I'm currently creating some very specific notated exercises for combining yodeling with overtones (SATB), using 2 completely different approaches.
The best I've heard in this area is Christian Zehnder, who has cleverly woven his national Swiss tradition into it. I'd like to open some discussion about this topic- any experience with overtone yodeling or fresh new ideas?
Anyway, in a yodel surfing expedition, found this completely amazing blog site 'Yodel Heaven', which has a huge amount of rare (downloadable!) mp3s from all over the world, including a bunch of overtone and throat singing tracks. (Hint) You'll find Arthur Miles there too! http://mademoisellemontana.wordpress.com/