Studies: listening to music can improve mood and reduce stress levels. For surgeons, listening to music can reduce fatigue and increase concentration, speed, and accuracy. (Edell, Dean, MD. Eat, Drink & Be Merry. p 128-129. NY: HarperCollins, 1999.)

Studies: higher pitch and fast music in major keys tend to affect mood positively. (Howard, Pierce J., PhD. The Owner’s Manual for the Brain. p 184-185. GA: Bard Press, 1994, 2000.)