" The on-field warmup should invoke confidence in the members, don’t have them play something that isn’t ready, or above their level here. Remind them to listen to the environment while playing to understand as much as they can about the overall listening situation. You might try ending the field warmup session with a very loud single note from everyone in order to listen specifically to the reverb and echo of the stadium. "

― Patrick R.F. Blakley , The Field Percussion User Manual