From the Author:
Harmogram is an audio-visual experiment.
basically, its an artist version of a Fast Fourier transform
combined with what one could call a harmograph.
HTML, CoffeScript, SCSS, Compass...
HTML5 Audio API, for the audio element player and for the great analyser that comes built in...
the Canvas element for some crazy visualisations using a vector drawing library (Paper.js), and requestAnimationFrame, of course :)
plus a bunch of CSS magic.