It would be a nice addition to add audio support to the board and firmware as well.
If you have any knowledge about audio processing or ideas how to send audio on the bus, feel free to share your ideas here.

I've been able to enable and disable the audio mode already but now we need to process the data somehow as a first step.

Streaming an audio file via Homeassistant to the bus would be nice as well.
Or maybe even live audio streaming.

Resources:
https://community.home-assistant.io/t/is-there-a-way-to-stream-audio-from-one-esphome-to-another/581786/17
https://electronics.stackexchange.com/a/692106/580470
https://github.com/pschatzmann/arduino-audio-tools/wiki/External-ADC
https://forum.arduino.cc/t/using-operational-amplifiers-in-your-arduino-project/692648/4