I also can vividly "hear" music, not really voices, but I can put a track on in my head almost as if listening to the radio. For people that can't do this, it might sound great - and it is quite cool except for waking up many mornings with a random track stuck in your head or hearing a particular riff over and over again.
I don't tend to remember faces of people I've recently met - there are times when someone says hi, starts chatting and I think "who the hell is that?"