![]() This lets me override or substitute CSS rules pretty trivially. There are a handful of differently colored themes for each visualization, and I do some rudimentary CSS namespacing by updating a class applied to the html element. Since I'm using D3 - which is just drawing SVG - I was able to style everything in CSS (no images are used at all, including icons). Each visualization uses the data a bit differently - it was mostly trial and error to get some stuff I liked looking at. I'm using d3.js to draw and redraw SVG based on this normalized data. ![]() ![]() I then normalize the data a bit (or transform it slightly depending on the visualization) and redraw the screen based on the updated array. Then, using requestAnimationFrame (with a little frame limiting for performance reasons) I'm updating that array as the music changes. There's a good tutorial on how to do this. Using the web audio api, I can get an array of numbers which corresponds to the waveform of the sound an html5 audio element is producing. Party-mode - An experimental music visualizer using d3.js and the web audio api.
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