As far as I've read, due to low budgets, EVERY Soundie had the music
recorded first and then the filming was lipsynched to the playback - it's
pretty obvious in a lot of them, as the singers often don't manage to match
up their lips to the recorded performance.
One thing I've always wondered is if many or most
> "Soundies" (jazz shorts) were recorded live-sound or "lip-sync'd" to a
> -- Tom Fine