This project uses a FFT to analyze Josha Sabin's track "U12" from the album Terminus Drift. I'm using three different shaders – one for the circle in the center, one for the blurry spikes on the sides and one to draw a half-transparent background that creates traces of the other two elements from earlier in the song. Here is a picture:
You will need openFrameworks to run this visualization but no addons are
necessary. Simply put it in a subfolder of apps or wherever you have
configured the projectGenerator to look for projects, run
openFramework's projectGenerator, run make, and do make run.
Alternatively, use QTCreator's openFramework's Qt Creator
plugin.
You start the music with the space key, and jump 15 seconds forward or backward with → and ←. s stops the song and f toggles fullscreen.
This projected is licenced under GPLv3.