I recently downloaded the descrambler and can't get it to descrambler is their a certain freq I'm suppose to set it on? I'm using an rtl dongle and sdr sharp
Yeah, voice inversion is used on some radios, but it's not very popular as it isn't really secure. It's pretty easy to chose from one of the many offset frequencies and hear exactly what is being said. I'm willing to bet what you have is a program that only handles voice inversion scrambling.
Encryption is an entirely different beast, and you are not going to find a software that will handle encryption, at least not legally.