Vocoder

A vocoder is an audio effect that transforms a voice (or other audio signal) into a robotic or synthetic-sounding output by applying its vocal characteristics (frequencies, articulation) to a carrier signal (usually a synthesizer). The vocoder analyzes the spectral content of the modulator (voice) and imprints it onto the carrier, producing a harmonic and mechanical effect. Widely used in electro, funk, pop, hip-hop, and sci-fi soundtracks, vocoders are also great tools for experimental sound design.