I've found loud music to be a common complaint I get. fist off it depends on the acoustics of the rink, and the quality of the sound system. so most standard rinks blasting music, sounds awful and does hurt the ears. Minot has just recently built a new rink with a great sound system so it has gotten better, however I've noticed that going louder at warm-ups is fine as people are still getting settled. I do however use a trick for volume during the game, I generally keep the music lower in the 1st period, then increase it a bit in the 2nd, and if its a close game I will increase it more in the 3rd. by the time the 3rd period comes around you have basically got peoples ears to adapt and they don't notice the volume icrease, and if its an intense game they actually cheer louder with the music I play and it creates atmosphere.
as far as live band vs. recorded music. I have been a season ticket holder at UND since 2001 (thanks pops) I've noticed the atmosphere in the ralph slowly start to resemble a funeral at times, and it has everything to do with the lack of recorded popular music, they play waaaayyyy to many adds (gotta pay bills I guess) and do too many special things (looking at you simba cam) that basically take away from the atmosphere IMO (I know this may be an unpopular opinion) I like the live band at the games, I think a little less of them, a little less of the extras, and a little more pump up music is the right recipe