There is a Cowboys app for smart phones. You can listen to the radio call for free. I usually pause my DVR for about 5 seconds at the start of the game to sync the tv broadcast with the radio. My wife thinks I am crazy, but I plug in only one of the ear pieces so I can listen to both the tv and radio broadcasts.
I love listening to Brad and Babe, and Kristie Scales is the best sideline reporter in the game. She always has the latest injury reports, some of them not so pleasant. Apparently she had a front row seat to Tyron Crawford losing his lunch multiple times into a trash can.