Ironically, this idea came from Duke fans:

If you are sick and tired of listening to Vitale, and you are fortunate enough to have access to an audio receiver + surround sound speakers, here is an easy and 100% effective way to eliminate Vitale and Patrick from your viewing experience. If the game is being broadcast in Dolby Digital 5.1 (not sure if that means the game has to be in high def or not, the audiophiles on the board can correct me), the audio is divided up such that the rear channels are *only* the ambient crowd and stadium noises.