Upload script audio

Use this endpoint to upload the script audio. These may then be later referred to when creating videos.

If you want to use your own text-to-speech engine instead of the one provided by Synthesia, upload generated audio and use it instead of a script when creating Synthesia videos.

Note: when script audio is uploaded, async processing flows are triggered for the script audio. Check the status of the asset to make sure the processing is completed before creating a video using the script audio asset ID, as any attempts to generate a video with that asset will fail until those async processing flows are completed. Use the Get user media asset endpoint to check on the status of an uploaded asset.