You don't need any software. Just go to any of the majestic ape videos that were recorded at ccp, listen carefully and you can hear Amanda Kleinmanns voice in the background all the time since the person who record her always stands close to her, so he records not only the processed voice that comes from the speakers, but also her natural voice as it come straight out of her mouth.

Alefantis isn't Majestic Ape, it's Amanda Kleinmann.

To answer your question, I don't know if it's possible to reverse the sound effect to hear the natural voice without sound effect.

What I've noticed about alefantis is he talks with a gay kinda lisp...I'm sure he could pull off a tranny voice then add the demonic effect...

I'm new