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Summary of Contents for Rossum EVOLUTION
- Page 1 EVOLUTION Variable Character Ladder Filter Operation Manual Copyright 2016 Rossum Electro-Music LLC www.rossum-electro.com...
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Page 2: Table Of Contents
Contents 1. Introduction 2. Module Installation 3. Overview 4. Input and Output 5. Frequency Control 6. Q Control 7. Genus Control 8. Species Control 9. Specifications 10. From Dave’s Lab: The Evolution of EVOLUTION 11. Acknowledgements... -
Page 3: Introduction
Rossum Electro-Music Evolution Variable Character Ladder Filter. This manual will give you the information you need to get the most out of Evolution. However, the manual assumes you already have a basic understanding of synthesis and synthesizers. If you’re just starting out, there are a number of good reference and tutorial resources available to get you up to speed. -
Page 4: Module Installation
2. Installation As you will have no doubt noticed, the rear of Evolution requires, at most, 85mA of +12V Evolution is a circuit board with exposed parts and 75mA of -12V. and connections. When handling Evolution, We have included both M3 and M2.5 (for it’s best that you hold it by the edges of the... -
Page 6: Overview
At the core of Evolution is Dave’s unique In the following sections, we’ll look at each of implementation of Bob Moog’s iconic ladder Evolution’s functions in turn. -
Page 7: Input And Output
The Input and Output jacks let you get audio into and out of Evolution. Evolution is DC coupled throughout, so you can use Evolution to process CVs as well as audio. The Input expects a signal level up to 20Vp-p... -
Page 8: Frequency Control
10 octave range (better than many Eurorack VCO modules). When in FREQUENCY Knob self-oscillation mode, Evolution serves as an The FREQUENCY extremely high quality sine wave oscillator. knob allows you to set FREQ CV2 Input Evolution’s initial cutoff... - Page 9 FREQ CV3 Input The FREQ CV3 Input is a control voltage input that is modified by its associated conventional attenuator and then summed with the value of the FREQUENCY knob and the FREQ CV2 and 1V/OCT inputs. When the attenuator knob is set to its maximum counter-clockwise position, no control voltage is passed to the filter.
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Page 10: Q Control
0V and 7V. sounding thin. When the Q knob is Luckily, Evolution gives you a choice with the turned clockwise to Q LEVEL COMPENSATION control. about 4V, the filter will... - Page 11 Q CV2 Input The Q CV2 Input is a control voltage input that is modified by its associated attenuverter and then summed with the value of the Q knob and the Q CV1 Input. (If you haven’t already read the explanation of how the attenuverters work back up in the FREQ CV2 Input section, you can check that out now.) Q CV1 Input...
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Page 12: Genus Control
7. Genus Evolution’s Genus Not only does being able to select the control gives you real- number of poles give Evolution a variety of time manual and CV filter characteristics, the ability to modulate control of the number the number of poles in real time (including of poles in the ladder. - Page 13 A swing of 5 volts (either from the Genus attenuverters work by now.) knob or via the CV inputs) will cause Evolution to cover the entire range of poles. GENUS CV1 Input The selection of poles is not a NOTE:...
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Page 14: Species Control
Species setting. for signals far below Consequently, when using the Evolution as an oscillator, the Species control can be used to the cutoff frequency. amplitude modulate the output. If oscillation... -
Page 15: Specifications
9. Specifications Controls Supplied Accessories Initial Frequency 1x 16-pin, Doepfer-style cable Initial Q 4x M3 screws Q Level Compensation 4x M2.5 screws Initial Genus (# of Poles) 4x Nylon washers Initial Species (Distortion Input Level) 1x Quickstart Guide Signal Input 1x 3.5mm mono socket - 100K Impedance Signal Output 1x 3.5mm mono socket - 1K Impedance... -
Page 16: From Dave's Lab: The Evolution Of Evolution
Moog 904A. I also envisioned a DC-coupled Ladder filters self-oscillate, and can be used design with a cutoff frequency range well as VCOs. I was able to design the Rossum beyond 10 octaves, as well as eliminating Electro EVOLUTION’s frequency control... - Page 17 Species the signal is inserted into the Q VCA, this control can be used to amplitude modulate effect is eliminated. In EVOLUTION, the Q the output. If oscillation is combined with an Compensation control allows insertion of...
- Page 18 Q VCA in a measurable effect on circuit performance, manner such that the same Q control but it means that if a Rossum Electro module voltage produces the onset of oscillation for is accidentally plugged in backwards, each pole setting.
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Page 19: Acknowledgements
11. Acknowledgements A number of wonderful people generously provided help, advice, encouragement, and inspiration during the development of Evolution. Many thanks from the Rossum Electro-Music team to: Bob Moog, for his inspiring filter design Jim Aikin Patrick Brede Nancy Enge...
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