Hello,
I have an old Intel Pentium D 2.80GHz PC with Volumio installed (6.12.57-volumio x86_64).
Debian 12.13, Python 3.11.2.
I have installed LedFx v2.1.3 (thanks ChatGpt), without apt upgrade, and it works great without interfering with Volumio.
I managed to synchronize LedFx and Volumio (thanks Gemini) without PulseAudio (Loopback).