I think you can only do it on the computer, which I dislike. I can not do the overlay on the apple tv or iphone. You have to have the MLBtv Premium not standard, which is only $25 more. Maybe next year.....? Thanks. If this is a stupid question just ignore it, but where do I find the 'audio overlay' option in the mlb.tv interface? I've got the premium subscription, but I've never been able to find it.