The Beatles' White Album turned 40 last week. And that put the classic album back in the spotlight, leading critics to revisit the band's most experimental and controversial work. Was it their masterpiece or biggest mess? (Feel free to post your thoughts in the comments below.) For one look back, you can listen to this podcast from WNYC's Sound Check (iTunes - Feed - MP3). And, for good measure, we're throwing in some video clips from the album's studio sessions.