Few icons are as globally memorialized as Elvis Presley, but for “Elvis" filmmaker Baz Luhrmann, the biopic felt like "a blank sheet to explore” American history, commercialization and the true origin of rock 'n' roll: Black music. In this episode of “The Envelope,” Luhrmann shares his unique take on Presley’s tragic story, how Austin Butler was able to “meld his soul with Elvis' soul” and how a pair of socks connected a young Baz to the King. To read a full transcript of this interview, please visit the episode page at latimes.com.