Last updated: May 29, 2024
# Tutorial: loop audio clips with Transloadit & Uppy
**Joseph Grabski**
Content Lead · Rochester, United Kingdom · Show bio
[](https://x.com/joe%5Fgrabski)[](https://github.com/Missing-Tech)
Recently, I've been wondering which of our Robots deserves some more attention. One of our true unsung heroes, a reliable workhorse that tends to be neglected, is the[/audio/loop](/docs/robots/audio-loop.md) Robot.
Today, we are shining a spotlight on the [/audio/loop](/docs/robots/audio-loop.md) Robot by building a website that loops an audio clip for a specified duration. To help with this, we'll also be leveraging the mighty file-uploading tool [Uppy](https://uppy.io/).
## Our Assembly Instructions
Before we get into the nitty-gritty of making the website, let's go through the Assembly Instructions that we will use to loop our audio.
```json
{
"steps": {
"encode": {
"robot": "/audio/encode",
"use": ":original"
},
"loop": {
"robot": "/audio/loop",
"use": "encode",
"duration": 60
},
"export": {
"robot": "/s3/store",
"use": "loop",
"credentials": "S3_CREDENTIALS",
"result": true
}
}
}
```
We first encode the audio file to standardize our output file to MP3. Next, we pass this resultant file to the [/audio/loop](/docs/robots/audio-loop.md) Robot. When we send theAssembly Instructions, we will change the `duration` parameter to the value that the user set, but it will be set to 60 by default. Finally, let's store the result in an S3 bucket so we can present this file to the user. If you prefer, you can also use one of the other[export services that we integrate with](/services/file-exporting.md).
## The HTML scaffolding
Now that we have our Assembly Instructions, let's get started on the scaffolding. We will start by adding a little HTML for our website.
```html
Audio Looper
x
Audio Looper
Only accepts audio
```
Which ends up looking like this:
As you can see, it is a pretty basic website. The default styling is a little hard to stomach, though, so let's add just a pinch of CSS to spruce things up.
Inside of two `
x
