Author here. If you follow the github link, you'll see a few sample images and a live demo. It uses WebAudio to capture audio samples, runs FFT to calculate ACF

Author here. If you follow the github link, you'll see a few sample images and a live demo. It uses WebAudio to capture audio samples, runs FFT to calculate ACF and renders the result in polar coordinates with WebGL. Works on desktop (Ubuntu) Chrome at 60 fps. Yes, you need to remove spaces from the link, because the HN's spam filter is ludicrous.