Klavis Quadigy User manual

Klavis Quadigy user manual V1.4 Page 1of 17
Quadigy Quad Envelope Generator
7-stage envelopes, presets, cycling, morphing & CV matrix
Introduction
The Quadigy is a complex 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. This is achieved by offering two main modes, one where
full control is available, and a Live mode where only the settings that are sensible using on stage
are accessible. The user interface offers an intuitive access for otherwise complex settings.
Advanced features such as automatic time-stretching, multiphase clocking and full morphing
between presets put the Quadigy in a category on its own.
Env 4
CV A G/T 3G/T 2G/T 1
QuadigyQuad Programmable Envelope Generator
G/T 4
Env 2 Env 3Env 1CV B
Klavis
Clock
1 2 3 4
User
RSDA
DL H
EG
CV Matrix
Global
Cycle
Preset U
A
B
Live
Preset/Edit
Features at a glance
Quad 7-stage envelopes
oPre-delay
oHold
oAttack
oPunch
oDecay
oSustain
oRelease
Continuous curve shape settings
Inversion
Independent output level
Cycle capability with auto fit-to-clock
oElastic time stretching
o5 internal clocks with tap tempo
oExternal clock control
oMultiply/divide and offset
oIndividual cycle ext. control
Manual gating for convenient editing
32 presets with naming
External preset control via CV or Trig
Simultaneous 156-point CV matrix
Morphing on presets and CV Matrix
Multi-editing for easy polyphonic uses
Live mode for easier/safer control
Graphical display
Real-time envelope stages LED indication
Current state retained over power cycle
Easy firmware update via an audio file
Skiff-friendly and compact module

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Installation and security
Purpose
This module is meant for installation in a Eurorack-compliant chassis.
It adheres to Eurorack Doepfer mechanical and electrical specifications.
Do not attempt using this module in other mechanical or electrical contexts.
Installation
Before the installation, disconnect the mains power supply from your modular system. Some
power supplies are not safely isolated; there is a risk of injury!
See in the specifications if this module requires 5V from the supply rails. If 5V is needed and your
rack is not providing 5V, do not attempt connection! A Klavis NoDrain adapter can provide the
missing 5V rail.
Check that the current consumption requirements of this module, when added to your installed
set of modules do not exceed the available current from your supply. This is done by adding up
the current draw of all modules (mA) separately for each of 5V, 12V and -12V rails. If any of these 3
sums exceeds the available current of your supply for that voltage, do not connect the module to
your system; you need a stronger power supply.
The provided supply flat cable can only be inserted in the appropriate orientation at the back of
the module, so there is no risk of error on that end. However, you should pay attention to the
orientation of the cable in the socket of the supply PCB inside your chassis. Cheap sockets
without shrouding may allow you to plug in the connector the wrong way!
The red stripe on the cable should match a stripe printed on the supply board. The stripe also
indicates the -12V side. In case there is no stripe, a -12V marking is a safe indication of the
orientation.
Double check that the connectors are fully inserted and correctly oriented before switching on
the power supply. In case of an anomaly, switch off the power supply immediately and check
everything again.

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Firmware update
If needed, the product can be updated by playing an audio file such as “Quadigy_1.00.wav”.
Check on Klavis.com that you have the latest firmware version for your product.
If there is none to be found, there is none needed ;-)
Procedure
Connect a mono or stereo cable between your audio playing device headphone output
and the Quadigy CV A input.
Prepare to play the audio file
Set the play level at two thirds
While pressing the Preset and CV Matrix buttons, switch on your modular case supply
The display provides instructions
Start playing the audio file
If everything goes fine
The display tells “updating”
As the update is progressing, a row is filling up
When the row is full, all green LEDs flash; the firmware is updated successfully
Press any button to restart the module
If the sound level is too low
Stop audio playback
Slightly increase the audio playback level
Start audio playback from the beginning
If there is an error during the playback
The 7 red LEDs will flash and the display will indicate an error.
It is possible that the sound setting was too loud to begin with.
Diminish the sound level drastically and restart the procedure.
Playback error can also be due to various parasitic sound causes:
Touching the cable
Using sound-generating features of your phone or computer
Some power saving feature affecting the audio playback
Surrounding noisy modules, bad electrical grounding or modular supply noise
Check that you have not created a ground loop (e.g. computer used as file player!)

