If the turn-of-the-century waif who narrates Terrence Malick’s Days of Heaven were to make an album, the result might sound like The Foundling Alone — the voice-and-guitar tracks that served as a blueprint for Mary Gauthier’s 2010 album The Foundling, available on her website. That acclaimed concept album, cut with the Cowboy Junkies’ Michael Timmons producing, concerned the singer’s discovery that she’d been left at an orphanage in 1962 and her painful attempts to contact her birth mother; songs about abandonment sound even more starkly dramatic with no adornment. But Gauthier (pronounced “go-shay”) hollers where others would wallow, especially on “The Orphan King,” where she makes “I believe in love” sound like a cry at the barricades. She performs a free concert tonight for a TV taping of Jammin’ at Hippie Jack’s.