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Full user review
"Got MorphVox on my laptop and exVox on my phone..."
ScreamingBee offers some of the best support and painless installs Ive seen, and they have a library of add-ons (some free). Its easy to tell they actually use their software. It is compatible with the exVox Voice Change Controller i use.
Although in no way is this software a bum deal, the price is a little above some of the competitors (Blaze audio Voice cloak, Scramby, for example).
If you've got time and no money, check out vocalster free voice change software or Funny voice. The free software is simple and creative and may be all that you need.