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Panel presentation
Envelope selection
Menus selection
Gate / Trig / Cycle enable
(Signal is cascaded)
Envelope outputs
Real-time stage indication
• DL – Pre Delay
• H – Hold
• A – Attack
• D – Decay
• S – Sustain
• R – Release
Modulation source selection
Assignable knob
Human CV J
External control
Env 4
CV A G/T 3G/T 2G/T 1
QuadigyQuad Programmable Envelope Generator
G/T 4
Env 2 Env 3Env 1CV B
Klavis
Clock
1 2 3 4
User
RSDA
DL H
EG
CV Matrix
Global
Cycle
Preset U
A
B
Live
Preset/Edit
For a quick hands-on discovery, go to the Run-through demo on page 15
Live mode vs Studio mode
Hidden settings
The Quadigy offers many features whose editing is not required or sensible in a live context. In
Live mode some editing pages are hidden or simplified.
Different behavior
Studio mode offers full control on all settings. However, some features can be perturbing while
elaborating the stages of your live set. This is why some features are only active when in Live
mode.
Feature / setting
Studio mode
Live mode
Preset load, save & clear
Full featured
Simpler menu with Load only
External preset control
Editable but disabled
Hidden but enabled
Morphing between presets
Editable but disabled
Editable and enabled
Various advanced parameters
All available
Hidden

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Switching between Studio and Live modes is done by a long press of the Global button. Live
mode is reflected by the Live red LED. An “L” or “S” also appears in the top left corner of the
display.
Note that if you don’t use preset control or morphing you can stay in Studio mode during live
situations. You can also switch from Live mode to Studio mode at any time to save a tweak.
Envelope selection and multi-editing
The 4 buttons + white LED row at the top select the envelopes under editing.
It is allowed to select/edit more than one envelope at once. This is done by maintaining any of the
4 buttons as a shift and adding/removing the others by individual press.
When more than one envelope is selected for editing:
The settings in the display and the 6 stage LEDS reflect the leftmost envelope
Changes are simultaneously applied as absolute values to all envelopes selected
Faders and User knob behavior
Changes are applied after the physical position crosses the current value. This is shown by the
fader’s red LED going solid on.
A current setting of zero is indicated by double pulses (or reverse).
Menus and editing
There are 4 base menus with the CV Matrix button leading to 3 derived menus.
Base menus
When adding the [CV Matrix] button
Preset control
→
CV clearing functions in current preset
EG –Envelope generator settings
→
EG –CV control settings
Cycle related settings
→
Tempo CV control settings
Global settings
- none -
Once in a menu, selecting the pages is done by turning the encoder.
Each menu contains a number of pages, possibly of two types:
1. Fader pages where four settings are controlled by the four faders
2. Parameter/option pages showing a single setting, changed via the encoder:
oPress the encoder to access editing; the Blue Edit LED goes on
oTurn to edit the setting
oPress the encoder to validate the change and exit editing
You can always press another menu button to leave a page/setting you have entered.

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Note that some pages are hidden depending on the context of other settings; for example the
Gate/Trigger mode selection is hidden when the envelope is in cycle mode because that setting is
meaningless in such case.
To protect the settings against user mistakes, there is a timeout that terminates editing after 20
seconds of inactivity.
Manual gate
While in any of the 3 multi-fader pages of the EG menu, pressing the encoder button acts as a
manual gate on the sections currently selected.
CV Matrix
There are 3 sources of modulation that can be freely assigned in amplitude and polarity to any of
the 13 destinations in any of the four envelopes. This gives a modulation matrix where all 156
modulation links can be active simultaneously if you wish so (we think not, but who are we to
judge?).
The 3 sources are CV A, CV B and the User knob acting as CV U.
Assigning a CV modulation
Every page whose setting allows CV control is accessed by pressing the CV Matrix button.
Once the CV Matrix red LED is flashing:
Select a source by holding the CV Matrix button as a shift key and select one of the 3 top
menu buttons for source U, A or B. This is reflected on the screen.
Change the modulation by moving the related fader (fader pages) or entering editing via
the encoder (parameter pages).
Press CV Matrix to exit the CV editing
When CV Matrix is active, pages without CV settings are hidden.
1. Preset menu
Studio mode
Here you can load, save and clear presets.
Pressing any other menu button cancels the current operation.
When saving, the 4 faders allow you naming the preset
Live mode
The only option is load preset which offers direct preset selection.

