SYNTHR SYNTHR4 User manual

Le SYNTHR4
4-channel paraphonic synthesizer with MIDI control,
arpeggiator, built-in sequencer, interactive step
sequencer, modulation matrix memory, dual effects
and stereo output.

SYNTHR4 Manuel V1.06 EN
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SYNTHR4 Manuel V1.06 EN
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User Manual

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TABLE OF CONTENTS
WELCOME _____________________________________________________________________________ 5
CONNECTIONS __________________________________________________________________________ 6
WARNING______________________________________________________________________________ 6
INTRODUCTION _________________________________________________________________________ 6
FIRST VISIT_____________________________________________________________________________________________ 7
MORE DETAILS __________________________________________________________________________ 8
THE SOURCES __________________________________________________________________________________________ 8
MIXER ________________________________________________________________________________________________ 9
FILTers_______________________________________________________________________________________________ 10
MODULATIONS ________________________________________________________________________________________ 11
OUTPUTS_____________________________________________________________________________________________ 13
USE OF THE MIDI CONTROLLER____________________________________________________________ 15
THE PLAY MODES_______________________________________________________________________ 16
MONOPHONIC MODE __________________________________________________________________________________ 16
PARAPHONIC MODE____________________________________________________________________________________ 17
CHORD Mode _________________________________________________________________________________________ 17
ARPEGGIATOR Mode ___________________________________________________________________________________ 18
Step SEQUENCER Mode _________________________________________________________________________________ 19
SEQUENCER MONO Mode _______________________________________________________________________________ 20
SEQUENCER CHORD Mode_______________________________________________________________________________ 21
Mode SONG Mono _____________________________________________________________________________________ 21
SONG Chord Mode _____________________________________________________________________________________ 22
PATCHES______________________________________________________________________________ 22
PARAMETERS __________________________________________________________________________ 23
DIAPASON ____________________________________________________________________________________________ 23
GLOBAL TUNING_______________________________________________________________________________________ 23
Autotune_____________________________________________________________________________________________ 23
BRIGHTNESS __________________________________________________________________________________________ 23
POLYCHAIN ___________________________________________________________________________________________ 23
THEME_______________________________________________________________________________________________ 23
Global SYNTHR4 _______________________________________________________________________________________ 24
Global conf MIDI_______________________________________________________________________________________ 24
SYSEX________________________________________________________________________________________________ 24
ABOUT_______________________________________________________________________________________________ 25
PANIC _______________________________________________________________________________________________ 26
APPENDICES ___________________________________________________________________________ 27
APPENDIX 1 : MIDI KEYBOARD____________________________________________________________________________ 27
APPENDIX 2 : HOW TO change filtEr _______________________________________________________________________ 28
APPENDIX 3 : REAR Face_________________________________________________________________________________ 29
APPENDIX 4 : EXTERIOR MAINTENANCE ____________________________________________________________________ 29
APPENDIX 5 : HARDWARE OPTION ________________________________________________________________________ 29
APPENDIX 6 : FIRMWARE EVOLUTION______________________________________________________________________ 30
PATCHES BOOK _________________________________________________________________________________31

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WELCOME
Thank you for purchasing the SYNTHR4, and thus supporting the French electronic lutherie.
This project follows the SYNTHR3 where I wanted to push the approach by using more modern components offering more
possibilities. Jean Luc LARTIGUE ( oZoe.fr) took the opportunity to push further the ergonomics via a small color screen and
brought a higher power that you will discover along this manual. Yves USSON has been associated to this project for the
programming of the effects.
I would like to thank Laurent Cartaux for his precious help on the SYNTHR4 skin.
And I will finish my thanks for my wife and yes once again who let me have full freedom on long hours of development and
tuning.
I strongly advise you to read this manual at least once if you don't want to have a surprise like not hearing anything on the
way out.
We wish you long hours of research and music for your greatest pleasure.
https:// www.synthr.fr
Rémy WASSELIN
The presets were developed with the use of a SEM filter in channel 1 and an LP 2144 filter in channel 2 by Kurtz Mindfield
and SynthR.
They are there to guide the user who can modify them, save them to a new location. The patches when loaded call the
operating mode with which they were made. You will find some patches that call the arpeggio mode, or paraphonic mode, or
sequencer mode, in which case the corresponding sequence will be loaded as an example. It is quite possible to modify the
sound of a sequence and make another patch out of it.
See the Patches Book at the end.
The demo sequences were developed by Kurtz Mindfield.

