Circuli in action
Circuli is a generative musical instrument conceptualized and developed by Batuhan Bozkurt in 2012, and is now an IOS app. The circles on the interface grow at a constant rate, and do not overlap. Bigger circles push and shrink smaller circles when in contact. A circle pops and makes noise when its boundary intersects the center of another circle. The pitch is decided by the position of the circle on the background. The bigger the hole is, the higher the pitch. The envelope of the produced sound seems to be determined by a number of parameters including the final circle size and the time of interaction between two involved circles. This project to me seems to make sense visually and is coherent to its audio component. It creates a multi-sense concert in a way.
source : https://earslap.com/page/circuli.html