Pink Floyd was one of the few bands out there (in the rock arena) that actually cared about sound quality in their live performances.
I saw them at Jack Murphy Stadium and two things happened.
1. 95% of the audience didn't realize the concert started about 45 minutes before the musicians actually hit the stage as the very slowly brought up ambient sound throughout the arena till suddenly they were on stage, very cool.
2. For a football arena it sounded damn good, loud clean, no need for ear plugs, no fatigue after the show.