I have an Apple TV (3rd Gen A1427), connected to my Airport Extreme (6th Gen).
I often stream music from iTunes on my retina MacBook Pro. The Apple TV, Airport and MBP are all connected on the same WiFi in an open plan lounge, dining, kitchen room. The TV, Apple TV and Laptop are at one side of the room, the Airport on the other, the only physical object between the Apple TV and Airport is a couch. The room would probably be less than 20m wide.
What I'm finding, if I walk or stand between the line of sight between Apple TV and Airport, the stream drops out.
Has anyone had this same experience with a similar set up?