SPAT Spatial MC device
SPAT Spatial MC (MC for "multichannel") is a multichannel spatial audio processor that
proposes a convincing localization of a stereo sound source in a 2D or 3D virtual or realauditory space, and includes a high quality virtual room processor.

The device can feed sound systems with up to 32 satellite speakers, and allows to selecta speakers con guration among a collection of presets corresponding to most popularspeakers setups, from simple quadriphonia to standard 5.1 or 7.1, up to more complex
Dolby Atmos-compatible setups. The sound source's position and radiation can begraphically manipulated in a oating panner window, which interacts with navigational
coordinate parameters such as azimuth, distance and elevation.
The localization of the sound source can be optimized according to the type of input
sound - from solo instrument to eld recording - thanks to di erent panning techniquessuch as "VBAP" (for "Vector Based Amplitude Panning"), "KNN" (for "K Nearest
Neighbour") and "HOA" (for "High Order Ambisonics"). The control interface allows to
specify the desired e ect - like the quality of the virtual room, and how the source
interacts with the room - using perceptual terms rather than technical terms. The arti cialroom e ect can be controlled in terms of independent perceptual attributes derived frompsychoacoustic research carried out at IRCAM.

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Structure of the user interface

The user interface is divided in three main sections:
Source & Room controls:

Speakers & Panner section:

Output & (foldable) Routing
sections:

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Source & Room controls are organized in ve panels, whose view can be selected using
the tab on the left:
The Source tab lets you
control the perceptual
description of the acoustic
quality of the source, its
localization, orientation,
directivity and radiation.
Settings controlling features
such as panning type,attenuation law and simulation of air absorption can also be adjusted.
Parameters:- "Azimuth" sets the angle (in degrees) of the sound source, measured toward thevertical axis, with 0° in front of the listener. This parameter can be graphicallymanipulated in the Panner window.

- "Distance" sets the apparent distance (in meters) of the sound source. When the soundsource moves away from the listener, its energy decreases, according to the following
attenuation law: the energy of the source is reduced by the value of the Drop parameter(default: 6dB) when the distance of the source is multiplied by 2. Maximum energy isreached when the source gets to the value of the Radius parameter (default: 1m). Thisparameter can be graphically manipulated in the Panner window.

- "Doppler" ("D" button) enables/disables a Doppler e ect on the sound source. Doppler
e ect may be described as frequencies of a moving sound source shifting according to
the variation of distance over time between the source and the listener.

- "Elevation" sets the elevation angle (in degrees) of the sound source. Elevation is 0°
within XY plane, +90° on top, -90° bottom. This parameter can be graphicallymanipulated in the Panner window.

- "Orientation" sets the apparent orientation (in degrees) of the sound source,
reproduced by spectral corrections of the direct sound. Variations of orientation area ected by the Aperture (directivity) parameter. This parameter can be graphicallymanipulated in the Panner window.

- "Aperture" sets the apparent radiation or directivity (in degrees) of the sound source,
reproduced by spectral corrections of the direct sound. As the aperture decreases, thedirectivity of the sound source increases, a ecting variations of the Orientation
parameter. This parameter can be graphically manipulated in the Panner window.

- "Width" sets the width (in degrees) of the stereo image formed by the direct and earlyroom e ect sounds, which rotate together according to Azimuth and Elevation.

- "Spread" sets the amount of blurring (in percent) applied to the panning of the soundsource. As the value is increased, the localization of the sound source decreases
accordingly. The spreading law slightly di ers depending on the selected panning type.

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- "Pan Rev" sets the amount (inpercent) of directionality of"cluster" re ections. While
early re ections are panned
together with the direct sound,cluster re ections are initiallydi use, and the late reverb ispanned dead center.
Increasing the value of Pan
Rev results in a more directive
global room e ect.

- "Panning" lets you select the desired panning technique:• "Angular", or "vector-based" amplitude panning is recommended for precise
localization of the sound source. Read more about VBAP panning• "Nearest", or "K nearest neighbour" panning is recommended for situations where
no particular sweet spot is required. Read more about KNN panning• "Ambisonics", or "high order ambisonics" panning is recommended for betterstability of the sound scene. Read more about Ambisonics panning
Note: The device performs a short fade-in/fade-out when the panning is changed, inorder to avoid unwanted audio clicks or drops.

- "Air" enables/disables absorption ltering, which produces a frequency-cut simulating
absorption of air, where high frequencies roll-o quicker than low-frequencies
according to distance.

- "Air Freq" sets the roll-o frequency for air absorption ltering (in Herz).
- "Radius" sets the radius (in meters) of a virtual spheric "safety area" surrounding thelistener. When the sound source comes closer to the listener, its energy progressively
increases. When the source reaches the “radius sphere”, its energy no longer
increases. It is clipped. The “radius” parameter hence represents the minimum radiusbelow which the sound level is limited.

