Voice scrambler or encryption

[firosiro]

Seeing a match of table tennis involving two gamers that are combination-bat is unless you're a participant yourself, similar to watching fencing -- pointless. Only then can you know why they look gloomy if they misread the twist. The game is only going to survive if it stays a spectator sport that is fantastic. This was in 1983. Ironically, the International Table Tennis Federation (ITTF) has since then mastered that mix bats have to be a different color on each side, so that a player could see that surface his competitor is using. https://www.linkedin.com/company/ping-pong-sport/ However there are still many for the good of the sport. The outcome is a game which sets an emphasis on a participant's gear, instead of his ability, and favours dull mistakes over rallies that are exciting. Table tennis needs to be a match of rallies as was pointed out in a ITTF executive board assembly. People see it. Rubbers that are various are creating the sport. In reality, they are ruining it.

 

[dr pepper]

I cannt find any reference to that chip so I dont know exactly what your trying to do or how secure you need this.
I built something similar to one of these a while back, it destroys legibility however some scanners & radios nowadays have a built in decoder for this kind of thing.
Obviously you'd need to interface it with the 'phone line, which is probably illegal.

**broken link removed**

 

[ci139]

https://www.youtube.com/results?search_query=digital+signal+processors+synthesizers+voice+processing

 

[Reloadron]

You may want to start with telephone encryption methods. Some of the simple early encryption involved digitizing and then inverting the audio.

Check out this Wiki...
A secure telephone is a telephone that provides voice security in the form of end-to-end encryption for the telephone call, and in some cases also the mutual authentication of the call parties, protecting them against a man-in-the-middle attack. Concerns about massive growth of telephone tapping incidents led to growing demand for secure telephones.

The link mentions Clipper, now officially discontinued, but still available on SourceForge. You may want to see what that is all about.

Ron