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Audio Resample Speed

Change speed by resampling (pitch shifts with speed)

Varispeed-style change: resamples the audio so speed and pitch move together, like tape speeding up or slowing down.

Click to upload file or drag and drop file here

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

Key Facts

Category
Media
Input Types
file, number, select
Output Type
file
Sample Coverage
4
API Ready
Yes

Overview

This tool changes audio playback speed by resampling, which simultaneously alters pitch, similar to speeding up or slowing down a tape. It supports common audio formats and allows you to adjust the speed factor and output format.

When to Use

  • •When you need to adjust the tempo of an audio recording without separating pitch and speed changes.
  • •For creating varispeed effects in audio production, like tape-style speed adjustments.
  • •To quickly speed up or slow down audio for review, practice, or editing purposes.

How It Works

  • •Upload an audio file in a supported format such as MP3, WAV, or AAC.
  • •Set the speed factor between 0.25 and 3 to increase or decrease playback speed.
  • •Choose an output format like MP3, FLAC, or WAV for the processed audio.
  • •Process the file and download the resampled audio with the new speed and pitch.

Use Cases

Adjusting the tempo of music tracks for practice, remixing, or creative projects.
Speeding up podcasts or audiobooks to save time during listening.
Slowing down audio recordings for detailed analysis or learning purposes.

Examples

1. Speed Up a Podcast for Commute

Background
You have a one-hour podcast episode and want to listen during a 40-minute commute.
Problem
The episode is too long to finish in the available time.
How to Use
Upload the podcast audio file, set the speed factor to 1.5, and select MP3 as the output format.
Outcome
The podcast plays 50% faster, allowing you to complete it within your commute without missing content.

2. Slow Down a Guitar Solo for Practice

Background
A music student is learning a fast guitar solo from a recording.
Problem
The solo's speed makes it difficult to follow and replicate accurately.
How to Use
Upload the music file, set the speed factor to 0.75, and choose WAV output for high quality.
Outcome
The solo slows down by 25%, making it easier to learn and practice at a manageable pace.

Try with Samples

audio, file
Copyright-Free AAC Audio Samples
High-quality AAC encoded audio samples for testing and development, featuring nature sounds and meditation music with excellent compression
title token audio
audio
Copyright-Free MP3 Audio Samples
Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio
title token audio
audio
Copyright-Free WAV Audio Samples
Uncompressed PCM WAV audio samples for testing and development, mirrored from MP3 set with nature sounds and meditation music
title token audio
audio
Copyright-Free OGG Vorbis Audio Samples
Open-source OGG Vorbis audio samples for testing and development, featuring excellent compression with nature sounds and meditation music
title token audio
audio

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FAQ

What audio formats can I upload?

You can upload common audio formats including MP3, WAV, AAC, and others, with a file size limit of 200 MB.

How does resampling affect pitch?

Resampling changes both speed and pitch together; increasing speed raises pitch, and decreasing speed lowers it.

Can I change speed without altering pitch?

No, this tool uses resampling, so pitch always changes with speed. For pitch-independent adjustments, use a time-stretching tool.

What is the range for the speed factor?

The speed factor can be set from 0.25 (slower) to 3 (faster), with a default of 1.2.

Is there a limit on audio file length?

There is no specific length limit, but files must be under 200 MB in size.

API Documentation

Request Endpoint

POST /en/api/tools/audio-resample-speed

Request Parameters

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

File type parameters need to be uploaded first via POST /upload/audio-resample-speed 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-resample-speed": {
      "name": "audio-resample-speed",
      "description": "Change speed by resampling (pitch shifts with speed)",
      "baseUrl": "https://elysiatools.com/mcp/sse?toolId=audio-resample-speed",
      "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]