Iris Dement Lyle Lovett Kasey Chambers Fred Eaglesmith Patty Griffin Mary Gauthier Grayson Capps Union Station Alberta Hunter Emmylou Harris Flatt Lonesome Blackie And The Rodeo Kings Ian Tyson Lee Harvey Osmond Todd Snider The Wailin' Jennys Chuck Prophet Lucinda Williams Patty Larkin Alison Krauss Mark Germino Nickel Creek Jerry Garcia Luke Bulla Flue Daniel Romano Richard & Mimi Farina Gretchen Peters Utah Phillips Bob Weir Connie Francis The Units Dan Tyminski Dixie Dregs Gillian Welch Jim Byrnes James Booker Centro-Matic Rhiannon Giddens Ray Price The Olllam Catie Curtis Eric Von Schmidt Pieta Brown Roger Alan Wade The Far West Emerson Hart Bruce Robison Meg Hutchinson