FILE - In this Sept. 23, 2013, file photo, Denver Broncos quarterback Peyton Manning (18) calls an audible at the line of scrimmage in the third quarter of an NFL football game against the Oakland Raiders in Denver. The sound of Manning barking “Omaha! Omaha!” is picked up by a tiny microphone in an offensive lineman’s pads so it can be broadcast to the world. In an age of enormous high-definition televisions and games streamed to tablets and smartphones, audio seems almost quaint. Yet TV executives have made it a major focus in recent years, for the exact reason so many people are fascinated by the Broncos quarterback’s audibles. (AP Photo/Jack Dempsey, File)
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