DMZ/Columbia will on April 8 release the soundtrack to the film "A Mighty Wind," which, as previously reported, stars "This Is Spinal Tap" principals Christopher Guest, Michael McKean, and Harry Shearer as the fictitious 1960s folk trio the Folksmen. The film, which opens April 16 in U.S. theaters, also stars Eugene Levy, Catherine O'Hara, and Parker Posey, who have previously appeared with Guest and McKean in the satires "Waiting for Guffman" and "Best in Show."