Oakley Anderson-Moore at nofilmschool has published an in-depth article on ADR (dubbing) here: Inside the World of Professional ADR with Julie Altus of Todd-AO.
You’ll learn such cool things as whether the “A” in ADR stands for audio or not, how to prepare for an ADR session, gear and advice on getting into the business. Here’s a snippet:
ADR is a great time to make changes and improvements, but also can be very time-consuming and difficult for many actors. You are basically trying to get them to recreate exactly the feelings and voice match and emotions of the scene that is being recorded.