Sound-alike casting - I've seen a lot of it recently and in my opinion, there are two types of sounds-alikes... 1) Dead on match. They don't want you to add your personality or to see what you would do with the role. Your task is solely to match the vocal quality, cadence, and personality that already exists. This may come into play if the person playing the role is unable to come in for pick ups for whatever reason. Basically your voice will be mixed in with the other voice