There's a good discussion on the Lacrosse Forums about music in National Lacrosse League games. The NLL is one of the few sports to play music not just in stoppages of play, but throughout the entire game.
"Anyone who's sat close to the floor for summer box lacrosse knows that this sport is better when you can hear it....the slash to the forearm that you can hear all the way in the back rows.....the sound of a car wreck when two or more opposing players chase a loose ball into a corner....The sound of a shot hitting the post.....or smacking off the goalie's pads. These sounds are all better than listening to the same crappy CDs I could listen to at home for nothing."
"The music should be used when a larger arena isn't very full. The sport is great to watch but it will become boring after a while if they don't do something to keep the crowd. When the building is packed and the game is intence, there is abosolutly no reason to be playing music since they crowd should be overpowering it anyway."