To support a study of the effects of live preferential music on emergency department operations. The randomized, controlled study will use a group of professional musicians to serve in an emergency and level-one trauma care setting. Researchers will examine whether patients who are guided by the musicians to select live music options show higher levels of satisfaction, less reliance on pain medications, reduced hospital stays, and lower overall costs of care when compared with patients who do not have the opportunity to select live music options. Staff who are exposed to the music also will be assessed for perceptions of personal work performance and satisfaction in the workplace.