Over the years Quatuor Bozzini have developed a sterling reputation for their ability to bring astonishing rigour and precision to the thorniest, most exploratory work — whether dazzling quartets of Wandelweiser mainstay Jürg Frey or the psychoacoustic experiments of Alvin Lucier, with many stops in between — and the multifaceted sound world they produce here is as glorious and rich as anything in the group’s vast repertoire.