It's where we're all headed, of course, but not all composers make you aware of the fact. I'm talking not just about our inevitable demises, and the end of things as we know them, but something even bigger: the heat-death of the universe. That's how Thomas Adès describes the essential quality that he hears in György Ligeti's music, in every piece the Hungarian composer wrote, from his earliest works before he fled to the west under cover of sackcloth in a train during the Hungarian Uprising of 1956, to the very last music he wrote in the years before his death in Vienna in 2006.