Movie critic Roger Ebert hasn’t been able to use his voice since he had larynx surgery in 2006. But the CereProc company has made it possible for him to “speak” with a computer voice designed to sound like Roger Ebert.
According to this article from Popular Science magazine, they used samples from the hours of DVD commentary Ebert did before he lost his voice.
And for a short demonstration of how the thing sounds, check out this video from Oprah.