Look up Tuvan throat singing or overtone singing[1] for general methods of production. You can learn to be able to do it in a few days. [1]https://en.m.wikipe

Look up Tuvan throat singing or overtone singing[1] for general methods of production. You can learn to be able to do it in a few days. [1]https://en.m.wikipedia.org/wiki/Overtone_singing https://en.m.wikipedia.org/wiki/Overtone_singing