av voice changing software

Where can I buy a AV voice changer software?

Also does it have the ability to change the Voice from a grown male to a Young boy’s voice i.e 12yr old voice?

Check this
http://www.amazon.com/gp/search?ie=UTF8&keywords=voice%20changer%20software&tag=p045-20&index=software&linkCode=ur2&camp=1789&creative=9325
Hope this helps
Good luck!

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av voice changing software