# Sound

You can also define a running sound for your machine.

The sound must be a OGG file and must be loaded in-game. Sounds are differents than models and textures and must be registered to be usable so for using custom sounds you will have either to use a mod that let you add sounds to the game or replace an existing sound with a resource pack and use it's name in the property.

The property must be defined as such :

```json5
{
    "appearance": {
        "sound": "namespace:sound_location"
    }
}
```

{% hint style="info" %}
If no sound property is set the machine will just make no sound.
{% endhint %}


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