Soul and rock ‘n' roll are major players in My Morning Jacket's vibrant sound. Rick Danko's teardrop-in-his-voice delivery on The Band's “Unfaithful Servant” and the righteous soul of Curtis Mayfield's “Move On Up” both played a part in shaping the band's style. And they've been just as moved by Etta James' exquisitely pained “I'd Rather Go Blind” as by the heavy psych of Zeppelin's “No Quarter.”