Magix is actually a very underrated program.
Blows dust off copy... I have 11, and think this all works in 10. Don't know about 12.
In the audio effects, rack you can use the Time Processor to adjust pitch and tempo a bit. There is a vocoder if you want that kind of effect. The elastic audio editor can be fun. Apparenlty it also accepts DirectX plug-ins so you might be able to find a free on on the web that mods voices.
There is no substitute for a different voice if you can find a volunteer though.
Thanks for reminding me how fun this program is.
~insert whitty comment here~
