Overtone singing Mark C. van Tongeren

Mark van Tongeren: Five elementary techniques ( 1:09 )
The vowel triad (1:08)
Fundamental drone (0:16 )
Parallel motion (0:14 )
Harmonic drone (0:23)
Contrary motion (0:16 )
excerpt Paraphony (2:39)
excerpt City Chess (2:46)