Media

Audio Loudness LUFS Normalizer

Measure integrated LUFS, true peak, and LRA, then normalize audio to Spotify, Apple Music, broadcast, or custom targets

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-loudness-lufs-normalizer' \
  -F 'file=@/path/to/audioFile.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/audio-loudness-lufs-normalizer' \
  -F 'audioFile=/public/samples/mp3/waterfall.mp3' \
  -F 'targetPreset=spotify' \
  -F 'customIntegratedLufs=-16' \
  -F 'customTruePeakDb=-1.5' \
  -F 'customLra=11' \
  -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-loudness-lufs-normalizer

Parameters

Name	Type	Required	Description
audioFile	fileupload required	Yes	—
targetPreset	select	No	—
customIntegratedLufs	number	No	—
customTruePeakDb	number	No	—
customLra	number	No

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-loudness-lufs-normalizer": {
      "name": "audio-loudness-lufs-normalizer",
      "description": "Measure integrated LUFS, true peak, and LRA, then normalize audio to Spotify, Apple Music, broadcast, or custom targets",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=audio-loudness-lufs-normalizer",
      "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-loudness-lufs-normalizer",
    "arguments": {
  "audioFile": "/public/samples/mp3/waterfall.mp3",
  "targetPreset": "spotify",
  "customIntegratedLufs": -16,
  "customTruePeakDb": -1.5,
  "customLra": 11,
  "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).