When “Crunk Ain’t Dead” first dropped, the Southern rap paean offered a glimpse into what drives Duke Deuce. With Memphis Massacre 2, a fuller picture emerges of the Tennessee rapper and his place in regional hip-hop history. Even apart from a star-studded remix of his breakout track, imbued with features by Juicy J, Lil Jon, and Project Pat, the son of veteran Memphis producer Duke Nitty draws a straight line between the city’s past and its prolific present. In-your-face cuts like “Duke Flow” and “Feel Like It” find balance in sleeker fare including “Lock Doors” and the syrup-slow “Fat Mac.”