@janneke We used to play the radio while watching the game on TV with the sound turned down. But since they converted the TV broadcasts to digital in 2009, we don't have radio-TV simulcasts anymore. And now people don't use TV much at all. Digital antennas in 2009 introduced a time delay, so the TV game is a few milliseconds behind the radio broadcast of that game.
The explanation is in "Episode #1Time" of Damon Krokowski's Ways of Hearing https://www.radiotopia.fm/showcase/ways-of-hearing
