Justin Windle at Soulwire posted a nice particle node sequencer created in Flash using the Tonfall Audio Engine, the new open source AS3 audio engine produced by Andre Michelle.
This sequencer is based around physical nodes, which connect to produce a variety of tones. There are two types of node, a neuron and a receptor, which are connected by synapses (apologies for the trite analogies). Neurons fire periodically, and if within a certain proximity of a receptor, this message is sent at a fixed speed along the bridging synapse. When the message arrives, the receptor is activated and responds by queuing it’s individual tone within the audio engine. Each receptor owns a randomly assigned note, and each neuron a randomly assigned octave; therefor a receptor will play it’s note in several different octaves depending on which neuron causes it to fire.
The Particle Sequencer is available to download from Soulwire.