What I did last 2 games was mute the TV and listen to the broadcast, but what I encountered was the radio was a full 30-35 seconds AHEAD of the television broadcasts so I knew what I was about to see. It was tempting to react on twitter or volnation immediately, but I don't like it when people do that so I just remained silent.
Would you want to get the audio that early? I know you might be thinking "I said in sync", but IF I had to choose between getting the audio early or late, I'd take early. Syncing is possible with a radio broadcast over the internet on a laptop, but not so much with an Iphone.
eta: I can't stand CBS in general because of how they broadcast sports and sometimes only use the radio.