you mean the Scottish accent ? in the past, that was Stuart. I understood it, but well others didn't. much as I'm sure there are other accents I don't get.
current ones..
karl , well you can hear his voice before buying it.. He's from the UK.. he does the SWA one , you can hear a demo of 1 bit of it
http://www.youtube.com/watch?v=zATQx4eRKBw although Karl does have a slight accent (maybe I notice it being a londoner :) ) it's not really broad or pronounced
Eli.. he sounds a bit like woody Allen. he does the groove 3 one .. again probably a demo of his voice on their site
http://www.groove3.com/str/sonar-x2-explained.html click the green play icons
I have a year pass for groove3, as I use a lot of what they do videos for :)