Arturia REV LX-24 User manual

USER MANUAL
_REV LX-24

Special Thanks
DIRECTION
Frédéric Brun Kevin Molcard
PROJECT MANAGEMENT
Alexandre Adam Samuel Limier
PRODUCT MANAGEMENT
François Barrillon Callum Magill Clément Bastiat
DIGITAL SIGNAL PROCESSING
Fanny Roche (lead) Marius Lasfargue Jari Kleimola
DSP LIBRARIES
Samuel Limier (lead)
Marc Antigny
Kevin Arcas
Yann Bourdin
Hugo Caracalla
Andrea Coppola
Mauro De Bari
Alessandro De Cecco
Loris De Marco
Geoffrey Gormond
Rasmus Kürstein
Marius Lasfargue
Fanny Roche
SOFTWARE
Christophe Luong (lead) Pauline Alexandre Raynald Dantigny
SOFTWARE LIBRARIES
Pierre-Lin Laneyrie (lead)
Alexandre Adam
Stéphane Albanese
Pauline Alexandre
Baptiste Aubry
Yann Burrer
Corentin Comte
Raynald Dantigny
Pascal Douillard
Samuel Lemaire
Cyril Lépinette
Christophe Luong
Pierre Mazurier
Fabien Meyrat
Mathieu Nocenti
Marie Pauli
Patrick Perea
DESIGN
Callum Magill (lead)
François Barrillon
Clément Bastiat
Maxence Berthiot
Ulf Ekelöf
Morgan Perrier
SOUND DESIGN
Lily Jordy (lead)
10 Phantom Rooms
GoodbyeCalev
Krikor Kouchian
Wheeliemix
Chuck Zwicky
QUALITY ASSURANCE
Aurélien Mortha (lead)
Arnaud Barbier
Matthieu Bosshardt
Bastien Hervieux
Germain Marzin
Nicolas Naudin
Roger Schumann
Nicolas Stermann
Adrien Soyer
Enrique Vela
Julien Viannenc

BETA TESTERS
Bastiaan Barth (Solidtrax)
Marco Correia
Raphaël Cuevas
Tony Flying Squirrel
Andrew Henderson
Mat Herbert
Neil Hester
Jay Janssen
Andrew Macaulay
Terry Marsden
Gary Morgan
Paolo Negri
Davide Puxeddu
Mateo Relief vs MISTERX5
Fernando Manuel
Rodrigues
MANUAL
Jason Jervis (Author) Jimmy Michon
IN-APP TUTORIAL
Gustavo Bravetti
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Information contained in this manual is subject to change without notice and does not
represent a commitment on the part of Arturia. The software described in this manual is
provided under the terms of a license agreement or non-disclosure agreement. The software
license agreement specifies the terms and conditions for its lawful use. No part of this
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registered trademarks of their respective owners.
Product version: 1.0.0
Revision date: 4 April 2023

Special Messages
This manual covers how to use Rev LX-24, provides a comprehensive look at its features,
and details how to download and activate it. First, some important messages:
Specifications Subject to Change:
The information contained in this manual is correct at the time of printing. However, Arturia
reserves the right to change or modify any of the specifications or features without notice
or obligation.
IMPORTANT:
The software, when used in combination with an amplifier, headphones or speakers, may
be able to produce sound levels that could cause permanent hearing loss. DO NOT operate
for long periods of time at a high volume or at a level that is uncomfortable.
If you encounter any hearing loss or ringing in your ears, please consult an audiologist.
NOTICE:
Service charges incurred due to lack of knowledge relating to how a function or a feature
works (when the software is operating as designed) are not covered by the manufacturer’s
warranty, and are therefore the owner's responsibility. Please study this manual carefully
and consult your dealer before requesting additional support.

Congratulations on your purchase of Rev LX-24.
Excellence is placed at the heart of every Arturia product, and Rev LX-24 is no exception.
Explore the presets, tweak a few controls, get lost in the features - dive as deeply as you like.
Be sure to visit the www.arturia.com website for information on all our other inspiring
hardware and software instruments, effects, MIDI controllers, and more. They have become
indispensable tools for many visionary artists around the globe.
Musically yours,
The Arturia team

