Changing the MP3s on the Micro SD Card

Done with the Audio Guide? Follow this quick tutorial to customise your sounds and load your own MP3s.

micro SD card

The Touch Board comes pre-loaded with an Audio Guide to help familiarise you with all it’s features. However, we realise you’ll soon be an expert on all these and will want to move on to using them to build your own project. One of the first things you may want to do is change the sounds that the Electrodes will trigger.

Changing the sounds on your Micro SD card is very straightforward. The key is to follow the appropriate naming structure for your mp3s to ensure each Electrode will trigger the right sound.

Follow this quick tutorial to learn what this naming system is, and where to save your files.

For more tutorials on changing the code on your Touch Board, or painting to it with Electric Paint, just click on the Suggested Tutorials tab above or check out the MAKE page.


Materials To begin you will need:

1 x Touch Board

1 x micro USB cable
1 x Speaker or Headphones
1 x micro SD card adapter

Step 1 MP3 tracks

The first step is to select the sounds that you want your Touch Board to play. You may want to record your own sounds, or you may already have a library of audio to choose from. is also a great resource for sounds and music.

I’ve selected two tracks that I want to use: “bubbles.mp3” and “STE-101.mp3”, and put them in a folder titled Audio Tracks. If your tracks are not currently mp3s, you’ll need to convert them.

You can try the Online Audio Converter (see link below) if you need to do this.

Step 2 Micro SD Card Adapter

We’ve chosen to use a microSD card on the Touch Board in order to keep its footprint as small as possible. Unfortunately, this means that your computer probably won’t have a slot to insert the card directly.

To do this, you’ll need to purchase a SD card Adaptor or Reader. You may already have one from your camera of phone.

In this tutorial, I’m using a USB microSD card Reader.

Insert your reader into the USB on your computer, and then insert the microSD card from your Touch Board.

Step 3 Audio Tracks

Your micro SD card should show up on your desktop under the name “TB AUDIO”

When you click on it, you should see a series of files that look like the image on the right.

The document titled “README.txt” contains instructions on the Touch Board Audio, as well as the Audio Guide in written form. Don’t delete this document if you feel you may want to review these instructions in future.

It’s also important that you keep all the files in the top level of the SD card, a lot of these files are related to the workings of the Touch Board, so deleting or moving them may affect your board’s functionality.

You will see twelve tracks titled:
up to TRACK011.mp3

These are the files you need to replace to input your own audio. You can create a folder titled “AUDIO GUIDE” to save these files if you want to keep them for future reference.

Step 4 Replacing Audio Tracks

Now, for the bit you’ve been waiting for. Changing the audio tracks on the SD card.

Select the mp3 files that you want to put on the board, and drop them in the top level of your micro SD card. Make sure you’ve already moved the Audio Guide tracks to another folder.

In order for your Touch Board to read the audio tracks, these need to be named:
…up to TRACK011.mp3

TRACK000.mp3 will be for E0
TRACK001.mp3 will be for E1
TRACK003.mp3 will be for E3
and so on….

The tracks I’ve selected are for Electrode E0 and Electrode E10, so I’ve renamed my tracks to TRACK000.mp3 and TRACK010.mp3

As I haven’t put any other tracks, my remaining electrodes will not produce any sound.

Step 5 Re-insert your micro SD Card

Once you’ve re-named all your mp3 files according to the system above, you can eject your micro SD card, and slide it back into your Touch Board.

Step 6 Reset your Touch Board

Once your card is back in your board, press the “Reset” button on the bottom right hand corner. This will make your electrodes re-calibrate.

The orange light at the bottom left hand corner will flash while your Touch Board is resetting. Once it stops flashing you can touch any of the Electrodes you’ve created track for, and hear the sounds you’ve uploaded.

Step 7 Touch an Electrode

Now test one of the sensors. Touch your finger to one of the Electrodes you’ve created a track for and wait to hear the sound.


Congratulations, now what will you make? We’d love to see. Why not upload your project to our MAKE page, or email your photos to

Step 8 Cropping your mp3s

If you want to crop your tracks there’s some great free software online that will allow you to do this.

I use Online mp3 Cutter (see link below) when I want to shorten my audio clips.

If you have any other questions check out our FAQ section, or email us at We’re here to help!

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