“Danny Brown is at his best when he’s coming apart at the seams. Sometimes that means peering into his personal hell. On 2013’s superb Old, a B-side suite of frenzied party songs (tailored to have him booked at huge festivals) were qualified by a front half that dropped the Detroit native in the middle of trashed hotel rooms, dodging calls from his daughter, awake for days on end. Earlier, on his n”