Gillian Welch Alison Krauss Lucinda Williams Woody Guthrie The Be Good Tanyas Emmylou Harris Hank Williams Sr. Punch Brothers Steve Earle Jolie Holland Bill Monroe Dave Rawlings Machine Gilian Welch Po Girl Neko Case The Carter Family Willie Watson Justin Townes Earle Doc Watson Eilen Jewell David Rawlings Patty Griffin Jenny Lewis + The Watson Twins Gillian Welch And David Rawlings Hurray For The Riff Raff Ryan Adams John Prine Frazey Ford Brandi Carlile Richard Buckner Shovels And Rope Crooked Still Sarah Jarosz The Averett Brothers The Wailin' Jennys Kasey Chambers Alison Kraus & Union Station Chatham County Line Crosby, Stills And Nash Joe Crookston Iris Dement Gram Parsons Blind Boys Of Alabama Aoife O'Donovan Wilco John Craigie David Rawlings Machine The Honeycutters The Avett Brothers