I finally figured out

what this:



reminds me of.

It's this:



Laugh if you want, but they're both ancient folk songs (albeit from completely different continents) that are turned inside out and backwards and 'Popped up' for modern consumption.

To great effect both times, I might add.

Obviously, I've been drinking...

As an aside: For about 25 years, I assumed that the female tenor part was actually a stringed instrument of some sort. I still don't really believe that a human voice can do that.