Media

Audio Sidechain Compress

Mix two tracks using sidechain compression (e.g., voice or ads audio when overlaying sidechain audio)

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-sidechain-compress' \
  -F 'file=@/path/to/mainAudio.ext'
curl -X POST 'https://api.elysiatools.com/upload/audio-sidechain-compress' \
  -F 'file=@/path/to/sidechainAudio.ext'

# 2) Call the tool with the returned filePath values
curl -X POST 'https://api.elysiatools.com/en/api/tools/audio-sidechain-compress' \
  -F 'mainAudio=/path/to/file.ext' \
  -F 'sidechainAudio=/path/to/file.ext' \
  -F 'offset=e.g., 5 or 00:00:05' \
  -F 'threshold=-20dB' \
  -F 'ratio=4' \
  -F 'attack=20' \
  -F 'release=300' \
  -F 'outputFormat=mp3' \
  -F 'sampleRate=auto' \
  -F 'channels=auto'

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-sidechain-compress

Parameters

Name	Type	Required	Description
mainAudio	fileupload required	Yes	—
sidechainAudio	fileupload required	Yes	—
offset	text	No	—
threshold	text	No	—
ratio	text	No	—
attack	text	No	—
release	text	No	—
outputFormat	select	No	—
sampleRate	select	No	—
channels	select	No	—

File-type parameters must be uploaded first via POST /upload/audio-sidechain-compress, then the returned filePath is passed to the corresponding file field.

Response format

File result

JSON

{
  "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)"
}

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-sidechain-compress": {
      "name": "audio-sidechain-compress",
      "description": "Mix two tracks using sidechain compression (e.g., voice or ads audio when overlaying sidechain audio)",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=audio-sidechain-compress",
      "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-sidechain-compress",
    "arguments": {
  "mainAudio": "https://example.com/file.ext",
  "sidechainAudio": "https://example.com/file.ext",
  "offset": "e.g., 5 or 00:00:05",
  "threshold": "-20dB",
  "ratio": "4",
  "attack": "20",
  "release": "300",
  "outputFormat": "mp3",
  "sampleRate": "auto",
  "channels": "auto"
}
  }
}

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).

File parameters accept a public file URL only (https://…). Local paths, data: URIs, and Base64 strings are not supported.

Questions or issues? Contact [email protected]