| Name | Type | Description | Notes |
|---|---|---|---|
| encoding | String | Encoding of audio file like MP3, WAV etc. | |
| sampleRate | Number | Sample rate of the audio file. | |
| languageCode | String | Language spoken in the audio file. | [default to 'en-US'] |
| content | String | base64 encoding of the audio file. | |
| speakers | Number | Number of speakers in the file (-1 for unknown speakers) | [default to -1] |