“This tutorial will explain how to build an Audio Visualizer with an Arduino Uno and some addressable LEDs. This is a project I’ve been wanting to do for some time now because I’m a sucker for sound reactive lights. These lights use the FFT (Fast Fourier Transform) library to compute the frequency peaks heard by the built in mic and displays each frequency in a different color.
I had originally planned to include a button and some alternative modes for the display but I didn’t get a chance to write the code for it. If you have some Arduino experience it shouldn’t be too hard for you to modify my code to include other animations or even just different colors. Al you’ll need to add is a button with a 330 ohm resistor.”