Voice changer

A voice changer (also known as voice enhancer) is a device which changes the tone or pitch of or adds distortion to the user's voice.

Hardware implementations

The earliest voice changers were electronic devices usually used over the telephone for the purpose of disguise. There are low-priced, small lithium battery-powered voice changers that are used between a phone's mouthpiece and the user's mouth.^{[1][2][3][4][5]}

More sophisticated voice changers have different levels of various distortion effects variable by faders.^[6][7]

Software implementations

Nowadays, software implementations are very common. There is a plethora of techniques that modify the voice by using different algorithms.^[8][9] Most algorithms modify the voice by changing the amplitude, pitch and tone of the voice. The pitch plays an important role from changing a male voice into female voice, and vice versa. The results of voice changing through software are quite impressive and satisfactory.^[10]

"Voice cloning" software can mimic the sound of a specific person's voice based on recordings of that voice.^[11]