I wouldn't change anything. I think that it's important to let things happen and stay 'happened'. I think that's all part of the learning curve part of fate. I'm just glad that it happened.
I didn't go to film school so my learning was done out in public and showed up on the screen.
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But the mechanics of learning to 'throw your voice' are pretty simple. Anyone with a tongue an upper palate teeth and a normal speaking voice can learn ventriloquism.