> For the complete documentation index, see [llms.txt](https://docs.vdo.ninja/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.vdo.ninja/advanced-settings/audio-parameters/sync.md).

# \&sync

Viewer-Side Option! ([`&view`](/advanced-settings/mixer-scene-parameters/view.md), [`&scene`](/advanced-settings/mixer-scene-parameters/scene.md), [`&room`](/advanced-settings/setup-parameters/room.md))

## Options

Example: `&sync=50`

| Value           | Description |
| --------------- | ----------- |
| (integer value) | value in ms |

## Details

`&sync=X` will set an offset in milliseconds for the audio stream.

[`&buffer=0`](/advanced-settings.md#buffer) or `&sync=0` will do the same thing: it will try to auto-sync video and audio.

Tiny negative offsets *may* work, like `&sync=-25` is possible, but large negative offsets will not work.

No clue if it is supported in OBS or not; works in Chromium/Chrome v76 or newer tho. Useful if the video device has a large delay that needs compensating for that isn't fixed automatically.

`&sync=500` without the [`&buffer`](/advanced-settings/video-parameters/buffer.md) command also will only add an audio delay; there will be no additional video buffer or delay.

{% hint style="info" %}
Using may stop [Echo Cancellation](/advanced-settings/audio-parameters/aec.md) from working.
{% endhint %}

## Related

{% content-ref url="/pages/-MZdtO5YNVAt2R8vG5Us" %}
[\&buffer](/advanced-settings/video-parameters/buffer.md)
{% endcontent-ref %}

{% content-ref url="/pages/h2JmCAiOBzHayGu72EVo" %}
[\&buffer2](/advanced-settings/video-parameters/and-buffer2.md)
{% endcontent-ref %}


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