Oooh great thread!
I gotta say I don't believe that 21 sec. intro to
Who is it is a voice, but a synth....I too LOVE this song and wish to know what synth brand was used but still looking for that answer, lol. I think Harmon sang with MJ in the "And it doesn't really matter...." verse since the voices seem a little "high".
Now there ARE "mixes" of
Who is it, like this one (below) where the intro sounds very much like a woman vocalizing (and I don't care for it - album intro version is EPIC, lol) but on the album version, it sounds like a synth. I love everything about that song, too and boy is that "intro" haunting.....oh would anyone know what type of drum was used? Sounds like a snare - it's tight and "snap" like.....
YouTube - Michael Jackson-Who is it Remix (Patience Remix)