Originally Posted by DaveyJoeG
The changes to Bane's voice are minimal. He's a bit louder and less mumbly, but that's typical of every Nolan film. Go back and watch the trailer for The Dark Knight. He always uses different takes for the trailers and the final version of the film. I think the fact that they are different takes from Hardy is causing the exaggerations about his voice being completely revamped.
They didn't use other takes, they cleaned up the voice in post-production.