- "Drop Mode" sets the type of attenuation (linear or logarithmic) set by the Dropparameter, which represents the slope of the attenuation law applied on the soundsource according to distance setting.

- "Drop" represents the slope (in deciBels) of the attenuation law applied on the soundsource according to distance setting. A 6dB drop means that the energy of the sourceis reduced by 6dB when the distance of the source is doubled. A logarithmic 6dB
attenuation law corresponds to a natural attenuation law in free- eld conditions.
Utility
Pressing the "R" ("Reset") button resets all parameters in this section to their default
value.

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The Fact tab ("Fact" for perceptual
factors) lets you adjust parametersdescribing the acoustic quality in termsof mutually independent perceptual
factors.
These perceptual factors are derived
from psychoacoustic research on thecharacterization of the acoustic qualityof concert halls. As a result of thesestudies, each perceptual factor is related to a measurable objective criterion.
This allows to reproduce the acoustic quality of an existing room, and the interaction of
the sound source with the room. The perceptual factors are manipulated by means ofsliders which are scaled to account for the average sensitivity of listeners with respect tothe di erent factors.
The rst 3 factors are perceived as characteristics of the source:"Source Presence" sets the energy of direct sound and early room e ect at a given
distance. It is inter-connected with the Distance parameter. Therefore this parameter can't
be automated, as the interaction with Distance would end up in an in nite loop ofinteractive levelling.
"Warmth" sets the variation of early sound at low frequencies.
"Brilliance" sets the variation of early sound at high frequencies.
The next 3 factors are perceptually associated to the room:"Room Presence" sets the energy of later re ections (cluster) and reverberation.
"Envelopment" sets the energy of early room e ect relative to direct sound.
"Running Reverberance" sets the early sound's decay time. The term “reverberance”
refers to the sensation that sounds are prolonged by the room reverberation. Latereverberance (in the Room tab) di ers from Running Reverberance by the fact that it isessentially perceived during interruptions of the message radiated by the source. Running
Reverberance, on the contrary, remains perceived during continuous music.
The di erent stages of the room e ect can be enabled or disabled for further soundresults:- "Direct" enables/disables the direct sound.
- "Early"enables/disables early re ections.
- "Cluster enables/disables later and di use re ections.
- "Reverb" enables/disables the reverberation sound.

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Time structure of the room e ect
The response of the Room module
is divided into four time sections:- direct : The direct sound is taken
as the time reference (0 ms) for
the description of the arti cialroom e ect that follows it.

- early : This section contains the discrete early re ections, shared between the twosides signals of Room. The date and intensity of each re ection can be controlledindividually.

- cluster: This section contains a denser pattern of di use later re ections which areequally shared between the surround signals.

- reverb: This section contains the late di use reverberation, divided into uncorrelated
signals of equal energy sent to the surround outputs. The late reverberation decays
exponentially with time according to the decay settings.

The Room tab lets you adjust thesettings that de ne the reverberator.

- The decay time control sets the
exponential decay rate of the latereverberation as a function of
frequency. The decay time ismeasured in seconds and de ned
as the time it takes for the latereverberation to drop 60 dB below
its initial level, after an interruption of the input signal. The decay time is controlled in
the same way as an equalizer curve, either globally or in three separate frequency
bands with controllable transition frequencies, and can be varied from 0.1s to 10s.

- "Room Size" sets the size of the room (in cubic meters). As the value is increased, earlyand cluster (di use) re ections get spread over time.

- "O set" shifts the times (in milliseconds) of early, cluster and reverb re ections.
- "Early Shape" sets the distribution of the gains of early re ections. At low values, earlier
re ections are louder than later re ections. At high values, later re ections are louder
than earlier re ections.

- "Reverberance" sets the global reverberation decay time at mid-frequencies. The term
“reverberance” refers to the sensation that sounds are prolonged by the room
reverberation.

- the "In nite" switch enables/disables (quasi) in nite reverberation e ect.

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- "Heaviness" sets the relative reverberation decay time at low frequencies.
- "Liveness" sets the relative reverberation decay time at high frequencies.
- "Freq Low" sets the low/mid reverberation crossover frequency (in Herz).
- "Freq High" sets the mid/high reverberation crossover frequency (in Herz).
- the "HD" switch, when engaged, doubles the number of internal channels of thearti cial reverberator. This generates a denser reverb tail - i.e. more natural sounding
reverb - at the expense of a higher CPU load. Engaging HD may be useful especiallywhen dealing with a very long reverberation time or with very percussive sound.
Note: The device performs a short fade-in/fade-out when HD is changed, in order toavoid unwanted audio clicks or drops.

