Some of my worst OCD's are the hardest to stop, and they're mostly related to Asperger's -
almost like "Rainman", I'm am compelled to name narrator's voices from commercials like Tylenol - Susan Sarandon, FL's Orange Juice - Tom Selleck, Dodge Ram Trucks - Sam Elliot, etc..
Having full relative, and near absolute pitch (1-2 semesters of college level music theory would get me trained to full absolute, aka "perfect pitch", meaning not just finding the notes immediately as with relative pitch, but naming them by ear and and their hertz - I can do/name the notes, but not the exact hertz) voices of people that are known to me, whether actors, singers, celebrities, or family/friends, are so distinctive to the individual, most people would be amazed.
Only the closest of relatives may have voices that you can't distinguish from one another sometimes only when speaking, other times when singing, ie: Roslynd Kind sounds exactly like her half sister Barbra Streisand when singing (hence her problem with album sales, "That was great Roz, but we need to do a retake, because you sounded just like Barbra."), and that's often true with siblings or parents/children.
The same goes for songs/music, I *must* say the composer/artist/group, title, album and year, no matter how hard I try, I can't help myself or stop and say it only in my mind - this drives my family nuts, and causes me no little distress that I can not control it at all.
We watched a movie last week, and I missed the opening credits, but it was a crime story, and the lead detective's voice I recognized instantly, and kept looking at her face to be sure (because aging) I knew it was Sasha Alexander, and kept my mouth shut for most of the film, until towards the end, I finally *had to* yell out, "She's Kate, from NCIS!". I got eyerolls and sign for "quiet", and stayed silent until the film was over.