I have the task of setting up a beat (bass and drums) to already existing vocal-only tracks. (Male vocal, three-part harmony.) I've tried playing along, and while I like the feel of what I'm getting, I can't quite hit the sweet spot in terms of syncing to a rock-solid rhythm.
I'm fairly certain the song was recorded to a click track, but I don't have that audio data. Has anyone done this sort of thing successfully? How did you do it?
(This question straddles performance and audio, and is in part a test question. The situation is real, though.)