Screen captures from the free VOSC online app: http://vosc.glyfdesign.com
VOSC is built using the Stage3D feature of FlashPlayer11, leveraging GPU shaders to allow the manipulation of millions of particles on most hardware. Control multiple oscillators to create intricate patterns, or just load one of many presets.
A primary visual mechanism at work in VOSC is the phenomenon of visual harmony as explored by the computer graphics pioneer and visual artist John Whitney in the mid 20th century. The oscillators of VOSC operate in accordance with Whitney's principle of differential motion, giving rise to harmonic resonances as their frequencies move across whole ratios.