- "Air" enables/disables absorption ltering, which produces a frequency-cut simulating
absorption of air, where high frequencies roll-o quicker than low-frequencies
according to distance.

- "Air Freq" sets the roll-o frequency for air absorption ltering (in Herz).
- "Zoom": sets the zooming factor of the reverberator view.

Utilities- pressing the "R" ("Reset") button resets all parameters in this section to their default
value.

- pressing the "C" ("Copy") button copies all Room parameters values, to be pasted intoanother instance of the device.

- pressing the "P" ("Paste") button pastes a copy of Room parameters from anotherinstance of the device.

- pressing the "S" ("Send") button sends all Room parameters values to any instance ofthe device present in the Live set.

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Spectral equalizers
All spectral corrections are performed with the same signal module. This is a "double
shelving lter" which allows to boost or cut three frequency bands separately and control
the high and low transition frequencies. The ltering module is made of a second-orderrecursive lter with a particular method of computing the coe cients, in order to achieve
symmetrical boost and cut curves (on a dB scale), as well as symmetrical response
curves on a log frequency scale.

The Axis tab lets you adjust the spectrum image of the "axis" - or direct - sound,independently from the spectrum image of the reverberator. The "Axis" signal contains
the average acoustic information scattered by the source in the direction of the listener.

- "Low" sets the gain of low frequencies (in deciBels).
- "Mid" sets the gain of mid
frequencies (in deciBels).

- "High" sets the gain of highfrequencies (in deciBels).

- "Freq Low" sets the low/midcrossover frequency (in Herz).

- "Freq High" sets the mid/highcrossover frequency (in Herz).

- "Gain" sets the global energy (in deciBels) of the direct sound.
- the "B" ("Bypass") switch temporarily bypasses the ltering e ect.
- the "M" ("Mute") switch temporarily disables the direct sound.

Utility
Pressing the "R" ("Reset") button resets all parameters in this section to their default
value.

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The Omni tab lets you adjust the spectrum image of the "omni" sound - or global roome ect -, independently from the spectrum image of the direct sound. The ltering isapplied to the global reverberation sound. The "Omni" signal contains the average
acoustic information scattered by the source in all directions.

- "Low" sets the gain of low
frequencies (in deciBels).

- "Mid" sets the gain of mid
frequencies (in deciBels).

- "High" sets the gain of highfrequencies (in deciBels).

- "Freq Low" sets the low/midcrossover frequency (in Herz).

- "Freq High" sets the mid/high crossover frequency (in Herz).
- "Gain" sets the global energy (in deciBels) of the room sound.
- the "B" ("Bypass") switch temporarily bypasses the ltering e ect.
- the "M" ("Mute") switch temporarily disables the room sound.

Utility
Pressing the "R" ("Reset") button resets all parameters in this section to their default
value.

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The Speakers panel lets you select a speakers con guration
among a collection of presets corresponding to most popular
setups, from simple quadriphonia to more complex 3D Dolby
Atmos-compatible setups.
This section also lets you open a Panner window, from which
the sound source can be displayed and easily manipulated
within the speakers setup.
The "Speakers" menu lest you select a speaker setup amonga collection of classic multichannel con gurations. The
device performs a short fade-in/fade-out when the setup ischanged, in order to avoid unwanted audio clicks or drops.
The "Panner" button opens the Panner
window. In the Panner window, select &drag the icon representing the soundsource to set its position within the virtual
room. Use a trackpad (with 2 ngers) or themouse-wheel to control these settings:• drag to zoom in and out• alt-drag source to adjust orientation• cmd-drag source to adjust aperture• shift-drag source to adjust elevation
The Panner window can be freely resized
for a more comfortable display.
"Radius" adjusts the global distance (inmeters) between the listener and the
speakers. By default, Radius is set to 2 meters.
"Align", when engaged, performs a gain and delay compensation of speaker channels,
when all speakers are not equally distant from the listener position. The Align parameteris especially useful when a Custom con guration is in use (please see below).
"Layout" toggles the Panner layout between top ("Single") and top+front ("Dual") views.
Top+front is only available with speaker con gurations that have elevation.
"Floating" enables/disables the "always-on-top" option for the Panner window.
"Labels" enables/disables the display of speakers labels.
"VUs" enables/disables the display of speakers VU-meters in the panner window.
Disabling VU-meters may spare a little CPU consumption.
"Zoom" adjusts the zooming factor.

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Utilities
It's possible to de ne the speakers con guration only once - i.e. in one instance of thedevice - and share that con guration with other instances of the device.

- pressing the "C" ("Copy") button copies the speakers con guration and the Radiusvalue, to be pasted into another instance of the device.

- pressing the "P" ("Paste") button pastes a copy of speakers con guration and of theRadius value from another instance of the device.

