I'm using the AWS Transcribe example from https://github.com/amazon-archives/amazon-transcribe-websocket-static with a simple modification on the websocket query-string to add speaker labels.
The current websocket URL path and querystring are /stream-transcription-websocket and ?language-code=it-IT&media-encoding=pcm&sample-rate=16000&show-speaker-label=true&max-speaker-label=10 but the returned event messages are exactly the same as those without speaker label inserted.
What is the correct query-string for the current use-case?