"Neil Young: Heart of Gold" is a love letter to the consistency and familiarity of Neil Young's voice, a floating silver reed with all the colors of moonlight in it. The songs are from Young's albums "Prairie Wind" (2005), "Harvest Moon" (1992), and "Harvest" (1972). For the premiere of "Prairie Wind" Young gathered long-time band mates and old friends like Emmylou Harris for a performance that has the feel of a casual reunion picnic. Held at Nashville's Ryman Auditorium--the original home of the Grand Ole Opry, and a room with what may be the finest acoustics in the universe--the whole ensemble nattily attired in neatly tailored traditional western get-ups, it is as if the ghosts of the Ryman are singing through them. Young's songs speak to ensuring continuity between the past and the present, while cutting a path into the future, and he and his fellow performers open themselves so wholly to their surroundings that they become a part of it.