- pressing the "S" ("Send") button sends the speakers con guration and the Radiusvalue to any instance of the device present in the Live set.

- pressing the white "R" ("Reset") button resets all parameters in this section to theirdefault value.

About the Custom preset
In case the standard presets do not correspond to your needs, or
do not re ect the room in which you are working (studio, room...),
you have the possibility to build your own loudspeaker
con guration. This is achieved using the SPAT Speaker Editor
device.
The SPAT Speaker Editor device is a utility that allows thecustomization of standard speaker con gurations and the creationof new con gurations. This device does not produce sound but
can be inserted at any time on any track of a Live session. It canbe used to easily share speaker setups with SPAT Spatial™, SPAT
Room™, and SPAT Multiverb™ devices in a single live session.
The speaker con guration you edit or create from the SPAT
Speaker Editor device is stored in the custom preset slot, which
can then be freely selected like any other standard preset.
Please read the SPAT Speaker Editor Documentation document tolearn how to use the device.

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The Output panel lets you adjust the output
master level and monitor the audio outputs of thedevice, which can produce multichannel audio up
to 32 channels.

- "Volume" adjusts the output gain (in deciBels)- the "L" ("Limiter") switch enables/disables
output level limiting. In some cases wherestrong limiting occurs - with, for instance, very
long & dense reverberation - the output signal may become distorted at some point.
In such case, you may want to disable the limiter and lower
the output volume.

- the "VUs" switch enables/disables VU-meters.
Disabling VU-meters may spare a little CPU consumption.

- the "Routing" tool toggles the display of the output routing
panel.

The Routing panel lets you route audio stereo outputs fromthe device to the desired output, either direct outputs (DACs)
or other Live tracks - just as you would route the output of regular Live tracks.
The panel has two views, A for channels from 1 to 16, and B for channels from 17 to 32.
Note that it's possible to route audio channels only as stereo pairs. So when working witha central speaker ("C") - such as in a 5.1 con guration - the device outputs a mono signal
to the third channel, and leaves the fourth channel
empty.
This also means that, in such situation like 5.1,
7.1 con gurations, the LFE channel is not fed by
the device. This rather is left to the user, or to thebass management of the monitoring system, if
any.
It's possible to de ne the output routing only
once - i.e. in one instance of the device - andshare that routing with other instances of thedevice.

- pressing the "C" ("Copy") button copies the routing, to be pasted into another instanceof the device.

- pressing the "P" ("Paste") button pastes a copy of the routing from another instance ofthe device.

- pressing the "S" ("Send") button sends the routing to any instance of the device
present in the Live set.

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SPAT Room MC device
SPAT Room MC (MC for "multichannel") is a multichannel virtual room processor that
proposes a convincing reverberation e ect in a 2D or 3D virtual or real auditory space.
It can be used just like a classic reverberator - typically available from an auxiliary Return
track, for a global room effect applied to a mix.
The device can feed sound systems with up to 32 satellite speakers, and lets you select aspeakers con guration among a collection of pre-de ned presets corresponding to mostpopular speakers setups, from simple quadriphonia to standard 5.1 or 7.1, up to more
complex 3D Dolby Atmos-compatible setups like 7.1.4.

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Structure of the user interface

The user interface is divided in three main sections:
Room editor andMixing controls:

Speakers section:

Output & (foldable)
Routing sections:Page 14 of 32

Time structure of the room e ect
The response of the Room module
is divided into four time sections:- direct : The direct sound is taken
as the time reference (0 ms) for
the description of the arti cialroom e ect that follows it.

- early : This section contains the discrete early re ections, shared between the twosides signals of Room. The delay time and intensity of each re ection can be controlledindividually.

- cluster: This section contains a denser pattern of di use later re ections which areequally shared between the surround signals.

- reverb: This section contains the late di use reverberation, divided into uncorrelated
signals of equal energy sent to the surround outputs. The late reverberation decays
exponentially with time according to the decay settings.

The Mixing panel lets you enable/disable and adjust therespective levels of the di erent stages of the reverberator.
Note that the direct sound is handled by the Dry/Wet dial in the
Output section.
Utility
Pressing the "R" ("Reset") button resets all parameters in thissection to their default value.

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The Room tab lets you adjust thesettings that de ne the reverberator.
The decay time control sets the
exponential decay rate of the latereverberation as a function of
frequency. The decay time ismeasured in seconds and de ned as
the time it takes for the latereverberation to drop 60 dB below its
initial level, after an interruption of the input signal. The decay time is controlled in thesame way as an equalizer curve, either globally or in three separate frequency bands with
controllable transition frequencies, and can be varied from 0.5s to 30s.