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CONNECTIONS
Back :
•Channel 1, Channel 2 outputs: 6.35 line level jack
•CV1, CV3, outputs: corresponding to VCO1 and 3. 3.5mm jack -1V to +7V with master tune at 440Hz or -2V to +6V or
0V to 8V, impedance 1Kohm
•VCA envelope gate, VCF 2 envelope gate, outputs: 3.5mm jack 0-5V impedance 1Kohm
•Clock: 3.5mm jack TTL compatible clock available in Arpeggiator and Sequencer mode, 0-5V, 1Kohm impedance
•USB type B MIDI socket: Processor firmware update and MIDI control by software
•USB type A socket called Host to connect a USB keyboard
•MIDI Polychain Din 5 pins : Used to connect several SYNTHR4 or SYNTHR3 to increase the polyphony. Also allows to
make MIDI Out and to send a MIDI clock.
•Mains socket: IEC - 240 V AC 50Hz only, equipped with a 315mA timed fuse or 500mA fast.
Front :
•MIDI IN Din 5 pins: keyboard or sequencer input
•MIDI THRU Din 5 pins: Repeat of the MIDI IN socket.
Dimensions : 625mm*485mm*225mm
Weight : 14 kg
Power consumption : 40 VA
WARNING
Although you can open the rear panel to change a filter, it is forbidden to intervene on the power supply, as the presence of
electrical voltage can cause risks of electrocution.
Use a standard power cord.
INTRODUCTION
The SYNTHR4 is an analog synthesizer with subtractive synthesis and MIDI controls.
The VCOs of the SYNTHR4 are controlled by a processor that adjusts the frequency on demand: Autotune function.
In a historical modular synthesizer, the patches are realized by cables that link the modules together. For the SYNTHR4, no
cables, but push buttons that connect the modules together. This makes the connections between modules more readable.
These push buttons are digital switches and can therefore be stored in profiles called "Patch".
Although pre-wired, the choice of modulations remains important.
The MIDI control is done through a MIDI to CV and Gate converter which receives a MIDI master keyboard.
To take advantage of the SYNTHR4 this keyboard should have: pitch bend, modulation wheel, aftertouch and velocity and a
sustain pedal.
The MIDI converter can also be controlled by a MAO software.
The Arpeggiator part and the Sequencer part of the SYNTHR4 will be able to receive a MIDI clock and the associated "Synch
24" commands via the DIN socket.

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FIRST VISIT
SYNTHR4 consists of from left to right:
•The oscillator section consists of 4 VCOs. VCOs 1 and 3 are identical as well as VCOs 2 and 4, they will be detailed
later.
•VCOs 1 and 3 each have a SUB oscillator and a Super SAW
•A modulation section with two LFOs, the LFO1 which can be MIDI synchronized and the LFO2 with more possibilities,
both digital with 16 modifiable waveforms including a Sample and Hold and a noise generator. These LFOs can be
frequency modulated by an LFO3.
•A Ring Modulator between the different VCOs.
•A white and pink noise generator.
•An independent portamento on each VCO.
•An effects section acting on each of the 2 output channels.
•An overall MIXER that allows you to send each of the 8 available sources to the VCF1 and/or VCF2.
•Underneath are the controls of a 3rd LFO, partly controlled from the screen.
•At the bottom we find a general volume.
•The filter section with a low-pass or multimode VCF1 and a low-pass or multimode VCF2*.
•Below we find 2 VCAs with automatic panning or not.
•3 envelope generators, one of which is used as a modulation for the VCOs and the LFO1, one for the VCFs and one
for the VCAs.
We have done the tour of the analog part and we arrive on the controller with its graphic screen which will allow us to
control the various modes of play, the MIDI channel if necessary, the Tuning fork, to save "patches" and to activate the
internal Arpeggiator as well as the Sequencers and many other settings. Equipped with seven buttons and a rotary encoder,
this controller allows all possible actions of the synthesizer. It has no effect on the audio synthesis.

