MAVIS STAPLES An R&B legend finds a new sound, with help from Wilco’s Jeff Tweedy Mavis Staples’ new album, You Are Not Alone, finds the 71-year-old soul icon in peak form. It was produced by Wilco frontman Jeff Tweedy and recorded at the Wilco Loft, the group’s rehearsal and recording space in Chicago. On the album, Staples takes on songs written by her late father, Roebuck “Pops” Staples—who founded their legendary family band,...