The GS1-U builds on the GS1-NR utility module and provides three functions. The first is a ring/cross modulator function using the same LM1496 balanced modulator/demodulator IC as found in the Roland System 100M circuits. The second provides a transistor noise generator which can output both white and pink noise. The third is a gate delay…

The GS1-D is a delay module that provides two types of customisable delay. Based on the PT2399 digital delay IC with a delay from 30ms to 340ms, the standard “delay” mode allows for normal echo/delay effects that can range from a flanger (short delay) to a classic dirty delay. The IC itself is used on…

The GS1-M is a switchable averaging or summing mixer. Typically, with audio signals, you want to provide a unity gain style mixer, i.e. the signals are mixed, or as we call it here, averaged, while maintaining a common gain across all signals. So you keep the same volume essentially. Sometimes you may want to boost…

The GS1-O is based on the classic Curtis CEM3340 VCO IC. The circuit can use either a CEM3340 (the Rev G re-release is readily available, and of course if you have some older NOS you can use those also) or the Alfapar AS3340 clone IC. The IC provides Triangle, Square and Sawtooth right from the…

The GS1-NR is a simple utility module that provides two functions. The first is a ring/cross modulator function using the same LM1496 balanced modulator/demodulator IC as found in the Roland System 100M circuits. The second provides a transistor noise generator which can output both white and pink noise. The module ring modulation circuit allows for…