# Play

## Play Attributes

| Name     | Allowed Values | Default Value |
| -------- | -------------- | ------------- |
| **Loop** | integer > 1    | 1             |

{% hint style="info" %}
&#x20;**loop.** The 'loop' attribute specifies how many times you’d like the audio file to be repeated. Specifying '0' will cause the the \<Play> verb to loop until the call is hung up.
{% endhint %}

## Supported Audio Formats

| MIME type   | Description      |
| ----------- | ---------------- |
| audio/wav   | wav format audio |
| audio/mp3   | mp3 format audio |
| audio/wave  | wav format audio |
| audio/x-wav | wav format audio |

\
Media Server Audio File Format
------------------------------

### Technical Specification and Capacity

#### The callapi Media Server is capable of:

{% hint style="info" %}
Media and Codecs:

* G711 (a-Law, u-Law);
* GSM;
* Linear PCM(L16);
* G729;
* DTMF(RFC 2833, INBAND)

Media Files:

* Wav (Sample rate 8000Hz, bit rate of 16, Mono);
* mp3 (Any sample rate)
* GSM
  {% endhint %}

## How to Convert a Wav File to the Correct Bitrate

{% hint style="info" %}
You can use a software call ffmpeg as follows:
{% endhint %}

```
ffmpeg -i source_file.wav -acodec pcm_s16le -ac 1 -ar 8000 result_file.wav
```

### Nesting

The  verb can not have any other verbs or nouns nested. Only a URL.

## Examples

{% hint style="info" %}
Example of how to use the  verb:
{% endhint %}

```xml
<Response>
    <Play>http://foobar.com/demo.wav</Play>
</Response>
<Response>
    <Play>http://foobar.com/demo.mp4</Play>
</Response>
```