Fake audio spectrum, using perlin noise

from blog Muffin Man, | ↗ original
Few days ago, I was chatting with our design team, and we were wondering how hard would be to create a fake audio spectrum (that mimics human speech) and visualize it. I immediately said it should be easy, and that I will play with it over the weekend. Of course, I didn't wait for the weekend, but wrote it the same evening. It was fairly...