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MORE DETAILS
THE SOURCES
The VCOs are based on the SSI2130 circuit of great integration which naturally offers a very good slope of 1V/octave over
several octaves. However, this synthesizer is equipped with an Autotune which allows to keep its accuracy on the tessitura.
VCO1 AND VCO3:
•Octave selector on + or - 2 octaves, by successive presses.
•Fine tuning on + or - 2 semitones to + or - 12 semitones, (configurable in the Settings
menu).
•Keyboard tracking via MIDI to CV including the pitch wheel of + or - 1 tone
(configurable in the Settings menu).
•Adjustment of the SuperSAW *intensity in the SAW. Potentiometer at 0 : Standard
Saw.
•Adjustment of the pulse width (PW) 10 to 90%.
•Frequency modulation by :
•Adjustable input 1: LFO1 or Modulation Envelope or Aftertouch (if the keyboard
delivers it).
•Adjustable input 2 : LFO2 or VCO2 (Cross modulation).
•Pulse Width Modulation (PWM):
•Adjustable input 1: LFO1 or Modulation Envelope.
•Adjustable input 2: LFO2 or VCO2 (Cross modulation)
•Simultaneous outputs possible : Sine, Triangle, Sawtooth, Pulse
* SuperSAW is an addition of original saw plus one saw moving at 0.1 Hz plus second one
animated by LFO2 if On
VCO2 AND VCO4:
▪Octave selector on + or - 2 octaves,
▪Fine tuning on + or - 2 semitones to + or - 12 semitones, (configurable in the Settings menu).
▪Keyboard tracking via MIDI to CV including the pitch wheel of + or - 1 tone (configurable in the Parameters menu).
▪Synchronization of VCO2 on VCO1 and VCO4 on VCO3
▪Adjustment of the pulse width (PW) 10 to 90%.
•Frequency modulation by :
•Adjustable input 1: LFO1 or Modulation Envelope or Aftertouch (if the keyboard delivers it).
•Adjustable input 2 : LFO2 or VCO2 (Cross modulation).
•Pulse Width Modulation (PWM):
•Adjustable input 1: LFO1 or Modulation Envelope.
•Adjustable input 2: LFO2 or VCO2 (Cross modulation)
•Continuously variable output: Triangle, Sawtooth, Pulse that can be controlled by the LFO2 or the modulation
envelope.
To perfect your knowledge of VCOs you can view the tutorial N°1, VCO at: Médias | SynthR or SynthR4 - Tuto 1
: Les VCO - YouTube

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SUB1 AND SUB2 :
•Output at octave -1 of VCO1 and VCO3: Triangle, Sawtooth, Square
•Output at octave -2 of VCO1 and VCO3: Square
NOISE
•White noise
•Pink noise .
RING MODULATOR
•Between VCO1 and VCO2 or VCO4 measurable or between VCO3 and VCO2 or
VCO4.
See tutorial N°3 for this section: Médias | SynthR or SynthR4 - Tuto 3 : Le reste de la façade gauche - YouTube
MIXER
•Each of the above sources can be sent to VCF1 and/or the VCF2.
If no VCF1 or VCF2 destination is engaged, there will be no output sound.
Depending on the game modes chosen, choices will be indicated and sometimes not
modifiable.
After pressing the " SHIFT " key below the screen, the VCF1 and VCF2 assignment buttons
change their role and become note activation buttons of the Step sequencer, as we shall
see later.

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FILTERS
The VCFs are either discrete circuits or integrated circuits (like the AS3320 or the SSI2144) using known schematics, but in no
case will they be clones of the components. It is therefore possible that some people will not find the grain, the fineness, the
harmonic range or even the known defects of these famous filters.
VCF1 AND VCF2:
Suggested choices see Appendix 2.
•Cutoff
•Resonance
•Keyboard tracking 0 to 120%. The 100% is between 8 and 9.
•Dedicated Envelope input
•Adjustable modulation input 1 : LFO1 or LFO2 or VCO1.
•Adjustable modulation input 2 : Aftertouch or Modulation wheel
•Low Pass, Band Pass, High Pass selection for multimodes only
From one filter to another, the cutoff and resonance potentiometers can have different
behaviors, especially at the end of the run.
- When a Low-Pass only filter is inserted the BP and HP buttons are inactive
- For some multimode filters, the mixing of modes is possible, for example LP and HP. This is valid for the so-called
SVF or state variable filters. Other multimode filter will not allow this mixing.

