A Tribute to Jack Johnson starts with the throttling backbeat of “Right Off,” but this tribute to the boxer isn’t purely a barnstorming monolith. Just as the long jams of Bitches Brew move between moods, this rocking opus also varies its methods of attack; calm stretches of balladry fade in before the next passage of tumult. Pared down to just two suites, these exploratory sessions resulted in one of Miles' most powerful fusion statements, even when the sound isn’t raging.