Someone mentioned above that a lot of this music is usually playing during pregame and warm-ups, etc. When I went to games back in the '80's the relative quite of the stadium during this time was kind of neat. People would see friends, talk, etc. and as the stadium slowly filled, so did the atmosphere, building in anticipation of the band coming out.
The band, ultimately playing "The Victors" was the absolute crescendo of sound, with the possible exception of a few really big plays by the team during the game.
I assume that now, like at UNC, sound is at a constant fever pitch for much of your time in the stadium. Which actually detracts from the drama and atmosphere.