- "Room Size" sets the size of the room (in cubic meters). As the value is increased, earlyand cluster (di use) re ections get spread over time.

- "O set" shifts the times (in milliseconds) of early, cluster and reverb re ections..
- "Decay time" sets the global reverberation decay time.
- the "In nite" switch enables/disables (quasi) in nite reverberation e ect.
- "Low" sets the relative reverberation decay time at low frequencies.
- "Mid" sets the relative reverberation decay time at mid frequencies.
- "High" sets the relative reverberation decay time at high frequencies.
- "Freq Low" sets the low/mid reverberation crossover frequency (in Herz).
- "Freq High" sets the mid/high reverberation crossover frequency (in Herz).
- the "HD" switch, when engaged, doubles the number of internal channels of thearti cial reverberator. This generates a denser reverb tail - i.e. more natural sounding
reverb - at the expense of a higher CPU load. Engaging HD may be useful especiallywhen dealing with a very long reverberation time or with very percussive sound.
Note: The device performs a short fade-in/fade-out when HD is changed, in order toavoid unwanted audio clicks or drops.

- "Air" enables/disables absorption ltering, which produces a frequency-cut simulating
absorption of air, where high frequencies roll-o quicker than low-frequencies
according to distance.

- "Air Freq" sets the roll-o frequency for air absorption ltering (in Herz).
- "Zoom": sets the zooming factor of the reverberator view.

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Utilities- pressing the "R" ("Reset") button resets all parameters in this section to their default
value.

- pressing the "C" ("Copy") button copies all Room parameters values, to be pasted intoanother instance of the device.

- pressing the "P" ("Paste") button pastes a copy of Room parameters from anotherinstance of the device.

- pressing the "S" ("Send") button sends all Room parameters values to any instance ofthe device present in the Live set.

Spectral equalizers
All spectral corrections are performed with the same signal module. This is a "double
shelving lter" which allows to boost or cut three frequency bands separately and control
the high and low transition frequencies. The ltering module is made of a second-orderrecursive lter with a particular method of computing the coe cients, in order to achieve
symmetrical boost and cut curves (on a dB scale), as well as symmetrical response
curves on a log frequency scale.

The Early tab lets you adjust the spectrum image of the early re ections.

- "Low" sets the gain of low frequencies (in deciBels).
- "Mid" sets the gain of mid frequencies (in deciBels).
- "High" sets the gain of high frequencies (in deciBels).
- "Freq Low" sets the low/mid crossover frequency (inHerz).

- "Freq High" sets the mid/high crossover frequency (in Herz).
- the "B" ("Bypass") switch temporarily bypasses the ltering e ect.
Utility:pressing the "R" ("Reset") button resets all parameters in this section to their default
value.

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The Cluster tab lets you adjust the spectrum image of the cluster (di use) re ections.

- "Low" sets the gain of low frequencies (in deciBels).
- "Mid" sets the gain of mid frequencies (in deciBels).
- "High" sets the gain of high frequencies (in deciBels).
- "Freq Low" sets the low/mid crossover frequency (inHerz).

- "Freq High" sets the mid/high crossover frequency (in Herz).
- the "B" ("Bypass") switch temporarily bypasses the ltering e ect.
Utilitypressing the "R" ("Reset") button resets all parameters in this section to their default
value.

The Reverb tab lets you adjust the spectrum image of the late reverberation.

- "Low" sets the gain of low frequencies (in deciBels).
- "Mid" sets the gain of mid frequencies (in deciBels).
- "High" sets the gain of high frequencies (in deciBels).
- "Freq Low" sets the low/mid crossover frequency (inHerz).

- "Freq High" sets the mid/high crossover frequency (in Herz).
- the "B" ("Bypass") switch temporarily bypasses the ltering e ect.
Utilitypressing the "R" ("Reset") button resets all parameters in this section to their default
value.

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The Speakers panel lets you select a speakers
con guration among a collection of presets
corresponding to most popular setups, from
simple quadriphonia to more complex 3D Dolby
Atmos-compatible setups.

- the "Speakers" menu selects a speaker setup
among a collection of classic multichannel
con gurations. The device performs a shortfade-in/fade-out when the setup is changed,in order to avoid unwanted audio clicks ordrops.

- "Layout" toggles the display's layout between Top and Front views.
- "Display" toggles the speakers and speakers-labels views.
- "VUs" enables/disables the display of speakers VU-meters in the panner window.
Disabling VU-meters may spare a little CPU consumption.

- "Align", when engaged, performs a gain and delay compensation of speaker channels,
when all speakers are not equally distant from the listener position. The Align parameteris especially useful when a Custom con guration is in use (please see below).

