I was lucky enough to see Huun Huur Tu, an ensemble of Tuvan throat singers and musicians, perform live at the Old Town School of Music in Chicago this past year. Believe me when I tell you that YouTube doesn't quite capture the experience. Not all the overtones that can be produced from the human throat can be encoded in .flv. It's music that has to be experienced live in order for your ears to physically pick up on all the tones being sung. But recordings do give a decent enough approximation of how throat singers can produce multiple tones at once. It's pretty amazing stuff. Check out Huun Huur Tu's 2006 performance at the Philadelphia Folk Festival below.