The Band Playing

[D.Hosler]

Friday night in a boys varsity game, we had a tie game with about 2:00 left in the fourth quarter when the visiting teams coach
approached me during a timeout asking if the band was allowed to keep playing the drums making more noise while his team was shooting free throws.(his team had just missed 4 or 5 in a row) I told him they could play as much as they wanted. Was i correct in my answer. I cant seem to find it anywhere in the rule book. Your help would be appreciated.