Researchers at Brigham Young University found evidence that infants as young as five months are able to discern when a happy song is playing, and by nine months they've added comprehension of sad music to their repertoire. (http://io9.com/5837976/what-happens-to-your-brain-under-the-influence-of-music).
About 50 percent of people get chills when listening to music. Research shows that’s because music stimulates an ancient reward pathway in the brain, encouraging dopamine to flood the striatum—a part of the forebrain activated by addiction, reward, and motivation. Music, it seems, may affect our brains the same way that sex, gambling, and potato chips do. (http://mentalfloss.com/article/51745/why-does-music-give-us-chills).
So how does music affect you? Does playing musical instruments trigger something inside of you?