Making sound effects

After few playings with animation of Daxter and Robot. I found a problem that they are talking with human voices, which isnt good. Thanks to Sony Vegas, i easily managed to play with it, and iv made a squirrel voice and a robot voice. Really loved it, now the animation is starting to be a little bit realistic.

Shame i cant place an example of it, but i will add a folder and place 2 different sound files.
1st will be original
2nd will be changed