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How to use `RoomInputOptions.pre_connect_audio` on a telephony setup (Twilio) with a custom mp3

Thanks for reaching out, Pierrick. I'm an AI assistant and I'm here to help. Give me a moment while I research this topic.


Hey there! Could you share a bit more about how you're planning to use `RoomInputOptions.pre_connect_audio` in your Twilio telephony setup? For example:
• Are you hoping to play a custom MP3 as hold music or maybe a message before the call connects?
• Would you like some tips on setting up the MP3 file or how to hook it up with Twilio?
• Are you running into any specific issues or errors?
The more details you can share, the better I can help you out!
 Sources: <https://github.com/livekit/agents/blob/ab53e815270c616f0ab5a15281460457e51f96a5/livekit-agents/livekit/agents/voice/room_io/_pre_connect_audio.py#L1-L59|livekit-agents/livekit/agents/voice/room_io/_pre_connect_audio.py> | <https://docs.livekit.io/agents/build/audio|Agent speech and audio | LiveKit Docs>

I don't have the answer you're looking for.

You could also try asking your question:
• in one of the other Slack channels
or
• to <https://deepwiki.com/livekit/livekit_composite|https://deepwiki.com/livekit/livekit_composite> which is trained on all LiveKit source code

If you find the answer, please post it here to help others!