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2. Preset + CV = Clear CV menu
Studio mode only
Here you can clear the CV modulations for the current preset, separately by source (A, B, U) or
globally for all sources.
3. EG Envelope Generator
This menu offers:
3 Quad-fader pages (with encoder press = manual gate)
oADSR
oAdditional timings: Pre-delay, Hold, Punch, and Global Time
oCurves for A, D, R, and output level
5 Parameter pages
oTrigger mode (Gate/Trigger)
oFull attack (Yes/No)
oTransition (Join/Restart)
oInverted output (Yes/No)
oMorph Time (o –120 seconds)
Envelope stages
Punch
Attack
Decay
Sustain
Release
Gate OR Hold
Pre-Delay
Gate
Hold
Max
Zero
Cycle duration
=
Global time

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Pre-Delay - time
This setting allows delaying the entire envelope as if the gating was coming later. Note however
that the end of gate is not delayed. If the Pre-Delay is longer that the Gate, there is no envelope.
Hold –time
Hold is a virtual gating signal that can extend the actual gate duration. The Hold time begins with
the Attack. If the Gate is longer that the Hold time, Hold is “useless”. When Hold extends the
gating, a further Gate could “extend the Hold”. With regularly time-spaced gates, this may result
in a continuous Sustain-only envelope.
When the Pre-Delay time is longer than the Gate signal, the Hold will be applied after the
incoming Gate is over. This makes the envelope seem to be independent from the Gate!
Attack - time
This is the time the envelope takes to reach its maximum level. If the gate or hold is not long
enough, the maximum level may not be attained. In that case, the envelope goes immediately to
Release from the level currently reached.
Punch - time
If Attack has the time to reach the maximum level, the Punch phase begins. Punch is a hold time
before the Decay begins. The Punch level is always to maximum. If the gate or hold durations are
not long enough, the end of Punch time may not be attained, in which case the envelope goes
immediately to Release.
Decay - time
The Decay is the time needed to go from maximum level to sustain level, after the Punch duration
is over. When Punch is set at zero duration, the Decay follows the Attack.
If Gate or Hold is not long enough for the Decay to reach the sustain level, the envelope goes
immediately into Release.
Sustain - level
The Sustain is the level attained after Attack, Punch and Decay are over IF the gate or Hold is long
enough to go over the end of all these phases.
Release - time
Release is the time needed to go from the current level to zero. The Release occurs immediately
when the Gate and the Hold durations are both over.
Global time
This parameter is a timing factor acting simultaneously on all time parameters of the envelope. It
can be seen as a continuous range setting.

