A new documentary about the history of The Doobie Brothers is set to arrive on DVD and Blu-ray on November 13.  Let the Music Play -- The Story of The Doobie Brothers delves into the long and varied career of the rock group, through its successes, lineup changes, stylistic excursions, breakups and reunions.  Among the film's highlights are interview segments with many of the band's members, both current and former, including Tom Johnston, Patrick Simmons, Michael McDonald, Jeff "Skunk" Baxter, John McFee and Tiran Porter.  Let the Music Play also features conversations with the group's longtime manager, Bruce Cohn, and frequent producer Ted Templeman.  In addition, the video offers in-concert footage of the Doobies performing such classic songs as "Listen to the Music," "Black Water," "Takin' It to the Streets," "Long Train Runnin'" and "China Grove."  The Let the Music Play DVD lists at $14.98, while the Blue-ray is priced at $19.98.  A digital version of the video also will be available for $12.99.