An event that triggers when an audio file has completed transcoding.
The onAudioTranscoded() event handler runs when an uploaded audio file
has finished transcoding. Audio files that have been imported aren't immediately available until
the transcoding has completed.
It is fired after the onFileUploaded event, and after the transcoding has completed. The FileEvent
object contains information about the uploaded audio file and the upload context.
Note: Backend events don't work when previewing your site.
The uploaded file information.