Presenting our craftsmanship

"The art challenges the technology, and the technology inspires the art." - John Lasseter

Forthcoming products

ComPair

Window/Dual Voltage comparators

This module can be used as a pair of independent voltage comparators or a single window comparator.

Three outputs relay the comparison of the voltage(s) against the threshold levels set with the potentiometers. The Hi pot setting can be offset with a CV; this allows comparing two voltages against each other.

Each logic output is fit with a 3-position switch to signal a range matching, lack of it, or be muted. LEDs help following what's happening.

The combination of modes and settings leads to numerous applications combining logic and analog level detection.

The module works from DC to beyond audio range


Tweakers Plus

Dual CV Gain, Offset, Polarity and Mute

This is a 1U-high companion module that allows fine tuning your modulations.

  • Two channels each offer control over gain and offset.
  • A three-position switch allows muting the channel and inverting the modulation polarity without impacting the offset.
  • Normalizing of the inputs avoids using a multiple when a signal is dispatched to two targets.
  • Normalizing of the outputs offers an bonus mixer, summing the two channels.

The Tweakers is a perfect companion for modules whose modulation inputs lack such amenities. This 1U version presents output LEDs for amplitude and polarity.

Activating predefined settings at the flick of a switch is paramount for live situations. Being able to prepare two sets of carefully adjusted settings for a given signal is even more useful. The Tweakers may come handy as an audio mixer too.


Black modules & panels

After much delay, we are now expanding our range with black panels.
These are made of 2mm-thick brushed aluminium which is bath-anodised on all sides and screen-printed with a high-resistance white-silvery paint.


Modules with black panels

The whole range will be available with black panels.
(to the exception of the 2x4 Multiple)
This is an ongoing process as new batches are manufactured.
The product pages of this site reflect the current availability.


Separate black panels

User-replaceable black panels are planned for the whole range, with the following exceptions:

  • Grainity because of availability from day one in black version
  • Quadigy and Twin Waves for technical reasons that may lead to after-sales issues.
  • 2x4 Multiple as it is mostly black!

Black panels will be available at the same time as the related black modules.


Current products

Grainity

The first Granular VCF in the world

The Grainity brings the unique and never-heard-before concept of granular sound synthesis to VCFs.
With a 100% analog filtering path under digital control, the Grainity expands and enriches the sound in creating subharmonics, tunable harmonies, unison, flanging effects and formant filtering all at once.

The module presents two parallel sections, the granular filter itself and a typical multimode filter, each with its own output plus a 3rd mix output of both sections.

Numerous controls and CV allow a very wide palette of results.


Twin Waves MK II

Dual VCO/LFO/Random

Two independent oscillators with 20 algorithm-based sound synthesis options offer a wide palette of tonal variations or can be switched into highly versatile LFOs.

  • Thick unison, waveshaping, additive, self-sync, noise with resonant VCF, ring modulation, bit-crushing and more; all are ready to enrich your palette.
  • The tuning can be locked, changing the Coarse knob into an octave selector.
  • Each VCO has its own quantizer with 21 different scales.
  • The LFO offers wave shaping too, plus clocking with div/mult and sync capabilities.
  • A semi-modular normalizing opens the realm of cross modulation without additional cables; just twist the pots!
  • With its icons and on-demand scrolling information, the display avoids the need of a cheat sheet. No feature is more than one-level deep accessible.
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Quadigy

Quad programmable envelope generator

The Quadigy is a poweful envelope generator focused on live play.

The goal is to allow the user setting up rich, interactive and dynamically evolving envelopes without the risk of breaking up a subtle and intricate patch once on stage.

Seven-stage envelopes with independent A, D, R curve settings can be saved in presets and recalled by CV or clock to be tweaked further on.
Cycle settings allow LFO-like shapes that can be clock controlled, imposing the tempo to the envelopes with automatic stretching/compressing of the timings to make them fit.

A powerful CV matrix allows modulating every parameter in every envelope with independent amplitude and polarity.


CalTrans

Quad Volt/Octave calibrator & Transposer

The CalTrans solves issues encountered when playing tonal music with a modular system: tracking problems, curves unrelated to V/Oct ratio, limited octave range, cumbersome transposition, ...
The Caltrans corrects and expands the range of troublesome VCOs and brings V/Oct tracking to anything that oscillates including Hz/Volt Korg synths.

Besides calibration, the CalTrans offers live play features.
Each channel can be quantized and any combination of them transposed jointly.
A pair of rotary encoders allow a quick selection of octaves and semitones.
You can add a pinch of portamento and glissando to each channel and save the whole in user presets.

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Tweakers

Dual CV Gain, Offset, Polarity and Mute

The Tweakers is a slim companion module that allows fine tuning your modulations.

  • Two channels each offer control over gain and offset.
  • A three-position switch allows muting the channel and inverting the modulation polarity without impacting the offset.
  • Normalizing of the inputs avoids using a multiple when a signal is dispatched to two targets.
  • Normalizing of the outputs offers an bonus mixer, summing the two channels.

