Use ESPHome device as audio RTSP streamer

[edurenye]

Describe the problem you have/What new integration you would like

Currently, the ESPHome devices like M5Stack ATOM Echo can be used as media players outputting digital streams, what I want is for them to be used as microphones for other systems producing an AAC or MP3 RTSP audio stream that could be played as output by another ESPHome device or to be processed by StreamAssist in Home Assistant.

Please describe your use case for this integration and alternatives you've tried:

I can't understand anything that the M5Stack ATOM Echo answers because its speaker is useless, so I want to use another media player to output the answer of my LLM. The idea is to use the ATOM Echo as a microphone, send the RTSP stream to StreamAssist have the LLM process the answer and play the answer in a better media player. But also I read that some people want to directly play the sound from a ATOM Echo in another media player in a different room, like a communication device (see: https://community.home-assistant.io/t/m5-atom-echo-audio-stream/746536/2)

Additional context

There is a repo for outputting RTSP video streams for the ESP32 Cam hardware (https://github.com/rzeldent/esp32cam-rtsp), but not only for audio streams, and it does not support other devices like the ATOM Echo.