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MODULATIONS
The LFOs are generated by digital ICs for LFO1 and 2. The LFO3 is generated by the controlleur.
LFO1
•Multiplication selector: 6 frequency ranges
▪0,5 from 0,025 to 6,4 Hz
▪1from 0,05 to 12,8 Hz
▪1,5 from 0,075 to 19,2 Hz
▪2from 1 to 25,6 Hz
▪3from 1,5 to 38,4 Hz
▪4 from 2 to 50 Hz
•Frequency potentiometer.
•Waveform distortion potentiometer (see below):
•Waveform selector among 8 and 8 more by pressing "Alt". The last position is a Sample and Hold
•Sync button with the internal clock which can be internal to the controller, the LFO2 or MIDI
•LFO On button: without it no output. The LED indicates the frequency.
•Button for triggering the LFO with the Modulation Wheel. The LED indicates the frequency.
•Buttons for triggering the LFO by the modulation envelope. The LED indicates the frequency
•Button for activating the LFO3 see below (partly controlled from the screen) which modulates the frequency of LFO1
LFO2
•Range selector: 4 frequency ranges
▪1from 0,05 to 12,5 Hz
▪2from 0,1 to 25 Hz
▪3from 0,2 to 50 Hz
▪4from 0,4 to 100 Hz
•Frequency potentiometer
•Waveform distortion potentiometer:
▪Examples :
The position respecting the waveform is at 12 o'clock or
50% otherwise the waveform is distorted. In the case of the
square waveform, this potentiometer acts on the duty cycle
(PW).
•Sample & Hold sample rate potentiometer acting on any
waveform in addition to noise.
Make sure that this potentiometer is set to 0 when you are
not using the S&H, otherwise the LFO will not function
properly.

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•Waveform selector among 8 and 8 more by pressing "Alt».
•LFO On button: without it no output. The LED indicates the frequency.
•Button for triggering the LFO with the Modulation Wheel. The LED shows the frequency only on the action.
•Button for triggering the LFO with the Aftertouch. The LED shows the frequency only on the action.
•Button for triggering the LFO by a keyboard Gate with adjustable delay from 0 to 3 seconds. The LED shows the
frequency only on the action..
LFO3
•Activation by the LFO3 button under the screen. Choice of the waveform by dedicated
menu on the controller : sine, sawtooth, inverted sawtooth, triangle, square, random and
variable.
•Frequency adjustable from 60s to 500Hz.
▪2 frequency ranges on the screen.
•Adjustable level.
This LFO can modulate LFO1 and LFO2 as well as the VCA panning.
To perfect your knowledge of LFOs you can view the tutorial N°2, LFO at: Médias | SynthR or SynthR4 - Tuto 2 :
Les LFO - YouTube
The envelopes are generated by digital integrated circuits associated with other components.
ADSR MODULATION (EG MOD)
•ADSR type envelope generator for frequency or duty cycle modulation of VCOs or
envelope for LFO1 and waveform change on VCO2 and 4.
▪Possibility of delay from 0 to 3 seconds with respect to the keyboard Gate by
the Delay button.
▪The Loop button allows you to repeat the ADSR cycle of the envelope which
becomes an LFO whose frequency depends on the setting of the knobs.
* We will see that this envelope can change its role depending on the game mode (see
below).

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ADSR FILTRE (EG VCF)
•ADSR envelope generator for VCF cutoff frequency modulation.
▪The Inv button is used to invert the envelope which can be interesting for BP or
HP modes.
* A jumper at the back allows either a negative or a positive inverted envelope (by
default) (appendix 6).
▪The Retrigger button allows you to play with each note press to restart the AD
cycle.
▪The Velocity button allows you to play on the amplitude of the whole envelope
according to the velocity supplied by the MIDI keyboard. It is up to the keyboard
to provide the right response curve.
▪The Loop button repeats the ADSR cycle of the envelope.
ADSR VCA (EG VCA)
•ADSR envelope generator for VCA modulation.
▪The Retrigger button allows you to play with each note press to restart the AD
cycle.
▪The Velocity button allows you to play on the amplitude of the whole envelope
according to the velocity provided by the MIDI keyboard. It is up to the
keyboard to provide the right response curve.
▪The Loop button repeats the ADSR cycle of the envelope.
PORTAMENTO OR GLIDE
•The adjustable portamento can be applied to all VCOs.
OUTPUTS
VCAS
Special feature of VCA1: It receives the Tuning Fork when it is activated via the control screen (see below), and in this case
open the gain potentiometer.
The following is valid for the 2 VCAs.
•The gain potentiometer allows you to hear the audio
outside the envelope level. It will therefore generally be set
to 0 except when you want to hear the pitch or make a
drone.
•The LFO2 potentiometer allows an amplitude modulation in
addition to the gain or the envelope.
* A jumper at the back allows you to set this LFO in phase
opposition (by default) or not on each VCA (appendix 6)
•The envelope potentiometer sets the opening level of the
VCA.
•The MIX potentiometer allows you to send the output of the VCA to outputs 1 (left) or 2 (right) of the synthesizer,
to a mixing desk (line level).

