Sting’s latest attempt to prove he is more than just a rock star is also his most eccentric. Songs From the Labyrinth finds the ex-Police man faithfully tackling the 400-year-old oeuvre of John Dowland, songwriter and official lute player to the court of Britain’s James I. The often hymnlike songs are tolerable enough, thanks largely to the exquisitely skilled contributions of lutenist Edin Karamazov. But when Sting simply reads excerpts of a Dowland-penned letter, the shadow of Spinal Tap looms over the proceedings.