http://www.youtube.com/watch?v=xgQBpQYOLAU&feature=youtube_gdata_player
Circular breath?
That is the same thing I was thinking. I didn’t see him take a breath and he has the chest movements I associate with circular breathing but far less obvious than I usually see. He does make it look effortless. I have tried to do it before but it really wore me out!
Here is a biography: