Why Remix 'Sgt. Pepper's'? Giles Martin, The Man Behind The Project, Explains

From NPR, Bob Boilen talks with Giles Martin about the new 50th anniversary mix of The Beatles' Sgt Peppers album. A great podcast, and some very revealing a-b-c comparisons between the original mono mix, original stereo mix and the new stereo mix. Nowhere mentioned however is the 5.1 mix, which I personally am eagerly awaiting!