Altogether, they found that playing music was associated with lower anxiety and pain ratings, regardless of the type of surgery performed, the age or gender of the patient, and when the music was actually played. Compared to controls, there was an average 21-point decrease in anxiety on a 1 to 100 scale, and a 10-point decrease in pain. The drops were even more profound when patients’ baseline pain and anxiety ratings were compared to their ratings after listening to some sick beats.