Huun-Huur-Tu
Throat Singers of Tuva
Huun-Huur-Tu (Tuvan: xün xürtü) literally
means "sun propeller." The vertical separation of light
rays that often occurs just after sunrise or just before sunset. For
the members of Huun-Huur-Tu, the refraction of light that produces
these rays seems analogous to the "refraction" of sound
that produces articulated harmonics in Tuvan throat-singing.
More info is available at huun-huur-tu.com