Note that the link is to something that is an audio spectrum analyzer/visualizer and not an equalizer. It's even called "Analyser" in the code. At first I was a

Note that the link is to something that is an audio spectrum analyzer/visualizer and not an equalizer. It's even called "Analyser" in the code. At first I was amazed that an equalizer could be implemented into a URL, I was wondering how one would input the gains for the frequency bands, but alas it just displays the volume at each frequency.