Audio Time Stretch & Pitch

Change speed without pitch, or pitch without speed

Uses FFmpeg atempo for time-stretching and asetrate+atempo for pitch shifting.

Audio File *

Click to upload file or drag and drop file here

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

Mode

Tempo Factor

Pitch Shift (semitones)

Output Format

API Documentation

Request Endpoint

POST /en/api/tools/audio-time-stretch-pitch

Request Parameters

Parameter Name	Type	Required	Description
audioFile	file (Upload required)	Yes	-
mode	select	No	-
tempoFactor	number	No	-
semitones	number	No	-
outputFormat	select	No	-

File type parameters need to be uploaded first via POST /upload/audio-time-stretch-pitch 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-time-stretch-pitch": {
      "name": "audio-time-stretch-pitch",
      "description": "Change speed without pitch, or pitch without speed",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-time-stretch-pitch",
      "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]