Ouverture 4C

It is frequently said that the most important stop on any instrument is the ambience. This is because the acoustics of a large reverberant space adds softness and scale to the sound. This is also an essential ingredient to achieve that majestic grandeur that is a signature of the sound of the pipe organ. The Ouverture organ has been specially designed to recreate the magnificence of the acoustics of a large reverberant space in a compact console, so that the organist can replicate the same exhilarating sound experience of a real pipe organ, directly in the living room or study.

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OUVERTURE is an organ with 4 keyboards, complete pedalboard and 68 registers – each of which can select hundreds of organ and orchestra voices. There is also an orchestra register for every section of the organ which can be selected from the numerous options available.

The organ comes with 8 organ styles (4 fixed and 4 programmable) that allow the organist to create and store an infinite number of combinations, either in the 128 internal memory locations or externally via USB memory. The parameter settings are easily accessible through the graphic display on the front panel. The “Tracker Action” style keyboard accurately detects touch by obtaining the speed of actuation of the keys, making it possible to feel a “Tracker Touch” effect, i.e .the correlation between the “touch” of the organist and the transient attack of each virtual pipe.

Developed with the award-winning and patented Physis® physical modelling technology, which reproduces the physical phenomena involved in the sound generation of the pipe organ, the Ouverture is capable of generating the highest-fidelity, most authentic church organ sound.

The Ouverture uses a revolutionary sound system developed by Viscount called RAR (Real Audio Rendering). It is able to simulate multiple sound reflections of the walls, projecting the organist at centre stage and involving them in an unforgettable sound experience – even from their living room or studio.

The majestic console was inspired by the artisanal organ crafting of French builder Cavaille-Coll – one of the most noted pipe organ builders of the 19th century and whose legendary style exemplifies elegance and refinement.

The instrument is equipped with four useful couplers in the sub-octave and super-octave, thanks to which the organist has an abundant variety of timbre combinations, within which the grand Plenum on the 32’ bass and the Concerto di Viole in 16’, 8’ and 4’ on the third manual.

A specific tremulant for the reed stop “Vox Humana” has also been included for expressive and fascinating effects. A dedicated thumb piston for each section allows the organist to play Orchestral sounds chosen from an extensive library. The Ouverture is a beautiful, as well as comfortable organ: the position of all the controls have been carefully studied and the music rack is both height and depth adjustable.



Manuals 4 x 61 keys "Tracker Action" keyboards, with velocity control for MIDI and Orchestra sections
Pedalboard 32 keys straight, straight concave or radiating concave AGO
Stop Controls drawknobs
Internal Amplification 9 Channels, 13 Speakers, 580 W Total (8 x 60 Watt + 1 x 100 Watt)
Expression Pedals 2
Crescendo Pedal Yes


Organ Stops 68
Pedal 12
Great 14
Swell 16
Choir 14
Solo 12
Couplers 10
Tremulants 4, Programmable with independent Depth and Speed for each Organ Division and for Tremulant A and Tremulant B
Total Organ Voices > 460
Total Orchestral Voices >100
Orchestral Voices Stops 5
Styles 4 Preset + 4 editable User Styles. Hundreds Organ Styles can be loaded and/or stored from/to internal memory and Pen Drive
Temperaments 17
Ensemble Adjustable
Air Supply Emulator Adjustable


General Pistons 8
Total General Memories 128: 16*8 Banks
Piston Sequencer Previous, Next, Memory Bank-, Memory Bank+
Return to Handset Registration Yes
Tutti Programmable


Transposer -6/+5 semitones
Automatic Pedal Yes, Programmable as Automatic Piano or Pedal to Manual Mono Coupler
Enclosed Yes, Programmable for each section
Midi Trasmission Enable Yes, Independent for each Organ Section activable with thumb piston
Toe Pistons 12
Reverb 8 different venues emulator
Internal Amp EQ 5 bands digital Graphic EQ
MIDI Sequencer Interactive sequencer with Overdubbing function
Remote Control optional
Keyboard Inversion Yes, Fully customizable
Organ Setup lock With Password
ON/OFF switch Key


