BeatDetektor 3 WebGL Demo / Visualizer with Drag + Drop audio support
Code and Music by Charles J. Cliffe
Thanks to Corban Brook @corban for the FFT implementation.
Requires browser with Web Audio API and WebGL support plus a decent graphics card.
Drag + Drop and OGG or MP3 file to change the music. Music with BPM of 100-150 recommended for best detection.