THE AMERICAN ROOTS MUSIC & ARTS FESTIVAL ANNOUNCES TROMBONE SHORTY & ORLEANS AVENUE AS LATEST ADDITION TO EXTRAORDINARY LINE-UP NORTH CAROLINA'S ERIC CHURCH TO HEADLINE BOTH NIGHTS WITH TWO HUGELY ANTICIPATED HOMECOMING SETS ON OCTOBER 17 AND 18 AT RALEIGH, NC'S WALNUT CREEK AMPHITHEATRE Incredible Line-Up Features Modest