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•The Pan Button engages the LFO3 whose waveform will be selected on the controller and will execute an automatic
panning.
To stop the Pan, it is advisable to press the Pan button on the VCAs first and then stop the LFO3 on the control
screen. Otherwise you will not hear anything.
If the Gain and Envelope potentiometers are set to 0, no output. Also do not forget the general volume
potentiometer.
The tutorial N°4 shows the MIXER, VCF, VCA and envelope generator functions. Médias | SynthR or SynthR4 -
Tuto 4 : la façade droite - YouTube
FX
The page of this module will be called from the controller by pressing the FX button.
A long press will turn off the effects. Pressing Back returns to the previous screen but does not turn off the effect.
8 effects with their variants are available independently for each channel.
•Phasing low resonance
•Phasing high resonance
•Chorus low resonance
•Chorus high resonance
•Flanger low resonance
•Flanger high resonance
•Reverb low resonance
•Reverb high resonance
•Shimmer on -1 octave reverb
•Shimmer on +1 octave reverb
•Shimmer on -1 octave echo
•Shimmer on +1 octave echo
•Delay
•Ping Pong Delay or stereo delay.
A Mix setting allows you to dose the Wet / Dry per channel. The dry signal does not pass through the circuit.
The parameter knobs are described on the screen.
Tip: the more audio sources there are in the mixer when using the FX, the more you need to lower their input level in order
not to saturate the effect. A position around 5 on the knobs is often sufficient.
See tutorial #3 for more information.

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USE OF THE MIDI CONTROLLER
Now that you are familiar with the SYNTHR4, its analog part, its possibilities, we will go into the details of the MIDI controller
and its different MENUS.
The MIDI Controller is interfaced around a graphic display, seven illuminated push buttons and a rotary encoder.
After switching on the main screen appears as follows with the 3 main menus.
VARIABLE FUNCTION KEYS
The " Select " key moves the arrow that indicates the current selection
Pressing the encoder (Roll OK) confirms the selection or moves the arrow within a page.
The " Esc " key allows you to go back in the menus or to return to the current game mode.
FIXED FUNCTION KEYS
The " FX " key allows you to call up the effects page at any time and the Esc key, which becomes Back, allows you to exit.
The " LFO3 " key allows you to call up the LFO page at any time and the Esc key which becomes Back allows you to exit.
The " Start, Pause, Stop " key allows you to manage the activation of the sequencers and the songs.
The " Shift, Chord Memory " key allows you to record a chord in CHORD mode, to scroll notes from 1 to 16 (max) on the
MIXER LEDs in Step Sequencer mode and to delete notes in Arpeggio mode.
The " Split " button allows you to modify the current playing mode by pressing it briefly, in order to split the MIDI keyboard
into 2 while remaining on the same channel. The split point is determined by a long press. The LED flashes until a key is
pressed on the keyboard..

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MENU ORGANIZATION
The screen shows 3 main menus: Modes, Patches and Param.
The tutorial N°5 allows you to familiarize yourself with the use of the controller. Médias | SynthR ou SynthR4 -
Tuto 5 : Controller - YouTube
THE PLAY MODES
Depending on the play mode, some buttons are forbidden; don't be surprised if you can't use them, it's a normal operation.
The play modes have priority and are always active in the background. In the main menu.
MONOPHONIC MODE
Select Modes then OK, select Monophonic then OK.
This is the play mode allowing almost any combination:
The VCOs and other sources can be sent to one or the other filter or both at the same time. The sounds produced can be sent
to one or both line outputs.
In this mode there is only one note possible on the keyboard and therefore only one " Gate " which controls the 3 envelopes.
The filter envelope is sent to the 2 VCFs and the VCA envelope to the 2 VCAs. The Modulation envelope is free to use for FM,
PWM, LFO2 destinations.
The VCOS can be synchronized, at different octaves or detuned.....
SUB1 follows VCO1 and SUB2, VCO3

