Music, you might have been told, can come from anywhere — the sky! the trees! the rushing wind! Well, that’s definitely true, but in recent months we’ve been noticing a lot of more deliberate projects dedicated to tapping very unconventional sources for their musical potential. From the universe’s gamma rays to goldfish, from traffic patterns to brain waves, turns out almost anything in our world can create a beautiful symphony, if only we can figure out how best to listen.