# 13325: Gather->Play: Invalid Content-Type

Log Level: ERROR

## Description

Play requires an audio `Content-Type`

### Possible causes

* Play references a URL that does not return audio or is returning an invalid `Content-Type`.

### Possible solutions

* Make certain the URL returns an audio file
* See the [Play Verb](/docs/voice/twiml/play) API Reference for more information on valid `Content-Type`s.