One of the things that is often asked about the Kronos Quartet is how do they keep reinventing themselves? In 40 or so years, they’ve recorded the works of contemporary minimalists Philip Glass and Terry Riley, early 20th century Austrian Alban Berg and Argentinian revolutionary Astor Piazzolla. They’ve collaborated with The National’s Bryce Dessner and performance artist Laurie Anderson, the great saxophonist Ornette Coleman and Iceland’s Sigur Ros, and performed pieces by c