Line Outputs 4+1
Output Volume Control Adjustable, for each output
Voices Output Routing Programmable for each voices
Output EQ 5 bands digital Graphic EQ for each output


MIDI Interface In, Out and Thru
Stereo Headphone Output Yes
Stereo Aux Input Yes
Mic Input With rotative Gain Control
USB for Pen Drive Yes
USB for PC Yes


Cabinet Wooden Moldings
Music Rack Wooden lighted
Bench With Music Storage shelf
Dimensions (WxHxD) cm 188 x 137,5 x 119,7 / 74,01" x 54,13" x 47,12"
Dimensions without pedalboard (WxHxD) cm 188,0 x 137,5 x 78,6/ 74.01” x 54.13” x 30,94”
Colours and Finishes Light oak real wood veneer, Medium oak real wood veneer, Dark oak real wood veneer
Weight Kg 224 / Lbs 493,8




The registers are activated through elegant wood stops which have been placed laterally for the most precise and ergonomic result: every level corresponds to a solo division of the organ for which the selection of the registers is simple and intuitive.

A rich selection of Orchestra voices is easily and quickly activated through dedicated pistons. Within the various controls, you will find tremolo specific for the register and “Voix Humaine”, which allows you to set very specific effects.

OUVERTURE has been well thought out so every organist will have an accurate study of the position of controls, with everything comfortable and easy to see both above and below.

The graphic display is well situated in a sliding drawer which maintains the classic aesthetic of the instrument.



“Tracker Touch” style keyboard 

Knowing the importance of the classic-organ keyboard, we have taken the utmost care in selecting the absolute best components. The mechanics of the keys gives the impression of a true “Tracker Action”, by obtaining the speed of actuation of the keys – making it possible to feel the “Tracker Touch” effect. i.e. the correlation between the “touch” of the organist and the transient attack of each virtual pipe.  The keyboard is not only comfortable and consistent to play, but also dynamically sensitive, which is useful for the MIDI and Orchestral sounds – but also essential to provide the “Tracker Touch” effect.



Powered by Physis®

The OUVERTURE sets a milestone in the reproduction of the classic organ sound as it effectively combines the unique RAR (Real Audio Rendering) and Physis® technologies, both developed by the Viscount Research & Development department. Physis® is a technology based on the creation of complex mathematical algorithms capable of simulating the physical and acoustical phenomena underlying the generation of sound in the pipe organ. It is a completely different approach from common digital sound sampling because every single note, every chord, every slightest nuance of the performance is not the result of a simple “playback” of a sound but it stems from a sound generation process which operates fluidly in real time, just as it occurs organically and naturally in a physical instrument. The modelling algorithms that make Physis® organs so unique is the result of a monumental amount of work that now allows the creation of innovative and versatile instruments, redefining the state of the art.



Amplification RAR (Real Audio Rendering)

The detailed parameterization given by Physical Modelling, combined with the careful and lengthy work of components integration, has made the sound from the different speakers extremely natural. The result is a warm and enveloping sound, as well as detailed and transparent. You are clearly able to hear the individual stops even after the instrument has been built up to full organ. In this latter challenge, the innovative front speakers play a primary role. The high sound quality and the precisely calculated position allow them to add significant detail to the sound of the organ, highlighting the dynamic evolution of each individual rank’s timbre. The Viscount RAR (Real Audio Rendering) technology represents a significant step forward in terms of definition, spatiality and body of the sound, which is the most authentic way yet to create that magical effect of the most important organ stop – ‘the ambience’. Sitting at the console of the Ouverture, you will experience the most realistic impression of the instrument and its setting, available from any digital organ you may care to play. We have devoted special attention to the amplification system, in order to faithfully reproduce the impressive dynamics, the wide sound spectrum, and all the amazing spaciousness of the pipe organ sound. In addition to the traditional amplification, we placed two pairs of full-range speakers at strategic points on the console: one pair on the outside panels and one pair on the top stop jamb panel. In this way, as the sound comes from different positions, it is possible to simulate the multiple reflections of the walls, ceiling and floor of a large reverberant space. The effect is quite startling. You will experience a difference just as significant as that achieved when you add a surround sound system to your home television.



