Possible audio content types.

| Enums ||
|---|---|
| `AUDIO_CONTENT_TYPE_UNSPECIFIED` | Audio content type is not specified in this version. This enum is a place holder for a default value and does not represent a real content stream type. |
| `AUDIO_CONTENT_TYPE_UNKNOWN` | The audio content type is unknown. |
| `AUDIO_CONTENT_TYPE_MUSIC` | The audio content type is music. |
| `AUDIO_CONTENT_TYPE_BROADCAST` | The audio content type is broadcast. |
| `AUDIO_CONTENT_TYPE_PODCAST` | The audio content type is podcast. |
| `AUDIO_CONTENT_TYPE_CATCH_UP_RADIO` | The audio content type is catch-up radio. |
| `AUDIO_CONTENT_TYPE_WEB_RADIO` | The audio content type is web radio. |
| `AUDIO_CONTENT_TYPE_VIDEO_GAME` | The audio content type is video game. |
| `AUDIO_CONTENT_TYPE_TEXT_TO_SPEECH` | The audio content type is text-to-speech. |