Here's Casey Kasem on the David Letterman show. I think he did a great job:https://www.youtube.com/watch?v=P_qMMZgmLF8
Pretty good-lookin' guy, dontchathink?
Here's Casey Kasem in 1983:https://www.youtube.com/watch?v=rveDyh-3zQ0
He always sounded like a normal person. Maybe that was his gift.
-Joe-