How do you make your voice all squeaky like alvin and the chipmunks [just for an example] in a youtube movie?

Question by peytonneely@rocketmail.com: How do you make your voice all squeaky like alvin and the chipmunks [just for an example] in a youtube movie?
I have windows movie maker and thats all, so like is there any freeware i can download that will help me do this?

thankks:)
Peyton

Best answer:

Answer by derek180
inhale helium

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