You want to increase the pitch, while maintaining the tempo. It's pretty easy if you get Audacity, which is a free audio editing software. You'll need a plug-in for it to export as MP3.
Anyway, you just import the sound file, select it all, and use the change pitch function, then experiment with it to get a good chipmunk sound. It's really fun. I made "Barbie Girl" sound like it's being sung by a guy.
· 9 years ago