D ’Angelo and Questlove were sitting on a couch in a swanky hotel watching, or rather, microscoping a video of James Brown performing in 1964. D and Quest observed every gesture, each dance step and light cue, and anytime the Godfather of Soul subtly signaled the band to do something.  This scene transpired 25 years ago. I was in the room  covering D’Angelo for Rolling Stone . He was, at that moment, one of the hottest artists in the world. His sophomore album, Voodoo , had established him as