Schematic Rise

With this schema you can modify how your voice sounds by changing the pitch of your voice. This schema can be connected to a phone and with a duplicate schema on the end of the phone line, you can have a scrambled voice communication. The way the schema works is as follows: If we cut the schema in half at the T2 transformer and include the LM324 on the left side, you will see that the LM324 portion of the schema is a tone oscillator which shifts the frequency of all input signals to a new higher frequency. When the voice and the tone oscillator mix frequencies the voice is not recognized. The voice signal is then inputted to the second stage which again shifts the voice signal again. I recommend that the first stage be tuned to a frequency that is 100hz lower then the second stage.