Got it after a bad car accident, some brain damage. Interestingly it also made me race blind as well - I'm probably one of the few people in the world who can say that! I do identify loved ones from the sound of their voice, though, or if not speaking, I can sometimes tell from how they walk and move. Same thing races, it's not hard to tell if someone's voice sounds black or if they walk like a white guy
Maybe many of us are just subconsciously blocking those types of things out now because it’s so pervasive.