via John Burtell:
"I have a recent experimental/noise project for which I have been developing a number of software-based "circuits". One of these in particular I find quite useful and would like to share how it works. I think it also falls in-line with the growing crop of boutique hardware noise synths. Attached is a diagram of circuit's operation.
Description:
A varying signal such as noise is fed into a sample-and-hold module. This module is essentially four separate sample-and-holds that are activated in succession whenever an impulse is received at the trigger input. The rate of succession is determined by a clock signal at the clock input. Each of the sample-and-holds controls the frequency of an oscillator; the frequency range is controlled by the blue knobs. The output of the oscillators are then sent to a comparator object which swithces between two states (+1, -1).
This circuit is quite useful for generating interesting drones and noises. It has served as the basis for the track domains 02 by imhul.
The circuit and corresponding diagram was mocked-up in a nifty modular synthesis program called Analog Box 2. http://code.google.com/p/analog-box/
I have shared it here because I believe it can be easily ported to other modular software programs as well as hardware. Please feel free to use and abuse as you will. Any questions can be sent to imhulsound (at) gmail (dot) com."
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