Finite Music

Outside makes its own music.  Creatures, wind and distant activities of the unseen write their own score.  Invisible sheet music fills staff and bar with notes.

This stuff only exists because of air.  No air, no music.  Where the air ends, so do sound waves, as does music.  Most of the universe is, therefore, silent.  

That's depressing.

Here on Earth, though, everything makes noise. Strange sounds fill the air everywhere.  It's music to someone or something.  

The world will end, at some point.  There may never be music anywhere, ever again.  Enjoy it before it's gone.