Websocket audio format is different on signed URL

[fire015]

We are using the agent websocket and connecting it to Twilio based off the code here - https://github.com/elevenlabs/elevenlabs-examples/tree/main/examples/conversational-ai/twilio/javascript

When audio data is received from ElevenLabs, we pass it onto Twilio and this plays the audio over the phone.

This works fine, unless you enable authentication on the agent. When receiving audio data from the signed URL and passing it onto Twilio it does not play over the phone (we still see the agent_response event).

I suspect the format of the audio is coming in different over a signed URL vs non signed.

Agent TTS output format is set to u-law 8000.

Please can you investigate and let us know so that we can connect to agents securely.