The Tweakers is a perfect companion for modules whose modulation inputs lack such amenities.

Activating predefined settings at the flick of a switch is paramount for live situations. Being able to prepare two sets of carefully adjusted settings for a given signal is even more useful. The Tweakers may come handy as an audio mixer too.

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Mixwitch

Mixer & Clock/CV controlled Switcher

With only a pinch of mixing, inverting and controlled switching, we brew up a plethora of combinations and uses. The user manual presents eighteen use cases.

Two mixers can be used separately or with the 4 channels mixed into one.
Polarity control and muting are under digital control for noise free operation.
When not used for CV, the Log button halves the mixer gain and changes the curve of the pots into logarithmic for precise audio control without clipping.

LEDs indicate each input's polarity, the Log mode and each output's signal amplitude and polarity.

A switching section allows selecting the inputs via CV or clock with cyclic or random order for sequencing fun.


Flexshaper

CV-controlled voltage mapper and waveshaper

The module can act as an envelope-shaping tool, frequency multiplier, waveshaper, clipper, distortion, limiter, curve changer, and more. Five settings + CV inputs offer limitless control over the placement of the voltage points for dynamic signal sculpting.

The idea of the Flexshaper comes from a feature in the Oberheim® Matrix synthesizers called Tracking Generator.
The Flexshaper applies the same concept using the same 5 shaping points. However, it goes beyond Oberheim’s implementation on two main aspects:

  • It goes fast enough to process signals at full audio rate
  • The 5 points are dynamically adjustable (CV) in real-time

Besides, the Flexshaper can process adequately bipolar and unipolar Eurorack signals, even changing one type into the other.

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Two Bits

Dual logic processor with chaining and CV functions

Two dual-input sections can be used independently, put in parallel for 4-input wide logic, or chained for more advanced processing.

Each section presents normal and inverted outputs.
The two sections offer a set of common and specific functions for a total 15 different ones; 30 when counting the inverted resuts (e.g. OR/NOR).

Several functions offer real-time CV control for dynamic change of their condition or setting.
All time-related functions can be independently user-adjusted and are saved automatically.
LEDs tell permanently the status of all outputs.

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Logica XT

Voltage-controlled logic and gate processor

Besides the whole set of mainstream boolean logic, the Logica offers several unique functions based on state-logic, and with 3 inputs + manual control, brings you where other logic modules can't go.

Simultaneous normal and inverted outputs are completed with a div/2 output that expands its usability.

Time-related functions are user-adjutable and stored automatically; pulse lengths and delay duration can be adjusted from milliseconds to several seconds with perfect repeatable precision.

Selecting the functions with a CV brings the entirely new concept of controlled randomness into logic decisions.

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2x4 Multiple

Dual section passive multiple

Elegantly matches the side stripes of Klavis modules, as well as all black setups.

A multiple is a required utility sitting efficiently next to modules whose signals should be dispatched to more than a single destination.

This a passive module that doesn't require a supply connection.

Surprisingly, a multiple could also be used with Klavis logic modules (Logica XT and Two Bits) for additional OR logic.
Indeed, these logic modules allow their outputs to be ORed by simply connecting them together.
With 4 jacks in one section of the multiple, 3 inputs to 1 output and 2 inputs to two destinations are both feasible.
Beware that such direct ORing feature might not be available with other brands of modules!

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NoDrain

Negative to +5V converter

Reclaim your unused watts !
Did you know that typical 5V adapters draw 240% of the actual wattage they deliver, with 140% being wasted as heat ? Moreover they take it from your precious +12V rail.

Beating even other switching-supply adapters, the NoDrain converter takes its power where there is plenty unused: the -12V negative rail !

The NoDrain adapter does its conversion with high efficiency: the current drawn from the 5V adapter requires half as much on the -12V rail.
One full Amp of 5V takes less than 0.5 Amp on the -12V.

With 1 amp available, you can distribute the 5V from the NoDrain to several busboards.

Thanks to ultra-high-speed switching technique there is no noise to be heard.

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Discontinued products

Twin Waves (V1)

Voltage-controlled Dual VCO/LFO

The driving idea behind the Twin waves voltage-controlled dual oscillator/LFO is to offer two interesting oscillators in a skiff-friendly and compact size.

To achieve that challenge, we built the product’s architecture on the concept of pre-defined algorithms, where the most useful configurations and their matching parameter are ready to use.

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Logica Gater

Voltage-controlled logic and gate processor

Logic functions are a longtime ally in the modular toolbox.
In the typical Klavis’ approach, we had to bring something extra to the party.
First, we made the selection of the logic function controllable by a voltage; this way creative dynamics can be put in place.
Secondly, we have our unique Gater function which combines gates in a way no traditional logic function does: it creates as many individual gate triggers on the output jack as are arriving on the various inputs.

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Inspiration technology to let you create the difference
Klavis Modular Systems
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