Sweet Harmony

Watching Bon Iver do an A cappella version of For Emma (forever) on the brilliant La Blogotheque site recently, got me thinking about the human voice and that the most elevating and transcendent sounds in the world happen when a group of humans wail in various forms of harmony.
I searched Youtube and found a few life affirming examples.









OK, this one below isn't 100% a cappella but I had to put it on just for the guy who is leading them...the spirit has truly taken him.