It's about music, the usefulness and elegance of mathematics.. applied mathematics, differential equations. Music and mathematics are related. Also, I know the guy from before when I was active on the open mike night scene in London. youtube.com/watch?v=nyWoowRFca8
Good, ordered and/or spiritual music and mathematics are related (ie. Bach, Palestrina, Gregorian Chant).
Bad music , otherwise known as rhythmic cacophony, not so much (ie. heavy metal, trance, Beethoven).
Really, Beethoven? You think so? I thought he was harmonious and melodic. Classical..