About the Custom preset
In case the standard presets do not correspond to your needs, or
do not re ect the room in which you are working (studio, room...),
you have the possibility to build your own loudspeaker
con guration. This is achieved using the SPAT Speaker Editor
device.
The SPAT Speaker Editor device is a utility that allows thecustomization of standard speaker con gurations and the creationof new con gurations. This device does not produce sound but canbe inserted at any time on any track of a Live session. It can beused to easily share speaker setups with SPAT Spatial™, SPAT
Room™, and SPAT Multiverb™
devices in a single live session.
The speaker con guration you
edit or create from the SPAT
Speaker Editor device is stored in
the custom preset slot, which canthen be freely selected like anyother standard preset.
Please read the SPAT Speaker
Editor Documentation document
to learn how to use the device.

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Page 19 of 32

The Output panel lets you adjust the output master level andmonitor the audio outputs of the device, which can produce
multichannel audio up to 32 channels.

- "Volume" adjusts the output gain (in deciBels)- the "L" ("Limiter") switch enables/disables output level
limiting. In some cases where strong limiting occurs - with,for instance, very long & dense reverberation - the output
signal may become distorted at some point.
In such case, you may want to disable the limiter and lower
the output volume.

- the "VUs" switch enables/disables VU-meters.
Disabling VU-meters may spare a little CPU consumption.

- the "Routing" tool toggles the display of the output routing
panel.

The Routing panel lets you route audio stereo outputs fromthe device to the desired output, either direct outputs (DACs)
or other Live tracks - just as you would route the output ofregular Live tracks.
The panel has two views, A for channels from 1 to16, and B for channels from 17 to 32.
Note that it's possible to route audio channels only
as stereo pairs. So when working with a central
speaker ("C") - such as in a 5.1 con guration - thedevice outputs a mono signal to the third channel,
and leaves the fourth channel empty.
This also means that, in such situation like 5.1, 7.1
con gurations, the LFE channel is not fed by the device. This rather is left to the user, orto the bass management of the monitoring system, if any.
It's possible to de ne the output routing only once - i.e. in one instance of the device and share that routing with other instances of the device.

- pressing the "C" ("Copy") button copies the routing, to be pasted into another instanceof the device.

- pressing the "P" ("Paste") button pastes a copy of the routing from another instance ofthe device.

- pressing the "S" ("Send") button sends the routing to any instance of the device
present in the Live set.

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SPAT Multiverb MC
SPAT Multiverb MC (MC for "multichannel") is a multi-band version of the virtual room
processor that powers the SPAT Spatial MC and SPAT Room MC devices. The maindifference with the SPAT Room MC device is the possibility to adjust the reverberation
decay time using up to 30 frequency bands separately, thus allowing the design of custom
reverberation sounds.
The device can feed sound systems with up to 32 satellite speakers, and lets you select aspeakers con guration among a collection of presets corresponding to most popularspeakers setups, from simple quadriphonia to standard 5.1 or 7.1, up to 3D Dolby Atmoscompatible setups like 7.1.4.
The device can be used just like a classic reverberator - typically available from an
auxiliary Return track, for a global spatial room effect applied to a mix.

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Structure of the user interface

The user interface is divided in three main sections:
Room editor andMixing controls:

Speakers section:

Output & (foldable)
Routing sections:Page 22 of 32

Time structure of the room e ect
The response of the Room module
is divided into four time sections:- direct : The direct sound is taken
as the time reference (0 ms) for
the description of the arti cialroom e ect that follows it.

- early : This section contains the discrete early re ections, shared between the twosides signals of Room. The delay time and intensity of each re ection can be controlledindividually.

- cluster: This section contains a denser pattern of di use later re ections which areequally shared between the surround signals.

- reverb: This section contains the late di use reverberation, divided into uncorrelated
signals of equal energy sent to the surround outputs. The late reverberation decays
exponentially with time according to the decay settings.

The Mixing panel lets you enable/disable and adjust therespective levels of the di erent stages of the reverberator.
Note that the direct sound is handled by the Dry/Wet dial in the
Output section.
Utility
Pressing the "R" ("Reset") button resets all parameters in thissection to their default value.

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The Room tab lets you adjust thesettings that de ne the reverberator.
The Decay Time control sets theaverage exponential decay rate of
the global late reverberation as afunction of frequency.
The Relative Decay Times panel lets
you draw relative decays for several frequency bands. The number of bands is de ned by
the Bands parameter. Holding the shift key while drawing lets you adjust the value of one
single band. Note that the device performs a short fade-in/fade-out when the Bands
parameter is changed, in order to avoid unwanted audio clicks or drops.
A relative decay time corresponds to the global decay time when the slider is set at its
middle position. Dragging the slider left will decrease the decay time, and dragging theslider right will increase the decay time up to two times the global decay time.
Using the rightmost tab allows to set the sliders values all at once:- the downward arrow sorts sliders up to down
- the upward arrow sorts sliders down to up- the horizontal arrow sets all sliders to the global decay time value (mid position)- the colored star triggers random values- the transparent star triggers minimum or maximum values randomly
The Slope parameter lets you expand or compress the actual slider values exponentially.

