Noise Engineering Viol Ruina Manual

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Noise Engineering

Viol Ruina

Resonant lowpass ﬁlter and distortion with

internal modulation and envelope following

Overview

Type Distortion/ﬁlter

Size 4HP Eurorack

Depth .8 Inches

Power 2x5 Eurorack

+12 mA 40 mA

-12 mA 35 mA

Viol Ruina is an all-analog distortion and lowpass ﬁlter with an internal envelope follower and self-

modulating cutoﬀ. The four-pole design is reminiscent of the classic ﬁlters we all know but with a

completely new and slightly ridiculous twist. The independently addressable distortion circuit takes

VR into overdriven paradise with a shocking amount of drive. Built-in envelope following makes an

easy way to create dynamic patches with the ﬂick of a switch, and feedback FM takes VR to a

whole new realm of ﬁlthiness. Run a sound through VR, you'll get something cool out of it.

Etymology

Viol -- from Latin violo, violentis: "violate, dishonor, violent" Also viola, "purple"

Ruina -- from Latin: "Destruction"

"Violent purple ruins"

Design Notes

Viol Ruina came into existence as part of the Distortion of the Month series. It all began with a

single epic distortion module that was really more of an experiment many years before. That

module had something like six distortions on it and was really an experiment meant to get a feel

for each individual one. Like so many of our early ideas, we knew we had something, but we just

didn't have time to get to it. It sat.

When we hired Markus, we dusted it oﬀ and handed it to him. He came back to work next all

starry eyed and we were convinced that now was the time to do something...but what exactly we

weren't sure. We told Markus to go home and decide which of the circuits he liked and how and

why. When we sat down to discuss, we designed a load of distortion modules, including VR. It

took a little more work and redesigning to get it to its current state -- the envelope extraction was

a great add, and we ﬁnally had a *gasp* ﬁlter!

It sounded darker and meaner and awesomer than we could have hoped for. Viol Ruina. We're

sorry. You're welcome.

Page 1 “Violent purple ruins” Design Notes Viol Ruina came into existence as part of the Distortion of the Month series. It all began with a single epic distortion module that was really more of an experiment many years before. That module had something like six distortions on it and was really an experiment meant to get a feel for each individual one.
Page 2 CONNECT THOSE TO POWER. Warranty Noise Engineering backs all our products with a product warranty: we guarantee our products to be free from manufacturing defects (materials or workmanship) for one year from the date of the original retail purchase (receipt or invoice required). The cost of shipping to Noise Engineering is paid by the user.
Page 3 Interface Frq: Filter cutoﬀ frequency. Knob sums with the Frq CV input. Viol Ruina Laser: Engages the internal envelope follower at diﬀerent amounts, routed to the cutoﬀ frequency. Down position is oﬀ, middle is mild, high is extreme. Q: Filter resonance. Mod: The audio is routed back to the ﬁlter cutoﬀ...