Rev. Gary Davis Rob Whitfield Martin Sexton Madeleine Peyroux Sophie Milman Mary Lou Lord Oren Lavie Jake Pearson Rumer Leon Redbone Clay Stuckey Brewjam Ron Sexsmith Jeff Klein Art Bentley Paul Geremia Roy Book Binder Michael Lee Firkins Glenn Kaiser Blind Willie Johnson Blind Blake Heptones Mama Cass Melanie Laurent Papa Lightfoot Jeff Kollman Ronnie Earl And The Broadcasters Bo Carter Maria Muldaur Emily Remler Bebop Deluxe The Broken Circle Breakdown Bluegrass Band Tim Hardin Carpenter Ryan Montbleau Band Hard Working Americans Joan Armatrading Pickin' On Series John Adorney Ren Harvieu Justin Hayward David Foster Savage Affair Fastball Bonnie Raitt Cannonball Adderley Crosby, Stills, Nash & Young Ray Charles Van Morrison