The Early/Reverb switch toggles theRelative Decay Times view to the
Early & Cluster Delays view:- "Room Size" sets the size of theroom (in cubic meters). As thevalue is increased, early andcluster (di use) re ections get
spread over time.

- "O set" shifts the times (inmilliseconds) of early, cluster and reverb re ections..

- "Air" enables/disables absorption ltering, which produces a frequency-cut simulating
absorption of air, where high frequencies roll-o quicker than low-frequencies
according to distance.

- "Air Freq" sets the roll-o frequency for air absorption ltering (in Herz).

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Utilities- pressing the "R" ("Reset") button resets all parameters in this section to their default
value.

- pressing the "C" ("Copy") button copies all Room parameters values, to be pasted intoanother instance of the device.

- pressing the "P" ("Paste") button pastes a copy of Room parameters from anotherinstance of the device.

- pressing the "S" ("Send") button sends all Room parameters values to any instance ofthe device present in the Live set.

Spectral equalizers
All spectral corrections are performed with the same signal module. This is a "double
shelving lter" which allows to boost or cut three frequency bands separately and control
the high and low transition frequencies. The ltering module is made of a second-orderrecursive lter with a particular method of computing the coe cients, in order to achieve
symmetrical boost and cut curves (on a dB scale), as well as symmetrical response
curves on a log frequency scale.

The Early tab lets you adjust the spectrum image of the early re ections.

- "Low" sets the gain of low frequencies (in deciBels).
- "Mid" sets the gain of mid frequencies (in deciBels).
- "High" sets the gain of high frequencies (in deciBels).
- "Freq Low" sets the low/mid crossover frequency (inHerz).

- "Freq High" sets the mid/high crossover frequency (in Herz).
- the "B" ("Bypass") switch temporarily bypasses the ltering e ect.
Utilitypressing the "R" ("Reset") button resets all parameters in this section to their default
value.

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The Cluster tab lets you adjust the spectrum image of the cluster (di use) re ections.

- "Low" sets the gain of low frequencies (in deciBels).
- "Mid" sets the gain of mid frequencies (in deciBels).
- "High" sets the gain of high frequencies (in deciBels).
- "Freq Low" sets the low/mid crossover frequency (inHerz).

- "Freq High" sets the mid/high crossover frequency (in Herz).
- the "B" ("Bypass") switch temporarily bypasses the ltering e ect.
Utilitypressing the "R" ("Reset") button resets all parameters in this section to their default
value.

The Reverb tab lets you adjust the spectrum image of the late reverberation.

- "Low" sets the gain of low frequencies (in deciBels).
- "Mid" sets the gain of mid frequencies (in deciBels).
- "High" sets the gain of high frequencies (in deciBels).
- "Freq Low" sets the low/mid crossover frequency (inHerz).

- "Freq High" sets the mid/high crossover frequency (in Herz).
- the "B" ("Bypass") switch temporarily bypasses the ltering e ect.
Utilitypressing the "R" ("Reset") button resets all parameters in this section to their default
value.

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The Speakers panel lets you select a speakers
con guration among a collection of presets
corresponding to most popular setups, from
simple quadriphonia to more complex 3D Dolby
Atmos-compatible setups.

- the "Speakers" menu selects a speaker setup
among a collection of classic multichannel
con gurations. The device performs a shortfade-in/fade-out when the setup is changed,in order to avoid unwanted audio clicks ordrops.

- "Layout" toggles the display's layout between Top and Front views.
- "Display" toggles the speakers and speakers-labels views.
- "VUs" enables/disables the display of speakers VU-meters in the panner window.
Disabling VU-meters may spare a little CPU consumption.

- "Align", when engaged, performs a gain and delay compensation of speaker channels,
when all speakers are not equally distant from the listener position. The Align parameteris especially useful when a Custom con guration is in use (please see below).

About the Custom preset
In case the standard presets do not correspond to your needs, or
do not re ect the room in which you are working (studio, room...),
you have the possibility to build your own loudspeaker
con guration. This is achieved using the SPAT Speaker Editor
device.
The SPAT Speaker Editor device is a utility that allows thecustomization of standard speaker con gurations and the creationof new con gurations. This device does not produce sound but canbe inserted at any time on any track of a Live session. It can beused to easily share speaker setups with SPAT Spatial™, SPAT
Room™, and SPAT Multiverb™
devices in a single live session.
The speaker con guration you
edit or create from the SPAT
Speaker Editor device is stored in
the custom preset slot, which canthen be freely selected like anyother standard preset.
Please read the SPAT Speaker
Editor Documentation document
to learn how to use the device.

