Taylor Goldsmith, left, from the band Dawes and Elvis Costello perform as part of the New Basement Tapes. (Lawrence K. Ho / Los Angeles Times)
Jim James (My Morning Jacket) got in on the fun as part of the New Basement Tapes at the Montalban Theatre in Hollywood. (Lawrence K. Ho / Los Angeles Times)
Taylor Goldsmith of Dawes. (Lawrence K. Ho / Los Angeles Times)
Rhiannon Giddens of Carolina Chocolate Drops is a core member of New Basement Tapes. (Lawrence K. Ho / Los Angeles Times)
The Haim sisters, from left, Alana, Danielle and Este, with Taylor Goldsmith (Dawes), provided backup vocals for New Basement Tapes at the Montalban Theatre in Hollywood. (Lawrence K. Ho / Los Angeles Times)
Marcus Mumford of Mumford & Sons performs sets the beat for New Basement Tapes. (Lawrence K. Ho / Los Angeles Times)
New Basement Tapes performs unpublished songs written by Bob Dylan circa 1967 at the Montalban Theatre in Hollywood. (Lawrence K. Ho / Los Angeles Times)
