[azure-communication-callautomation] Streaming back data via WebSocket not working, can't hear my voice repeated back in the call.

[tan-phung-ts]

• Package Name: azure-communication-callautomation
• Package Version: 1.3.0b1
• Operating System: MacOS 15.0.1 (24A348)
• Python Version: 3.11.7

Describe the bug When using MediaStreamingOptions with custom transport_url to create a new call, then receive audio data and send it back immediately, no audio can be heard. I cannot seem to find any documentation talking about sending WebSocket data back to Azure.

To Reproduce Steps to reproduce the behavior:

1. Create a new call

       media_streaming_options = MediaStreamingOptions(
           transport_url=ws_base_url,
           transport_type=MediaStreamingTransportType.WEBSOCKET,
           content_type=MediaStreamingContentType.AUDIO,
           audio_channel_type=MediaStreamingAudioChannelType.MIXED,
           start_media_streaming=record,
       )
   
       call_conn_props: CallConnectionProperties = (
           await call_automation_client.create_call(
               target_participant=target,
               callback_url=AzureClientService._gen_events_callback_url(
                   base_url=base_url, call_id=call_id
               ),
               source_caller_id_number=source,
               media_streaming=media_streaming_options,
           )
       )

2. Receive the WebSocket connection. Send back the data (The whole object), I've tried sending back only the data, too, and it still won't work

   @router.websocket("/connect_call/{id}/azure")
   async def connect_call_azure(id: str, websocket: WebSocket) -> None:
   await ws.accept()
   while True:
       try:
           message: str = await ws.receive_text()
           await ws.send_text(data=message)
       except Exception as e:
           logger.error(
               message=f"Unknown Exception:{e}\n traceback:{traceback.format_exc()}"
           )
           break

Expected behavior In the call, I can hear my voice back when I speak.

Screenshots If applicable, add screenshots to help explain your problem.

Additional context Any documentation discussing this feature when using create_call with MediaStreamingOptions, how to handle the WebSocket connection, the format, and the data specifications would be great. Thanks.

[github-actions[bot]]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @minwoolee-msft.