Punch Brothers predictably good as usual, rest of 'em so-so. Basically The Folk Revival Part Four: a live concert and rehearsal footage featuring various musicians from the Llewyn Davis soundtrack, and a few stunt castings like Joan Baez and Patti Smith. Chris Thile, the mandolin wiz, is always worth hearing - in moderation, but the problem with the music is exemplified by Marcus Mumford, who has the wardrobe of a 1950's hobo but has a sleek double chin and the phoney voice of someone who has grown up listening to phoney singers and doesn't know any better. He whines and squeaks like Woody Guthrie's peevish kid brother but he's English; if he could sing with genuine emotion it wouldn't matter, but he can't. Most actors don't sing well, and most singers don't act well. Marcus Mumford does neither well.

Chris Thile attempts Luke Kelly, fails, and turns 'The Auld Triangle', a bitter, sleazy truculent prison song into a cheeky little joke number.

A high standard of musicianship among these sixty-years-later folk revivalists, but also a high degree of nauseating 21st-century pop 'kerching!' sensibility. Not a lot of soul in evidence.