How To Throat-Sing
STEP 1: The shape of the mouth
Relax the muscles of your jaw and lips. Keep your mouth open
with about one centimeter between your upper and lower teeth.
(Dan Bennett adds:
you may need to stiffen the muscles in your lips and tongue later on
when you're working on the quality and pitch of the resonance.)
Special thanks to Dan.
He translated all of these instructions.
Saga J Haruhiko