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By default, when Global Time is set to 100%, the duration indicated by another parameter is the
value applied. But, if for example, the attack says 2 seconds, a GT setting of 50% will make the
attack being actually 1 second long.
At mid-fader setting, the GT is 100%. Going down tends towards 0%, going up, to 800%. Therefore,
the longest duration for each envelope stage is 30 seconds x 8 = 4 minutes.
When activating the editing on multiple envelopes and changing the GT, the percentage applied
will be the same, but each envelope resulting timings will be different if their initial values were
not the same.
It might be convenient to set GT according to the kind of envelopes you intend doing. For
example, when doing percussions not exceeding a few seconds, setting the GT at 20% will restrict
the longest stage duration to 6 seconds. This will give you the best control of that maximum
duration over the entire fader length for attack, decay, etc.
Note: When Global Time is at 0%, any envelope is reduced to a pulse !
Output Level
This sets the voltage span of the envelope signal. At maximum, the envelope goes up to 8 Volts.
Note that CV control of this setting offers a virtual VCA on each envelope.
Curve shape
The Attack, Decay and Release can each be shaped individually from logarithmic to exponential
curves via linear when set halfway. The typical analog ‘exponential decay’ curve is obtained with
the setting at around 70%.
Trigger Mode
Envelopes are usually controlled with a gate: their duration is related to the duration of the
incoming gate signal.
Gate
Without hold being active, the end of gate is the start of the release phase; this may occur at any
time, even during the Attack, Punch or Decay phase.
Trigger
When triggered, the whole envelope duration is defined by the addition of each phase: pre-delay,
attack, punch, decay and release. The envelope develops automatically through these phases till
the end.
Without hold (long enough), the release immediately follows the decay. This creates an ADSR
envelope where the sustain level is reached but its duration is zero.
When hold is long enough to go beyond the end of the decay phase, a sustain phase is created.

Klavis Quadigy user manual V1.4 Page 10 of 17
Full Attack (FA) –on/off setting
With FA on, an attack already started will always complete, even if there is no more active gate or
hold. Punch is always included in FA. The Punch phase is included in the Attack phase LED.
When in Trigger mode, the Attack is always full.
Transition –Join / Restart
This setting tells if the attack level takes on from the current envelope level (join), or if it cuts
down the current level in order to start from zero (restart).
Join
Restart
The J/R setting has no effect on the attack duration; only the attack slope will vary as needed.
Invert Output –on/off setting
By default this setting is off. When set to on, the polarity of the envelope is flipped.
Note that the signal remains unipolar positive; there are no negative voltages generated.
Morph Time –duration
This - per preset - setting is only effective if Global Morph Time is set to Off (in Global menu).
For the morphing to be active you should also be in Live mode.
Morphing is the progressive transition of all continuous settings plus all the CV settings of the
current preset to the ones of the preset newly called. The time can be set from zero (instant) to
120 seconds. Morph Time is read from the target preset.
4. EG + CV = Envelope CV control menu
CV control is offered on each setting of the 3 fader pages in the EG menu.
5. Cycle and clock menu
Each envelope can run independently or jointly in cycle mode.
When cycle is active, the Cycle LED blips according to the clock source.

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Clock sources
Each envelope can follow different clock sources:
Clock source
Behavior
Cycle LED blips
None; cycle is off
The envelope follows gates/triggers
none
Internal individual
The envelope uses its dedicated clock
single
Internal global
The envelope shares the global clock
double
External
The envelope follows the external clock
triple
The tempo range of clocks (internal or external) goes from 1 to 300BpM.
Cycle
The metric onto which the envelope develops is a Cycle. When using Global or External clock, a
Cycle is defined by multiplying or dividing that (master) clock.
When using the Individual clock, since there is no (need for) multiply/division, the cycle is equal to
the tempo.
When cycle is active:
The envelope self-loops endlessly. When a preset with Cycle active is called, the envelope
starts at the beginning of its next start point, and then loops
The duration of the envelope is not defined by absolute durations; instead, time settings
of the various phases (A, D, etc.) become percentages of the overall envelope duration.
This is what allows automatic time stretching. If for example, you augment the attack
time, all other duration will be proportionally reduced. This way the whole envelope
development time is unchanged.
All envelope phases develop without relating to a gate signal.
The sustain phase only exists if there is a sufficient Hold time beyond the decay phase.
The Gate signal is not used as a gate; it can be enabled as an on/off switch for cycling (see
Gated cycle)
Subdiv
It may happen that the envelope cycle, while of the appropriate length, does not start at the
right time (in relation to other equipment). This is why there is a Subdiv setting. This subdivision
adjustment is only needed (and thus visible) when an external clock is used and divided.
Offset
Offset positions the envelope start within the cycle. The Cycle is divided in 12 equal steps
according to a musical metric and terminology.
Playing multiple envelopes to a Global or External clock
After division and Subdiv are defined, it might be needed to adjust the position of multiple cycling
envelopes in relation to each other. This is done with the Offset setting.

