Official
When underground music makes it out into the light of the sun (the public), it finally becomes official. Music isn't really real unless people hear it outside of those secret underground concerts.
Think of all that music you listened to underground but not in the light of the sun. None of that was official music. None of it!
そう, ぞう
つかさ, ともがら, へや
None
Once the music is official, you'll feel it in your soul (そう). When you listen to it outside, under the bright sun, your soul gets to finally hear it too.
The official music penetrates into your soul, instead of just your ears, and it's affecting everyone else's souls too! Oh no... wait that's too many people. This was your song! No, it's too popular now, stop your souls from liking it! Ahhh!