The soul musician behind one of the year's best albums, the heartwrenching Jimmy Lee, spoke with NPR music critic Rodney Carmichael as part of NPR's Tiny Desk Fest, a special four-night series of Tiny Desk concerts at NPR's headquarters in Washington, D.C. Saadiq shared stories about his brothers' battle with addiction, the origins of D'Angelo's "Untitled (How Does It Feel)," and what it's like to play two Tiny Desk concerts 10 years apart.