--- title: documentAttributeAudio description: Document attribute audio image: https://docs.madelineproto.xyz/favicons/android-chrome-256x256.png --- # Constructor: documentAttributeAudio\_23 [Back to constructors index](index.md) Document attribute audio ### Attributes: | Name | Type | Required | Description | |----------|---------------|----------|-------------| |duration|[int](../types/int.md) | Optional|Duration| ### Type: [DocumentAttribute](../types/DocumentAttribute.md) ### Example: ```php $documentAttributeAudio_23 = ['_' => 'documentAttributeAudio', 'duration' => int]; ``` [PWRTelegram](https://pwrtelegram.xyz) json-encoded version: ``` {"_": "documentAttributeAudio", "duration": int} ``` Or, if you're into Lua: ```lua documentAttributeAudio_23={_='documentAttributeAudio', duration=int} ```