This amiable documentary surveys small towns in Mississippi and Louisiana where aging blues musicians live and practice their art. The music is performed with gusto and the reminiscences are engaging; among the more charming performers are Barbara Lynn, Lazy Lester, Jimmy “Duck” Holmes, and Bobby Rush (who speaks in his car as he’s driving to gigs). Many of them express concern over the lack of younger people playing traditional blues, and some even wonder if the genre will die when they do. Regardless, the performances all convey a vital sense of joy, making one appreciate that so much of this music has been documented for posterity. Daniel Cross directed.