Audio spectrum display (ESP32, WS2812B)

and foils from a broken LCD TV as a screen? there are several layers of different foils and one with 4mm plexiglass and everything is the size of the matrix, i.e. large sheets, and a broken TV can be found in a dumpster or probably in any normal RTV service you can probably get such foils for free I have a lot of it, because I leave plexiglass from broken matrices and I give foils to my daughter and she paints on it with markers

I made a preliminary inspection of the laptop display elements. That white sheet absorbs too much light, but that bottom silver one is interesting. You have to do trials