ACProcessorSuite is a suite of custom plugins for Apple’s Quartz Composer, a realtime visual programming environment that comes free with Mac OS X (Developer Tools). Now updated for Mac OS X 10.6. Snow Leopard!
The main two plugins are – ACPlotter, an Oscillator-like line renderer, that plots a series of values over time – and ACSignalEnhancer that provides various smoothing and scaling algorithms to improve (for example) incoming sensory data. With ACSignalEnhancer it is easily possible to scale values from a range of Say 100 .. 255 to e.g. -1 .. +1.