We, apparently there are rules per conference. Per the article:
The Mountain West Conference has specific rules regarding when bands can play during the game.
“Bands are prohibited from playing during game action or at any time that is disruptive to the competitors. Pregame, postgame, timeouts, halftime, between quarters, or other breaks in the action are permissible times for band activities,” the rules state. “In the sport of football, bands must discontinue playing when the team with the ball breaks the huddle until the completion of the play. If a team plays a no‐huddle offense, the band shall not play at any time during the offensive possession.”
I wonder if the MAC has similar rules?