Shoot, I'm surprised.
I ended up with this: "You have a Midland accent" is just another way of saying "you don't have an accent." You probably are from the Midland (Pennsylvania, southern Ohio, southern Indiana, southern Illinois, and Missouri) but then for all we know you could be from Florida or Charleston or one of those big southern cities like Atlanta or Dallas. You have a good voice for TV and radio.
I'll give them the Pennsylvania bit but I'm right over the line in Maryland. It has recently been brought to my attention that I say things strangely. Apparently I have some Baltimore, Delaware and Pennsylvania "accents" in my speech. I also make up words, such as "eem" or maybe it's spelled "eme". As in, "I told eem" instead of him. I also say "that" in a strange way that my brother says makes me "sound like an extra from Fargo". I think it sounds like I'm saying "thee-at". Then of course there's the old people talk that you get from being around your grandparents all the time and if my husband says "you're gonna do what" when I say I'm gonna run the sweeper anymore, "I'm liable to hurt eem".