The music at competitions plays a role in how the audience and the judges react to a performance, and it also affects how a skater performs. If it's played too loud or too soft this might give a skater a disadvantage. The skaters must have some control over the loudness by editing the music file that they will skate to, but the final control is on the arena's speaker system. Is the volume set at the same level for all the skaters during a competition? Or do the skaters get to choose exactly the volume setting at which their music will be played?