Every fraction of a second, the loudness of incoming sound is analyzed while a grid of colored circles is generated. The size and color of each circle is determined by the degree of loudness at the moment it is generated (large & red = loud; small & blue = quiet). The entire grid also pulsates in realtime in response to loudness. After a while, each fixed circle eventually falls or drifts off the screen.
I used an excerpt of Brian Eno’s “Ambient 1: Music for Airports” in this example because of its long stretches of quiet punctuated by piano notes.


