The voice changer modifies audio or music by varying the level(amplitude) of recorded sound very quickly. Depending on how fast the changes are, it can change the voice in a variety of interesting ways.
Experiment with different settings to get variety of effects.
Options
Modulation Frequency: Modulation Frequency controls how fast the amplitude should be modified. This value is set in Hz (cycles per second).
Amplitude: The amplitude of the modulation signal. This control how the overall level of the output signal is modified. A value of 1.0 will leave the signal at the same level. A lower value will reduce the level, and a value higher than 1.0 will amplify the resultant signal.
Technospeak: The modulation signal that's used is a Sine Wave of the specified frequency and amplitude.