Hi, I am the creator of this visualization. I didn't know that it was posted last night, but I can answer any questions you have now. I've added a "Tips/things to try" modal to it. I don't know how many of you tried the audio portion of the visualization, but it's a cool and more unique part of the demo!

The github link is here: https://github.com/bgrawi/Fourier-Visualizations