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The Output panel lets you adjust the output master level andmonitor the audio outputs of the device, which can produce
multichannel audio up to 32 channels.

- "Volume" adjusts the output gain (in deciBels)- the "L" ("Limiter") switch enables/disables output level
limiting. In some cases where strong limiting occurs - with,for instance, very long & dense reverberation - the output
signal may become distorted at some point.
In such case, you may want to disable the limiter and lower
the output volume.

- the "VUs" switch enables/disables VU-meters.
Disabling VU-meters may spare a little CPU consumption.

- the "Routing" tool toggles the display of the output routing
panel.

The Routing panel lets you route audio stereo outputs fromthe device to the desired output, either direct outputs (DACs)
or other Live tracks - just as you would route the output ofregular Live tracks.
The panel has two views, A for channels from 1 to16, and B for channels from 17 to 32.
Note that it's possible to route audio channels only
as stereo pairs. So when working with a central
speaker ("C") - such as in a 5.1 con guration - thedevice outputs a mono signal to the third channel,
and leaves the fourth channel empty.
This also means that, in such situation like 5.1, 7.1
con gurations, the LFE channel is not fed by the device. This rather is left to the user, orto the bass management of the monitoring system, if any.
It's possible to de ne the output routing only once - i.e. in one instance of the device and share that routing with other instances of the device.

- pressing the "C" ("Copy") button copies the routing, to be pasted into another instanceof the device.

- pressing the "P" ("Paste") button pastes a copy of the routing from another instance ofthe device.

- pressing the "S" ("Send") button sends the routing to any instance of the device
present in the Live set.

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SPAT Speaker Editor device
The SPAT Speaker Editor device is a utility that allows thecustomization of standard speaker con gurations and thecreation of new con gurations. This device does not produce
sound but can be inserted at any time on any track of a Livesession. It can be used to easily share speaker setups with the
SPAT Spatial MC, SPAT Room MC and SPAT Multiverb MC
devices in a same Live session.

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- the Speakers menu lets you select a speakers con guration
among a collection of presets corresponding to most popular setups,
from simple quadriphonia to more complex 3D Dolby Atmoscompatible setups.

- the "LFE Chan." menu lets you
select wether and where adummy LFE channel is inserted
in the speaker con guration.
This is useful when a central
speaker is used - typically insetups like 5.1 or 7.1. As Livelets you route audio only as
stereo pairs, if a "Center" monochannel is used, it is sometimes
easier to insert an empty
channel to form and route a "C/
LFE" stereo pair. LFE channel in 5.1 or 7.1 setups is often set tochannel 4. Setting the value to 0 removes the dummy channel.
Note that SPAT devices don't provide integrated bass
management.

- Clicking the "Editor" button opens the Speaker Editor window.
- "Floating" enables/disables the "always-on-top" option for the
Editor window.

- "Cartesian" toggles the grid type from polar to cartesian display.
- "Sp. Size" lets you resize the speakers icons- "Zoom" adjusts the zooming factor.
- the "Share" button sends the current speaker con guration to all
instances of SPAT Spatial MC, SPAT Room MC and SPAT
Multiverb MC devices present in the Live set, into their "Custom"
speakers preset slot.

- the "Read" button opens a dialog box from which you can select a(compatible) textual speaker con guration le that was previously
exported- the "Write" button opens a dialog box from which you can export
the current speaker con guration as a readable text le.

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The Editor window lets you
customize the speaker
con guration that is selected,
before sending it to the SPAT MC
devices present in the Livesession.
The upper panel displays the
positions of the speakers, both inpolar (azimuth, elevation,
distance) and cartesian (x, y andz) modes.
The two lower panels display the
speakers positions from both top
and front views.

Move a speaker inthe lower panel toquickly adjust its
position.

Re ne the position byentering values in theupper panel.
Notice that, if speakers are not equidistant from the listener
position, gain and delay adjustments for each speaker are
calculated accordingly. These settings can be integrated in the
SPAT Spatial MC, SPAT Room MC and SPAT Multiverb MC
devices, if their Align setting is enabled in the Speakers pane.
This can be useful for more accurate panning and soundimage.

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Once the con guration is ready, click the "Share" button to send it to all present instancesof SPAT MC devices.
For instance, a "7ch" circular con guration which was edited to form a rectangularcon guration:... would result as this Custom con guration in all present SPAT MC devices:

Notice that in the present case, time and gain alignement are required, since all speakers
are not equidistant from the listener position. Also notice that a dummy "LFE" channel
was inserted in output channel 4, in order to form a stereo pair with the central channel
and facilitate the (stereo) output routing:

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