Polymath. Genius. Vijay Iyer is no stranger to lofty names being thrown his way. From his first Trio albums, it was clear that his is a unique talent. What is more impressive is how he has grown as a composer and arranger over the past decade. With his sextet, Iyer makes a fascinating leap into ensemble writing that takes advantage of a powerful lineup (cornetist Graham Haynes, drummer Tyshawn Sorey, saxophonists Steve Lehman and Mark Shim and bassist Stephan Crump) veering between tight horn lines, grooves and moments of atmospheric elegance.