I read Feynman's book and also watched the great PBS documentary about his attempts to visit Tuva. He was a fascinating genius.
An American who DID make it to Tuva was Paul Pena, a blind musician of Cabo Verde heritage that made it big with a couple of hits in the early 70's (Jet Airline was one.) Penha moved to SF and one night discovered Tuvan throat singing on Radio Moscow. Then he taught himself how to do it. When a famous Tuvan came for a concert, he sang for him in the lobby after the show and was invited to Tuva for a contest, in which he won a prize. The story of Paul Pena's trip was covered in a cool documentary, Genghis Blues.
http://www.imdb.com/title/tt0187859/I think you can watch it online for free. I recommend it.
The Cabo Verde Islands are seven major islands and some islets off the coast of Senegal and are now one of Africa's most successful countries: democratic and fairly prosperous by African standards. They were a part of Portugal until the Portuguese deposed Salazar and freed all the old colonies: Angola, Mozambique, Guinea-Bissau and Cabo Verde.
Probably the most famous Cape Verdean is Cesaria Evora, a singer of mourna and other local styles, which is a bit like Portuguese Fado and a bit like some Brazilian styles, like Zeca and Jobim play.
Here is one of her best.
https://www.youtube.com/watch?v=mGYHUHa4jl4I posted this once and it vanished, then I redid it, and it returned.