Think tribute acts - this was actually an aborted one. We were ready to go and the 'Karen' suddenly announced she was pregnant and was dropping out. She sounded quite similar in tone, but of course not the sound of the real Karen Carpenter. As we had shows booked, I found a replacement who doesn't sound like Karen, but for the tributes the music is so well known, absolute authenticity is not actually needed. Not sure if the US has the same demand for tributes, but it's very strong business here. Over the next six months we have Tina Turner, Michael Jackson, Beatles, Whitney, abba and Queen shows all touring into my venue.
There are a few available books that purport to be the carpenter's arrangements, but they're full of errors. The system we do is to break the songs down into two bar sections and then with a keyboard, loop the two bars and listen for what is on the original release, until you identify every note that is sounding, who's voice it is, and where in the soundfield it is. We discovered very early on that they recorded the same things twice, and panned them left and right - sort of 'opened up' double tracking. Sometimes, she would even change how she pronounced words, or put emphasis on different syllables. Sometimes in the two bars, one of us would suddenly bash the keys and say - there's a F sharp in there, and sure enough, there it would be - then you had to work out where it came from. Sometimes, Richard would sing Karen's line for added texture and she would sing very low too, doing the same thing for him. The cleverness of it all really came through after listening this intently.
For simplicity, the dozens of tracks would be sent out as stems - so usually two stereo BVs - male and female, coming up on two channels. We had all the band recorded, and could shrink or grow the band depending on funding. Typically, keys, bass, guitar and drums - with the rest on the track, but sometimes the sax would be a real player doubling flute. If we lost say, the bass player, instead of a dep, we'd unmute the bass track. We did a couple of shows, and it fell apart - the singer wanted to do other things and the keys player died! He was the same guy in our Beach Boy tribute, so that was two shows that simply stopped.
There's a clearer breakdown of the parts in this video
here