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Audio Vocoder

Apply a vocoder effect using a carrier and modulator

Creates robotic, electronic voice effects by analyzing the spectral envelope of a modulator signal and applying it to a carrier signal. Classic effect used in electronic music, sci-fi, and voice synthesis.

Click to upload file or drag and drop file here

Maximum file size: 200MB Supported formats: audio/*

The voice or instrument to be vocoded (analyzed for spectral content).

Type of carrier signal that provides the timbre. Synth = clean electronic, Noise = gritty texture.

Base frequency for the synthesized carrier. Lower = deeper voice, Higher = brighter.

Waveform shape of the carrier oscillator.

Number of frequency bands to analyze. More bands = clearer articulation, less = smoother.

Window size for spectral analysis. Shorter = more responsive, Longer = smoother transitions.

0 0.8 1

Balance between dry (original) and wet (vocoded) signal.

Key Facts

Category
Media
Input Types
file, select, number, range
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

The Audio Vocoder tool applies a classic vocoder effect to create robotic or electronic voice sounds. It analyzes the spectral content of a modulator audio file and applies it to a carrier signal, perfect for music production, sound design, and creative audio projects.

When to Use

  • •When creating robotic or synthesized voice effects for music tracks.
  • •When designing sound effects for sci-fi or futuristic media.
  • •When experimenting with voice synthesis and electronic audio manipulation.

How It Works

  • •Upload a modulator audio file, such as a voice recording or instrument track.
  • •Choose a carrier type and adjust parameters like frequency, waveform, and analysis settings.
  • •Set the wet/dry mix and output format, then process to generate the vocoded audio file.

Use Cases

Adding robotic vocals to electronic dance music tracks.
Creating alien or robot voiceovers for video games or films.
Transforming spoken word into synthesized speech for artistic projects.

Examples

1. Robotic Vocals for EDM Track

Music Producer
Background
A producer wants to add a futuristic robotic voice to their electronic dance music track.
Problem
The raw vocal recording sounds too natural and doesn't fit the sci-fi theme.
How to Use
Upload the vocal recording as the modulator file, select 'Synthesized Carrier' with a sawtooth waveform, set carrier frequency to 150 Hz, and adjust bands to 24 for clear articulation.
Example Config
carrierType: synth, carrierFreq: 150, carrierWaveform: sawtooth, bands: 24, mix: 0.9
Outcome
The processed audio has a distinct robotic quality that blends seamlessly with the electronic beats.

2. Alien Voice Effect for Game Character

Sound Designer
Background
Creating voice effects for an alien character in a video game.
Problem
Need a unique, otherworldly voice that isn't human-like.
How to Use
Use a noise carrier with a high analysis window for smoother transitions, and set mix to 1.0 for full effect.
Example Config
carrierType: noise, analysis: 100, mix: 1.0
Outcome
A gritty, alien-sounding voice that enhances the game's atmosphere.

3. Synthesized Speech for Art Installation

Artist
Background
An artist is creating an interactive audio installation with transformed spoken word.
Problem
The spoken word needs to be converted into a synthetic, machine-like voice.
How to Use
Upload the spoken word file, choose a harmonic-rich carrier, and reduce bands to 8 for a smoother, less articulate sound.
Example Config
carrierType: harmonic, bands: 8, mix: 0.7
Outcome
The speech becomes a haunting, synthetic voice that fits the artistic vision.

Try with Samples

audio, text, barcode
Copyright-Free MP3 Audio Samples
Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
title token audio
audio
Copyright-Free AAC Audio Samples
High-quality AAC encoded audio samples for testing and development, featuring nature sounds and meditation music with excellent compression
title token audio
audio
Copyright-Free WAV Audio Samples
Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
title token audio
audio
Copyright-Free OGG Vorbis Audio Samples
Open-source OGG Vorbis audio samples for testing and development, featuring excellent compression with nature sounds and meditation music
title token audio
audio

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FAQ

What is a vocoder effect?

A vocoder effect analyzes the spectral envelope of a modulator signal and applies it to a carrier signal, creating robotic or electronic voice sounds.

What audio formats are supported for input and output?

Input supports common audio formats like MP3, WAV, etc. Output can be MP3, AAC, M4A, OGG, Opus, FLAC, or WAV.

Can I use my own carrier signal?

No, the tool uses synthesized carriers like synth, noise, pulse, or harmonic-rich signals. You cannot upload a custom carrier file.

How do I adjust the clarity of the vocoded voice?

Increase the number of frequency bands for clearer articulation or decrease for a smoother effect. Adjust the analysis window for responsiveness.

Is there a file size limit for the modulator audio?

Yes, the modulator audio file must be under 200 MB.

API Documentation

Request Endpoint

POST /en/api/tools/audio-vocoder

Request Parameters

Parameter Name Type Required Description
modulatorFile file (Upload required) Yes The voice or instrument to be vocoded (analyzed for spectral content).
carrierType select No Type of carrier signal that provides the timbre. Synth = clean electronic, Noise = gritty texture.
carrierFreq number No Base frequency for the synthesized carrier. Lower = deeper voice, Higher = brighter.
carrierWaveform select No Waveform shape of the carrier oscillator.
bands number No Number of frequency bands to analyze. More bands = clearer articulation, less = smoother.
analysis number No Window size for spectral analysis. Shorter = more responsive, Longer = smoother transitions.
mix range No Balance between dry (original) and wet (vocoded) signal.
outputFormat select No -

File type parameters need to be uploaded first via POST /upload/audio-vocoder to get filePath, then pass filePath to the corresponding file field.

Response Format

{
  "filePath": "/public/processing/randomid.ext",
  "fileName": "output.ext",
  "contentType": "application/octet-stream",
  "size": 1024,
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}
File: File

AI MCP Documentation

Add this tool to your MCP server configuration: 

{
  "mcpServers": {
    "elysiatools-audio-vocoder": {
      "name": "audio-vocoder",
      "description": "Apply a vocoder effect using a carrier and modulator",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-vocoder",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

You can chain multiple tools, e.g.: `https://elysiatools.com/mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp`, max 20 tools.

Supports URL file links or Base64 encoding for file parameters.

If you encounter any issues, please contact us at [email protected]