Dave's Picks Volume 9 features a 1974 Grateful Dead concert played in Montana. Courtesy of the artist hide caption

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Dave Van Ronk at the 1968 Philadelphia Folk Festival. Diana Davies/Courtesy of Smithsonian Folkways hide caption

itoggle caption Diana Davies/Courtesy of Smithsonian Folkways

The members of Caravan Palace are practitioners of electro-swing. Courtesy of the artist hide caption

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Sylvester's 1978 album Step II resulted in a couple of smash singles, "Dance (Disco Heat)" and "You Make Me Feel (Mighty Real)." Fantasy Archives hide caption

itoggle caption Fantasy Archives

Tartit performs at the Festival au Desert. Chris Nolan/Courtesy of the artist hide caption

itoggle caption Chris Nolan/Courtesy of the artist

Yo La Tengo's new album is titled Fade. Carlie Armstron/Courtesy of the artist hide caption

itoggle caption Carlie Armstron/Courtesy of the artist

Music by guitarist Fields Ward appears in the new collection Work Hard, Play Hard, Pray Hard: Hard Time, Good Time & End Time Music, 1923-1936. Library of Congress Prints and Photographs Division hide caption

itoggle caption Library of Congress Prints and Photographs Division

Samuel Yirga plays Ethiopian standards with a voracious talent that helps him savor each musical flavor. Courtesy of the artist hide caption

itoggle caption Courtesy of the artist