Music is good for the soul because of its deep connections with the brain, is intrinsically meaningful to humanity as a race. We thrive off it. It drives our actions and emotions, and its influence on our brains creates a sense of unit.
Music is a language of emotion in that it can represent different feelings and barge into the soul with no boundaries or limitations. Music soothes the soul during one of the most deeply soulful and spiritual points in life.