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SPLITTED MONOPHONIC MODE (DUAL MONO)
By pressing the " Split " key, you can get VCO1 and 2, SUB1 on the left side of the keyboard : channel 1. The VCO3 and 4, the
SUB2 on the right part, the channel 2. The RM and the NOISE can be on one or the other channel. We thus obtain a
duophonic bitimbral play (Dual Mono Mode) according to the sending on such or such channel.
The keyboard separation is C4 by default. As indicated this can be changed.
As soon as you SPLIT the keyboard, the modulation envelope becomes the envelope of VCF1, and VCA1, i.e.
channel 1. The filter envelope remains the envelope of VCF2 and the VCA envelope remains the envelope of VCA2,
which constitutes channel 2.
This applies regardless of the play mode that allows split mode.
PARAPHONIC MODE
This mode allows up to 4 notes to be played simultaneously provided that all 4 VCOs are tuned in unison beforehand. The
VCOs can be sent via the MIXER to any channel.
The ADSR settings of the VCA envelope will carry over to the envelope of each note. The other envelopes VCF and
Modulation keep their role. It is possible to act on the initial gain of the VCA as well as on the envelope level. The latter is a
combination of the individual envelopes of each note.
CHORD MODE
This mode, imitated from the KORG Mono/Poly, allows you to play a 4-note chord with the same remark as for the
Paraphonic Mode, that the VCOs are in unison and adjusted in the Mixer.
Pressing the "Chord Memory" key puts the keyboard in standby. You press notes from the keyboard in any order and when
the last note is released the chord is recorded.
The 4 VCOs are sent by default on channel 1. This can be modified by sending on channel 2 or a mix of the two channels.

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CHORD SPLITTED MODE (CHORD 3)
By pressing the "Split" key, we lose the 4th note of the chord to free the VCO4 on the right side of the keyboard. You end up
with a left-hand chord on a note in channel 1 and a right-hand note in channel 2.
ARPEGGIATOR MODE
The arrow is moved by the " Select " key. The arrow indicates the parameter to be adjusted by the central encoder.
Pressing the encoder keeps the arpeggio engaged on the keyboard (HOLD mode). The same action can be performed by a
sustain pedal connected to the keyboard.
All parameters can be modified in real time and saved except the LFO2 clock and MIDI. The clock is by default set to Internal.
PARAMETERS :
•Clock : in BPM modifiable by the encoder from 30 to 300 BPM, followed by a division or multiplication
coefficient : /8, /4, /3, /2, x1, x2, x3, x4, x8.
▪Internal or LFO2 or MIDI clock. For these last 2 cases the modification of the clock frequency is done on
the LFO2 or the MIDI transmitter.
•Type : As played (as played on the keyboard), Order (sorted from lowest to highest), followed by many
modes to test. There are 11 types in total.
•Direction: up, down, up & down, random and brownian (limited random advancement around the pitch)
•Octave : 0 one octave, +1 to +4 or 5 octaves.
•Swing : from +or - x%.
•Gate : + or - y% (gate length)
•VCOs : Each VCO can play like VCO1, example 2=VCO1. But it can also play " Reverse ", with a delay of 2 or 3
or 4 notes, ex : 3=1 Note/2, . a delay of 2 or 3 or 4 notes, ex : 4=Delay 3.
At any time, a long press on the " Select " button displays the current BPM which can be modified by the
encoder.
As long as a note is held, the arpeggio plays and can be modified.
In this mode the audio sources can be sent to channel 1 or channel.
Un appui sur SHIFT permet de supprimer ou activer les notes de l’arpège en cours à concurrence de 16.
ARPEGGIATOR
120 x1 Internal CLK
Type : Order
DIR : up VCOs
Octave : +0 2= VCO1
Swing: 0% 3= VCO1
Gate: 30% 4= VCO1
Select Roll Hold esc

