arduino_cava lets you visualize audio on an 8x8 LED matrix using an Arduino Uno.
This project requires an 8x8 LED matrix. My personal recommendation is [this one on amazon](https://www.amazon.com/HiLetgo-MAX7219-Matrix-Display-Control/dp/B07W6KZR5D/ref=sr_1_5?keywords=8x8+led+matrix&qid=1677460193&sr=8-5).