Rock music producer and talent manager Andrew Slater makes his directorial debut with this hybrid concert film-documentary that revisits the mid-1960s, when LA’s Laurel Canyon became the birth canal for the California Sound. Former Wallflowers front man Jakob Dylan acts as tour guide and interviewer and makes an agreeable if low-key host; in between chatting up such former canyon habitues as Jackson Browne, Eric Clapton, David Crosby, Roger McGuinn, Graham Nash, Michelle Phillips, John Sebastian, Ringo Starr, Stephen Stills, Brian Wilson, and, in his final interview, the late Tom Petty, Dylan performs covers of several of their classics, backed by Fiona Apple, Cat Power, and Beck, among others. Since most of these numbers are merely snippets, the history of the era’s cross-pollination is more compelling: how the Byrds took folk music electric, and how Buffalo Springfield followed suit; how the Beach Boys’ Pet Sounds influenced the Beatles’ Sgt. Pepper’s Lonely Hearts Club Band; which musicians left what band for another, and why; and the rise of the 12-string guitar. Several of the talking heads and reminiscences were part of Jon Brewer’s nostalgic documentary Legends of the Canyon: The Origins of West Coast Rock (2010), but Slater’s film is slicker, better photographed, and more revealing.