Kurt Elling and Eliane Elias, both Grammy-nominated vocalists, headline this year's JazzFest Denver at Dazzle this weekend. Elling's warm baritone can stretch over four octaves and he honed his chops by listening to Mark Murphy, Jon Hendricks and other crooners before him. The guy's a mad scatter, as well as being deft in vocalese, where he's set words to songs written by John Coltrane, Pat Metheny and Herbie Hancock, all of which can be found on his 2003 Blue Note release Man in the Air.