Sarah Jarosz at Kessler Theater
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Teen prodigies are common in music, but Sarah Jarosz, 26, has outlived that label and then some. Signed to Sugar Hill Records when she was a teen-aged mandolin wiz from Wimberley, Tex., Jarosz has grown steadily as a singer and songwriter ever since. Undercurrent, her fourth and latest album, won two Grammys — for best folk album and best American roots performance, the latter for “House of Mercy,” a ghostly blues tune about a spurned beau who refuses to go away. In concert, she switches between mandolin, guitar and banjo and ties it all together with her dusky soprano. She also likes to mix her own tunes with curveball covers: She’s been known to sing everything from Bob Dylan’s “Ring Them Bells” to Radiohead’s “The Tourist.” Opening the show is the Brother Brothers, a Brooklyn string duo made up of twins Adam and David Moss.