Filmmaker Ken Burns has tackled many subjects over the years, from the Civil War to baseball. His documentaries have garnered numerous awards over the years. In 2001, he took an in-depth look at the genre of jazz. Now, he is aiming to explore a different genre with Country Music, an eight-part, 16-1/2-hour documentary premiering September 15 on PBS. And as with Jazz, there will be an accompanying soundtrack. The most expansive of these is a 5-disc box set debuting on August 30 from Legacy