What we hear with our ears are sound vibrations. Other parts of our body perceive sound vibrations, as well. Think about how our bodies respond to a sonic boom. It causes a response in all parts of our physical body in that we physically move upon perceiving a sonic boom. Another example is to put your hand in front of a speaker and by adjusting the volume up and down, feel the waves of energy change against your hand.
Musical notes produce their own specific sound vibrations of energy.
Waves of sound energy travel from the source and resonate in our ears, and in specific areas of our body. When we feel uplifted by music we are feeling the energy waves the energy vibrations in our upper torso and arms. Increased energy in our upper torso and arms come up in our mental thoughts as kindness toward ourselves and with others. This is a biological effect. It has also been shown that increased physical energy stimulates the flow of endorphins in our body, which, in turn, increase our mental thoughts of well being, as well as blocking physical pain perception.