Media

Audio Vocoder

Apply a vocoder effect using a carrier and modulator

file· File resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

# 1) Upload each file first → returns { filePath }
curl -X POST 'https://api.elysiatools.com/upload/audio-vocoder' \
  -F 'file=@/path/to/modulatorFile.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/audio-vocoder' \
  -F 'modulatorFile=/path/to/file.ext' \
  -F 'carrierType=synth' \
  -F 'carrierFreq=100' \
  -F 'carrierWaveform=sawtooth' \
  -F 'bands=16' \
  -F 'analysis=50' \
  -F 'mix=0.8' \
  -F 'outputFormat=mp3'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/audio-vocoder

Parameters

Name	Type	Required	Description
modulatorFile	fileupload 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

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

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

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "audio-vocoder",
    "arguments": {
  "modulatorFile": "https://example.com/file.ext",
  "carrierType": "synth",
  "carrierFreq": 100,
  "carrierWaveform": "sawtooth",
  "bands": 16,
  "analysis": 50,
  "mix": 0.8,
  "outputFormat": "mp3"
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

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