Brooklyn native Yasiin Bey has largely retreated from fame to a state of semi-retirement. But back in 2009, when he was still known to the world as Mos Def, he released one of the last decade’s essential indie-rap albums, The Ecstatic, with beats indebted to psych rock, Eurodance, and samba. His only release since then, a joint effort with producer Ferrari Sheppard from last December, turned out to be virtually D.O.A. Fortunately, Sunday’s show promises a front-to-back performance of the 43-year-old Bey’s classic album from 1999, Black on Both Sides. The LP stands as a defining document of Rawkus Records’ indie-rap movement in the late ’90s—confident and purposeful in its Afrocentrism, complemented by a fluid songcraft that eludes so many of the conscious rappers it influenced.