Re: Batman v Superman: Dawn of Justice
If the Begins Batman game is anything to go by, I don't think Bale's Bat voice was his fault.
In the audition and game recordings, his voice sounds great. He basically took his Bruce Wayne voice and dropped the octaves a bit to be a little more stern and whispery. Pretty much like Keaton Batman where it's the "I'm cool and collected, ***** you ain't got nothing on me" voice, which Conroy excels at. It's not that toothy, insincere Bruce voice, but it isn't the outrageous, unhinged "dooooo triggerz pahhhdzzz" voice either. It's that more nuanced, darker place deep in your chest, not spitting out all your words like a bat-**** crazy Daffy Duck.
Nolan was probably the reason the voice was so horrible, either telling Bale to go further or going to town in post production. Clearly the voice in the audition, in the game, and in most of Begins is the natural performance of what Bale had in mind for the character.