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ARPEGGIATOR SPLITTED MODE
By pressing the "Split" key, VCO3 and VCO4 are released for use on the right side of the keyboard. You end up with a left
hand arpeggio and a right hand duophonic game. Be careful to tune these 2 VCOs in unison.
Reminder: in this mode it is the Modulation envelope that drives channel 1 and the VCF and VCA envelopes that drive
channel 2.
When you like an arpeggio, press the key : and you will find this arpeggio recorded in the Mono
sequencer location 65 under the name " Copy ARP " up to 64 notes. Concerning the VCO2, 3, 4, if the parameters of
the arpeggio do not exist in sequence mode the parameter will become = VCO1.
STEP SEQUENCER MODE
Sequence limited to 16 notes.
In order to allow a more varied play in this mode the VCF and VCA envelope for channel 1 becomes the Modulation
envelope as in the split modes. In order to have channel 1 and channel 2 with different timbres.
This is how the Sequencer Step screen looks before recording and then during recording. The note is displayed while playing
the keyboard, then the next step is waiting.
Above VCF a small bar graph shows the CutOff value of the filter between 0 and 100 which will be recorded with the
note. This allows the playback to make CutOff variations that will be sent via the Kbd Tracking potentiometer under
the CutOff. To try…
Tip: Give a name to your sequences using the EDIT function which will allow you to edit the term FREE into a NAME using the
keyboard that appears. The encoder allows you to move around the keyboard and the select key is enough to choose a letter
and save.
Once saved, the screen becomes the following and finally the play screen:
Press this key to start the sequence LED steady, pause -short press- LED flashing or -stop -long press- LED off.
STEP Seq.
Seq XX EDIT
FREE
RECORD
Select ok=REC. esc
STEP Seq.
Seq XX 12 Steps
NOM
LOAD COPY
Select ok=REC. esc
STEP Seq.
FREE Keys
---
Step : 12 Stop :12
VCF1: 0.0 VCF2: 0.0
Select Roll ok=Save esc
STEP Seq.
120 x1 Internal CLK
NOM
STOP VCOs
DIR: up 2= VCO1
Gate: 20% 3= Delay 2
Transp: 0 4= 1 Note/2
Select Roll back

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All parameters are modifiable in real time.
PARAMÈTERS :
•Clock : in BPM modifiable by the encoder from 30 to 300 BPM, followed by a division or multiplication
coefficient : /8, /4, /3, /2, x1, x2, x3, x4, x8.
•Internal or LFO2 or MIDI clock. For the last 2 cases the modification is done on the LFO2 or the MIDI
transmitter.
•Direction : up, down, up & down, random and brownian (limited random advance around the step)
•Gate : + or - x% (gate length)
•Transp: indicates the number of semitones transposed on the keyboard compared to the recording.
•VCOs : Each VCO can play like VCO1, example 2=VCO1. But it can also play " Reverse ", at the minor third Th-
min, at the major third Th-maj, at the fourth Forth, at the fifth Fifth, at the octave Octave, ... with a delay of 2
or 3 or 4 notes, e.g. :Delay 3.
Parameters are saved in real time when they are modified. When you reload the sequence, they will automatically
be restored in the same way as the notes. If you do not wish to systematically reload the last parameters, you can
set in Parameters, global conf : " Load old Seq's param " to NO.
In this mode the audio sources can be sent to channel 1 or channel 2.
While the sequence is playing, it is possible by pressing this button: to make the "sequence interactive"
in the manner of "old school" sequencers such as the Moog 960. The notes scroll on the buttons of the MIXER,
different actions are then possible:
•A long press on a key stops the sequence on that note. A long press on the key of the last note of the
sequence restores the original sequence.
•A short press on a key skips this note. A new short press restores this note.
•Two or three or four successive presses on a key, allows to put on this note a Ratchet of 2, 3, 4 notes. A
press on this key restores the note.
STEP SEQUENCER SPLITTED MODE
By pressing the "Split" key, you release VCO3 and 4 which are directed to channel 2 to be used on the right side of the
keyboard. We end up with a left hand sequence and a monophonic game with 2 VCOs in the right hand.
SEQUENCER MONO MODE
Sequencer limited to 64 notes and 64 sequences.
In order to allow a more varied play in this mode the VCF and VCA envelope for channel 1 is the Modulation
envelope as in the split modes. This allows you to have channel 1 and channel 2 with different timbres.
The screen pages are presented in the same way as the Step Sequencer but do not allow you to record filter variations.
Instead, you can decide at the time of recording to put an accent on a particular note of channel 2.
At playback, turn ON the VCF and/or VCA velocity buttons. In this case channel 2 using these envelopes will be
played with a velocity of 50% (MIDI value 64) and the accent will be played with a velocity of 100% (MIDI value 127).
Before saving the page shows the following parameters:
•Step : number of steps recorded.
•Duration : ¼ rest, ratchet*4, ratchet*3, ratchet*2, 1/16 sixteenth, 1/8 eighth note, ¼ quarter, ½ half note,
whole.