Watching the Bears' game tonight, I noticed an annoying "click" of sorts during times when it seemed like control was being switched between Soldier Field and either Master Control for the network or locally here at 12. The HD video feed would go from full screen to having the side bars with the Ch. 12 info on it. It would be accompanied by an audible noise, kind of like when you pull a guitar cord out of an amp with the level up. Anyone know what that is all about?