if you listen to "the butters theme" and concient a bit u can really make out matt and trey! LOL same in the episodes
sometimes it takes awhile to pick up on DoK's language just kiddin man, i'm a horrible speller myself and yea, you can def. hear matt and trey in all the epiosides, its funny, cause you can just tell they must be making some werid face to make that voice. *thinking of trey in basketball doing cartmen*