Studies have shown that music has a profound effect on human body and psyche. In fact, there’s a growing field of health care known as music therapy, which uses music to heal.why music is so effective, both in health or sick people?
As other forms of Art, Music affects our emotional side. And whenever we play with emotions, the human brain recognizes this as appealing.
Pictorial forms of Human Art may have preceded Agriculture, as revealed by primitive human caves. I don't know if music or singing was present at that early Age.(I expect so, but there are no documental traces of this...)