Complete Connections

A complete selection of external connections is smartly situated. In addition to Standard connections (MIDI In, Out, Thru; Headphones, stereo inputs), there is a microphone with gain control, 4 external multiple outs + Sub – with the option to expand these to 12+1(Sub). There are also USB host and Device connections. For the USB Host connection, it is possible to use a thumb drive to save and upload sound settings. For the USB Device connection, you can connect to a PC to personalize all aspects of the organ. With the Optional “Physis Editor” for PC, you can modify every single register for every single note – including volume, pitch, spatial arrangement – and many other parameters.



2 Expression Pedals and Crescendo pedal

2 expression pedals provide a fluid and precise movement – allowing complete control of the volume for Manual I, the volume for Manual III, and the CRESCENDO – programmable up to 16 levels.


Introduction to Physis Voicing Flexibility

Modifying a Voicing Style

Physis Voicing Parameters

Tuning Options for Physis Organs

Advanced Tuning, Winding and Touch

Introduction to Audio System Setup

Using External Audio

Physis Technology - Behind the Scenes - part 1 - [HD]

Physis Technology - Behind the Scenes - part 2 - [HD]

Physis Technology - Behind the Scenes - part 3 - [HD]



“Physis-The Editor” is an excellent software tool for Physis Organs editing.
It allows the finest finishing and personalization like stop by se, or a DEMO version of the software package.
Who is interested in purchasing “Physis – The Editor” may request information (costs, how to get it) by sending an email to: organs@viscount.it or info@physisorgans.com

Editor Version    O.S. Version

1.7.1         1.6.0 – 1.12.3
1.8.1         1.13.0 – 1.13.3
1.9.0        1.13.4
1.10.1                              1.14.0 – 1.14.5
1.10.2          1.14.6– 1.14.15
1.11.0           1.14.16 – and above


O.S. Current Release: 1.14.18

Before installing, please read carefully the update guide. WARNING: To install the currente release you must have already installed the 1.3.0 release or above. For assistance with the update package, contact customer service at service@viscount.it

Notice: After the .ZIP file has been downloaded, extract the update .PHY file and copy it to the main folder (root) of a USB flash drive.




Soubasse 32′

Contrebasse 16′

Soubasse 16′

Grande Quinte 10 2/3′

Octave 8′

Bourdon 8′

Flûte 4′

Téorbe III rgs

Contra Bombarde 32′

Bombarde 16′

Trompette 8′

Clairon 4′


Quintaton 16′

Principal 8′

Flûte à Cheminée 8′

Salicional 8′

Prestant 4′

Flûte Ouverte 4′

Doublette 2′

Nasard 2 2/3′

Tierce 1 3/5′

Larigot 1 1/3′

Plein-jeu V rgs

Douçaine 16′

Cromorne 8′

Trompette 8′

Grand Orgue

Montre 16′

Montre 8′

Flûte Harmonique 8′

Bourdon 8′

Gambe 8′

Prestant 4′

Doublette 2′

Quinte 2 2/3′

Cornet V rgs

Fourniture IV rgs

Cymbale IV rgs

Bombarde 16′

Trompette 8′

Clairon 4′


Buordon 16′

Diapason 8′

Cor de Nuit 8′

Viole de Gambe 8′

Voix Céleste 8′

Octave 4′

Flûte Octaviante 4′

Octavin 2′

Nasard 2 2/3′

Carillon III rgs

Progress. Harmonique II-IV rgs

Basson 16′

Trompette Harmonique 8′

Basson Hautbois 8′

Vox Humaine 8′

Clairon Harmonique 4′


Flûte Majeure 8′

Flûte d’ Orchestre 4′

Nasard Harmonique 2 2/3′

Octavin 2′

Tierce harmonique 1 3/5′

Septième Harmonique 1 1/7′

Piccolo Harmonique 1′

Aliquot IV rgs

Acuta IV rgs

Régale en Chamade 16′

Trompette en Chamade 8′

Clairon en Chamade 8′

OUVERTURE 468 FR – Alternative Voices.pdf

OUVERTURE 468 FR – Styles.pdf