Basic implementation of an FFT audio spectrum in browser demonstrating fast and good looking visuals similar to that of pre-rendered videos are possible in real-time and in-browser.
To use either provide a youtube/soundcloud link in the hash such as https://6f.io/spectrum#https://youtube.com/watch?v= or drag and drop a local media file onto the web page.
Works in the latest versions of Chrome and Edge (webkit). Firefox has a bug
clip-path does not respect
backdrop-filter and so does not display