Klavis Quadigy user manual V1.4 Page 12 of 17
While both Subdiv and Offset move the position of the envelope starting point, they have a
different purpose:
Subdiv repositions the whole group of related envelopes according to their common
clock downbeat (to agree with the external equipment’s start/loop point)
Offset defines the start point of the envelopes amongst themselves.
Filling
A filling of 100% makes the addition of envelope stage durations fit within the duration of one
cycle.
The filling can be reduced so that there is a blank after the envelopes ends, or conversely, be
extended beyond 100% to make consecutive envelopes overlap, and thus being truncated by the
next envelope cycle.
Filling does not change the duration of the cycle, but how much the envelope fills the cycle.
1 cycle 1 cycle
1 cycle 1 cycle
Ext/Global clock
Post-divider cycle (e.g. Div/4) 1 cycle
User defined cycle start (e.g. Subdiv +3)
12 Offset points (auto generated)
Filling = 100% & Offset 0
Filling = 75% & Offset 0
Filling = 117% & Offset 0
Filling = 100% & Offset +1
Filling set to “Env Timing”
Setting the filling lower than 1% enters to the Envelope Timing mode of filling
When set to Env Timing, the way the envelope durations are applied is changed:
There is no more stretching of the envelope phases to fit the cycle
The phase duration settings are applied as shown in milliseconds/seconds whatever the
tempo or tempo change
It is possible to set envelopes that are longer than a cycle
This allows maintaining the overall shape of an envelope when the tempo changes
Tap tempo
Tapping the encoder knob defines the tempo. It can be also be readjusted via the Tempo page.
A new tempo is updated after 3 taps, no more, no less.
Gated cycle
When Gated cycle is On, a gate signal (= enable) must be On for the cycling to occur

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When gate goes On, the envelope starts at the beginning of its next offset point, then
cycles as long as the gate stays on.
When the gate ends, the envelope goes immediately to release phase then stays off
Cycled
Env.
Gate
Gated
Cycle
6. Cycle & Clock + CV = Tempo control
The only CV controllable parameter is the tempo of internal clocks.
7. Global menu
Quad control page
This page is the only one in the Quadigy where the 4 faders are acting on the 4 envelopes.
For each fader/section, the parameter under control depends on the Cycle mode in that section.
Cycle setting in the section
Icon
Parameter on the fader
Off
GT
Global stretch/squeeze
Internal clock
Metronome
Tempo for the section
Internal global clock
Metronome + G
Tempo for all sections in Global clock
External clock
Sweeping clock
Mult/divide clock ratio
QCT fader set halfway corresponds to the original values (100% of the current timings).
Beware that this setting is independent from the Global Time setting in each envelope. Since they
are both percentages, they simply multiply the durations in cascade. (e.g. GT at 50% with QCT at
200% = 100%; Time x 0.5 x 2 = 1).
Preset control
The settings shown here are only available in Studio mode and active only in Live mode.
Calling the presets by external control can be done in two ways: clock/triggers and CV. Preset
control points to a user-defined list of presets part of a continuous range within the 32 available.

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Clock/trigger-based preset control
When preset control = trigger, the CV A input is used to input a trigger signal.
Presets are called sequentially in a loop. It remains possible to select presets manually. This is
useful to “synchronize” the preset selection in relation with the external equipment requests.
CV-based preset control
When preset control = CV-A, presets are called according to a voltage offset.
When CV=zero, the pointed preset is the first preset in the defined range
Every 150mV step up from zero Volts points to the next preset in the defined range
First and Last preset range definition
These settings define the first and last preset in the range accessible by external preset control.
Morph mode page
Defines where the Morph duration will be read from when calling a new preset:
As defined in each preset
Globally for all presets
Global Morph time page
The setting goes from instant (0) to 120 seconds. This setting is useful only when Morph mode is
set to Global
Brightness
This setting affects the LEDs and the display brightness jointly.
Note that the 4 output LED’s brightness is not controlled by this setting.
Screen Saver
To preserve the Quadigy display’s longevity, it switches off automatically after a predefined time.
You can switch between short, mid and long.
Factory Reset page
This page allows clearing the entire module and reinstates the factory demo presets.
Beware that all your presets will be lost!
Version page
This page is displaying the current firmware version.

