From classical concerts to commercial jingles, music fills our lives every day. But philosophers disagree about what exactly music is and why it’s valuable. Among the world’s diverse musical cultures and styles, are there any universals? If you play Bach’s cello suites on a synthesizer, is it still the same piece of music? And why do people deliberately listen to sad songs? John and Ray sing it with Andrew Kania from Trinity University, author of Philosophy of Western Music: A Contemporary Introduction.