# Sounds Prefabs

## Sounds[​](#sounds "Direct link to Sounds")

This array contains audio tracks associated with the effect. You can enable several audio tracks at once.

### Audio[​](#audio "Direct link to Audio")

A simple background audio track that loops by default.

**Usage**

```
"sounds": [

    {

        "audio": {

            "filename": "sound.ogg",

            "start": 0,

            "end": 10,

            "loop": true,

            "volume": 0.7

        }

        // ...

    }

    // ...

]
```

| Parameter  | Description                                                                                 |                               Optional                               | Default Value |
| :--------- | :------------------------------------------------------------------------------------------ | :------------------------------------------------------------------: | :-----------: |
| `filename` | Path to an audio track. The supported formats are `.ogg` and `.wav`.                        |                                  *+*                                 |      *+*      |
| `start`    | Playback start position in seconds.                                                         | ![\`${props.title} icon\`](/far-sdk/img/icons/check.svg "Supported") |      `0`      |
| `end`      | Playback end position in seconds. When omitted, playback continues to the end of the track. | ![\`${props.title} icon\`](/far-sdk/img/icons/check.svg "Supported") |     `null`    |
| `loop`     | Loops the audio track.                                                                      | ![\`${props.title} icon\`](/far-sdk/img/icons/check.svg "Supported") |     `true`    |
| `volume`   | Audio-track volume in the range `[0, 1]`.                                                   | ![\`${props.title} icon\`](/far-sdk/img/icons/check.svg "Supported") |      `1`      |

note

To use the audio prefab on the web, you must call `player.setVolume(1);` in your code.