My latest ESP32/Nextion touch screen Weather/bus/train times project required a realtime clock.... however it has taken me quite a few weeks to find a good solid solution.
Firstly :-
....if you want to stay sane then avoid epoch time (best thing that happened in 1970's was "punk Rock" not unix count my seconds since birth)....rant over.

So I started a little Hack-A-Thon project over Thanksgiving. I initially was just connecting a single ReSpeaker Mic Array V.2 to a RaspPi running Ubuntu Mate and went through the tutorials. I also looked at a project called ODAS which had some pretty cool looking visualizations of Direction of Arrival and Angle of Arrival of detected sound. Unfortunately their visualization does not really run well on the PI. But... I am able to run part of the project on the PI and push the sound localization data to port on another computer. Also, I really don't need the visualizations.

Ya .. not quite right - i do believe my spherical to real world coordinate system transformation is ... uh .. lacking in some way ...