Crane, Matthew wrote:
Yes, I understand that, that is why I'm thinking of this approach. My
idea was to use analog voice transforms and their inverse with
properties that would preserve most of the codec performance. But it
would be awfully difficult to sync up the inverse on the other end
without a data connection, I expect that with voice calls that delay can
be added and removed without warning.
There are no simple voice transforms at all that will get through the
codec, and actually encrypt.
Voice changing is possible, but encryption is not.
You _cannot_ - for example - exepect frequency inversion - to get
through the codec chain.
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