Think about this the next time you're mad that your parents told you to turn the volume down. It could be much, much worse.
Eventually the son ran away from home and joined a string quartet, where he found fulfillment by playing Dvorak. His father disapproved of his son at first, but then he saw his son perform and realized the true joy of self-expression his son found in the cello, and gave him his blessing in a tearful father-son reunion.
An alcoholic father routinely dumped angry messages in his son's voicemail, until his son took his words and set them over some beats and piano lines. The resulting track is incredibly dark, but a fascinating way of dealing with your problems.
Song is loaded with language that might be too strong and imagery that might be too graphic for some.
Although if my kid was sitting in an office chair in the middle of the room singing sporadically to himself without any music playing (I don't see any headphones!) I'd probably contact the neighborhood exorcist STAT.