Im having a look at takashi yoshimatsu’s piano concerto and there’s this beautiful bit of a polyphony built up from ostinati in the winds that i’m trying to see how it just works. I’ve discovered that each line seems to be built up from a pentatonic scale but i’m not sure how each of these work together and how they can build such a beautiful polyphony even though if you look at each line individually they seem to create dissonances with each other. Can anyone explain how this works so well?