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Run-trough demo
Discover some features of the Quadigy without relying on any other module.
This demo is available from firmware version 1.14 –Check the version in Global menu.
If you have to upgrade from version 1.13 or lower, you must also perform a Factory reset.
The preset demonstrates the following:
Envelopes 1 and 2 work jointly with different settings (e.g. feeding a VCF and a VCA).
There’s a global control on their timing aspects
Envelope 3 acting as an LFO with wave shaping
Envelope 4 acting as a clock generator with tempo control
The User knob is acting as a “manual” CV that is applied to various parameters for the purpose of
the demonstration.
Let’s retrieve the demonstration preset
Press the [Preset] button; its green LED goes on
Press the encoder and turn it to bring preset 7; then press again to load it.
Manual gating
Press the [EG] (envelope generator) button
Press simultaneously buttons [1] and [2] in the top row; their white LEDs stay lit.
You have access to parallel editing and manual gating of these two envelopes
Every press on the encoder is a manual gate on the selected envelopes
Global timing
Turn the User knob until its red LED goes on; then set it halfway
With the LED on, the knob visual cue is now reflecting its actual setting.
When pressing the encoder and keeping it pressed for various gate durations, one can
see the resulting signals on the green LEDs at outs 1 and 2
Now, try varying the User knob and check its effect by gating the envelopes.
Not only the decay and release times are made shorter or longer depending on the knob
position, but the pre-delay on the second envelope is also affected.
The User knob is a bipolar virtual CV (negative to zero to positive). When halfway (= zero), its
LED shows double off-blips as do the faders when presenting bipolar settings.
This knob and the external CV inputs can modify any combination of settings in any envelope,
each with their own polarity and amplitude.
In this case, the knob controls the global time parameter of the two envelopes. It could have
been sent to any other parameter (curves, attack, hold, out level, etc.) at the same time.
LFO with waveshaping
Set the User knob halfway (double off-blips)

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Press button [3] in the top row to access the settings of the third envelope
The envelope 3 is configured in cycle mode; this is why the blue Cycle LED blips regularly
You can see the Attack and Release green LEDs slowly balancing in equal durations; they
show the up and down phases of the triangle wave that the envelope 3 creates.
To get a perfect triangle, the A and R curves were set to linear.
Turn the encoder twice to the right to see those curves.
Now tweak the User knob and see the resulting curves in the display and the signal on
the output 3 green LED. The knob changes the A & R settings in opposite polarities.
The change in shape is not affecting the tempo.
The knob could have also varied the tempo, the level or created other LFO shapes such as saw,
trapezoid or fancy ones that ordinary LFOs never do J
Clock and pulse generator
Press button [4] in the top row
Envelope 4 is cycled and configured as a full-on/full-off signal generator with instant rise
and fall times and a cycle filling of 50%.
Here the User knob acts on the tempo.
Since you can define the base tempo and the depth of control of the User knob, it is
possible to tailor a rate range that exactly fits your needs.
Note that when A & R are zero as in envelope 4, the shape of the curves is irrelevant.

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Specifications
Mechanical
Dimensions
mm
inches
Eurorack compliance
Height
128.40
5.06
3HE
Width
71.00
2.8
14HP
Depth behind panel (without supply cable)
21.00
0.83
Supply
The supply socket is protected against reverse insertion.
Supply rail
Current draw
+12V
24 mA
-12V
10 mA
+5V
40 mA
Input/output
All inputs and outputs can withstand signals between -12V and +12V without harm.
Jack
Effective voltage range received or generated
Gate/Trigger input
Minimum 1.8V
CV control input
+/- 5V
Clock input
Minimum 2.8V
Outputs
0 to 8V
Packing list
The box contains:
Quadigy module
4x M3 black mounting screws + washers
Eurorack-compliant 16-pin supply cable
Quick setup notice
Klavis products, including PCB and metalwork, are designed and manufactured in Europe.