Media

Audio Set VBR

Convert audio using Variable Bitrate (VBR) for efficient quality

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-set-vbr' \
  -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-set-vbr' \
  -F 'audioFile=/path/to/file.ext' \
  -F 'outputFormat=mp3' \
  -F 'quality=4' \
  -F 'sampleRate=auto' \
  -F 'channels=auto' \
  -F 'keepMetadata=true'

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-set-vbr

Parameters

Name	Type	Required	Description
audioFile	fileupload required	Yes	—
outputFormat	select	No	—
quality	select	No	—
sampleRate	select	No	—
channels	select	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-set-vbr": {
      "name": "audio-set-vbr",
      "description": "Convert audio using Variable Bitrate (VBR) for efficient quality",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=audio-set-vbr",
      "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-set-vbr",
    "arguments": {
  "audioFile": "https://example.com/file.ext",
  "outputFormat": "mp3",
  "quality": "4",
  "sampleRate": "auto",
  "channels": "auto",
  "keepMetadata": true
}
  }
}

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).

Browse tools Open tool