---
title: Change Audio Playback Speed API
slug: change-audio-playback-speed-api
url: https://apyhub.com/freedailypro/service/change-audio-playback-speed-api
provider: FreeDailyPro
tags: [audio, speed, playback speed, tempo, slow down, speed up, audio processing]
auth: api_key
version: 1.0.0
service_type: sync
endpoints: 1
atoms: 10
mcp: true
---

# Change Audio Playback Speed API

Speed up or slow down any audio file from 0.5x to 2x with one API call. Upload MP3, WAV, FLAC and more, and get the adjusted audio back instantly.

## Endpoints

| Method | URL | Description | Atoms |
| --- | --- | --- | --- |
| POST | `https://api.eu.apyhub.com/freedailypro/change-audio-playback-speed-api/audio-speed` | What it does Changes the playback speed of an uploaded audio file and returns the adjusted audio as… | 10 |

## Endpoint reference

### Change audio speed

`POST https://api.eu.apyhub.com/freedailypro/change-audio-playback-speed-api/audio-speed` · 10 atoms · accepts `multipart/form-data` · returns `application/json`

| Parameter | In | Type | Required | Description |
| --- | --- | --- | --- | --- |
| `file` | body | string (binary) | yes | The audio file. Up to 30 MB. |
| `speed` | body | number | yes | Between 0.5 and 2.0, for example 1.5 |

#### Quickstart

Speed up an audio file to 1.5 times its original speed.

```bash
curl -X POST "https://api.eu.apyhub.com/freedailypro/change-audio-playback-speed-api/audio-speed" \
  -H "apy-token: $APY_TOKEN" \
  -F "file=@/path/to/audio.mp3" \
  -F "speed=1.5"
```

#### What you'll get back

Returns a binary file (`string` with `format: binary`) containing the converted audio output.

## About

## What it does
Audio Speed Changer lets you send an audio file and a playback speed, then get the transformed audio back as a binary file. It is designed for straightforward time-stretching and speed-up or slow-down workflows without changing your integration shape.

POST the file in `body.file` and set `body.speed` to a number between `0.5` and `2.0`. The service accepts audio files up to 30 MB and returns the modified audio as binary output. Use it when you need to produce quicker preview clips, slow down spoken content for review, or generate alternate playback versions for your app.

Because the response is a file, it fits cleanly into automation pipelines: upload, transform, store, and serve. Audio Speed Changer is a good fit for media tools, learning products, podcast workflows, and any backend that needs to alter playback speed programmatically.

## Usage

Base URL: `https://api.eu.apyhub.com` (default region — see
`GET https://apyhub.com/api/public/regions` for the rest).

Authenticate with an ApyHub API key in the `apy-token` header.
Full docs and a live playground: https://apyhub.com/freedailypro/service/change-audio-playback-speed-api