Yamaha DTXpress/DTXplorer/DTXtreme

Is anyone familiar with, and/or heard a preformance by, Bobby 
Previte? I had the opportunity to see him when he did a one hour solo 
on his electronic setup at the University of Buffalo. Let me tell you 
I was in absolute awe of this guy. He then performed with a student 
ensamble on his acustic kit. Here is a link to his website.

http://www.bobbyprevite.com/


Does anybody know what module he is using and how he gets all the 
recorded human voice effects into it?

Ken