Beauty exists just because there is ugliness, how could you define beauty otherwise? Beauty is as abstract as the pretended ugliness. In music, beauty is mostly kitsch, but for the only reason that you consider the noise of a tram on the rails to be “ugly”. Ergo: Beauty can only exist in music, if the listener has a more complex perception capacity, that is, if kitsch and dissonance neutralize one another. Whoever thinks this is too complicated for him shall drop a hammer on his toe and forget the pain in a fit of laughter.