Just attended a great talk at a Carnegie Mellon mini-symposium called Eliciting Environments organized by the School of Architecture. Michael Szivos with Madeline Gannon got us up to speed on basic sound analysis with Processing and how to visualize music in our work.  http://elicitingenvironments.org/work...  This was a quick experiment in using SoundFlower, Processing, ControlP5, Minim, and FFT to create a an audio visualization with simple circular shapes. The sliders control the audio threshold, the stroke minimum, and the stroke maximum.  What I found very interesting was when I entered negative values for the ellipse stroke width. What you end up with is some really interesting starburst effects. Awesome! :)  Music: OVERWERK - Daybreak