebook (I highly recommend it, but if you don't care to thats cool too) I haven't been spending much of my free time on the computer.  Needless to say I still have been accumulating sonic and culinary goodies to share with you, my digital friends.  Now procrastinating on a Celtic music paper, I feel inspired to make a quick post.
This friday I met with my thesis advisor to talk about my project on the Old Town School and my plan for next semester.  When I got there I heard some really intriguing and entrancing music coming out of his office.  Being a scholar of post Soviet Russian and Eastern European music, Martin was just showing a fellow music major some Bulgarian choral music, and invited me in to listen.   He explained that the classically composed music I was hearing is based off of their traditional musical language but has been gaining larger recognition in the folk and art music world of late.   So I thought it would be nice to share some with you.
The singers that you hear are all trained to sing in the traditional Bulgarian style in a conservatory setting,  as opposed to the classical conservatory one would find in "the west" .  You can tell that their tone is brighter, sharper, and pure.  I am no expert on Bulgarian singing but this sound is most likely achieved maintaining their tongue much more forward in their mouths when they sing and using more of their "head voice" (though I would imagine, sufficient support from the diaphragm is needed to not ruin ones voice, head singing as its called can be quite tough on the vocal chords).  The music is marked  Also what is strange about the music, as mentioned before is the meter, this first song is  in 7/16.  This means that there are 1 + 3/4 quarter notes per measure,  which means in short pretty weird.  See if you can tap it out on your foot, its difficult. I think it should go "One, two, three; one, two, three, four" with the emphasis on both ones.  The second one sounds much more classically western, I don't really like it as much but its still good.