Grammy Winner for “Long Form Music Video,” Big Easy Express tells the story of Mumford & Sons, Edward Sharpe & the Magnetic Zeros, and Old Crow Medicine Show on a cross-country train ride from California to New Orleans. Nuthin’ but a Jim Thang’s salute to these artists this week will include music from their albums Babel, Sigh No More, Up From Below, and O.C.M.S. Most likely by the end of the show you will have a strong desire to play the mandolin.