Table Of Contents
1. Welcome to Rev LX-24!............................................................................................................................................. 3
1.1. The Lexicon 224: a little introduction ......................................................................................................................... 3
1.1.1. Those amazing algorithms ...................................................................................................................................................................................... 4
1.2. Rev LX-24 Feature Summary ........................................................................................................................................ 4
1.2.1. Expanded features: ...................................................................................................................................................................................................... 5
2. Activation and Getting Started............................................................................................................................ 6
2.1. Compatibility ............................................................................................................................................................................ 6
2.2. Download and Install ........................................................................................................................................................ 6
2.2.1. Arturia Software Center (ASC)............................................................................................................................................................................. 6
2.3. Working with Rev LX-24 as a plug-in...................................................................................................................... 7
3. Main Panel ........................................................................................................................................................................ 8
3.1. Navigation and Control...................................................................................................................................................... 8
3.1.1. Display, buttons, and faders.................................................................................................................................................................................. 8
3.1.2. Fine Adjustments .......................................................................................................................................................................................................... 9
3.1.3. Parameter Name Display ....................................................................................................................................................................................... 9
3.1.4. Double Click for Default ........................................................................................................................................................................................... 9
3.2. Reverb algorithms ............................................................................................................................................................ 10
3.3. Algorithm programs.......................................................................................................................................................... 11
3.4. Buttons....................................................................................................................................................................................... 12
3.5. Faders ........................................................................................................................................................................................ 13
4. Advanced Panel .......................................................................................................................................................... 14
4.1. Overview ................................................................................................................................................................................... 14
4.2. Top Ribbon .............................................................................................................................................................................. 14
4.3. Visual Display ....................................................................................................................................................................... 15
4.4. Lower Ribbon........................................................................................................................................................................ 16
4.4.1. INPUT ................................................................................................................................................................................................................................. 16
4.4.2. Dynamic Effects......................................................................................................................................................................................................... 16
4.4.3. Master ................................................................................................................................................................................................................................ 17
5. User Interface .............................................................................................................................................................. 18
5.1. Upper Toolbar......................................................................................................................................................................... 19
5.1.1. Main Menu........................................................................................................................................................................................................................ 19
5.1.1.1. New Preset ....................................................................................................................................................................................................................................................................................................................... 19
5.1.1.2. Save Preset..................................................................................................................................................................................................................................................................................................................... 19
5.1.1.3. Save Preset As........................................................................................................................................................................................................................................................................................................... 20
5.1.1.4. Import... .......................................................................................................................................................................................................................................................................................................................... 20
5.1.1.5. Export............................................................................................................................................................................................................................................................................................................................... 20
5.1.1.6. Resize Window............................................................................................................................................................................................................................................................................................................ 21
5.1.1.7. Tutorials ........................................................................................................................................................................................................................................................................................................................... 22
5.1.1.8. Help .................................................................................................................................................................................................................................................................................................................................... 22
5.1.1.9. About................................................................................................................................................................................................................................................................................................................................. 22
5.1.2. Preset Browser Access and Name Pane................................................................................................................................................... 23
5.1.3. A/B Settings and Copy........................................................................................................................................................................................... 24
5.1.4. Advanced Button........................................................................................................................................................................................................ 25
5.2. The Lower Toolbar............................................................................................................................................................ 25
5.2.1. Control Description................................................................................................................................................................................................... 25
5.2.2. Lower Toolbar Functions..................................................................................................................................................................................... 25
5.2.2.1. Routing Main/Alternative .................................................................................................................................................................................................................................................................................... 25
5.2.2.2. Bypass ........................................................................................................................................................................................................................................................................................................................... 26
5.2.3. Undo, Redo, and History...................................................................................................................................................................................... 26
5.2.3.1. Undo................................................................................................................................................................................................................................................................................................................................. 26
5.2.3.2. Redo ................................................................................................................................................................................................................................................................................................................................ 26
5.2.3.3. History............................................................................................................................................................................................................................................................................................................................ 26
5.2.3.4. CPU Meter .................................................................................................................................................................................................................................................................................................................... 27
5.2.3.5. Panic ................................................................................................................................................................................................................................................................................................................................ 27
6. Selecting Presets ....................................................................................................................................................... 28
6.1. Preset Name Pane............................................................................................................................................................. 28
6.1.1. The Arrows...................................................................................................................................................................................................................... 28
6.1.2. Quick Browser............................................................................................................................................................................................................. 29
6.2. The Preset Browser......................................................................................................................................................... 30
6.3. Searching Presets ............................................................................................................................................................ 30

6.3.1. Using Tags as a Filter .............................................................................................................................................................................................. 31
6.3.1.1. Types.................................................................................................................................................................................................................................................................................................................................. 31
6.3.1.2. Styles ............................................................................................................................................................................................................................................................................................................................... 32
6.3.2. Banks................................................................................................................................................................................................................................ 33
6.4. The Results Pane ............................................................................................................................................................... 34
6.4.1. Sorting Presets............................................................................................................................................................................................................ 35
6.4.2. Liking Presets.............................................................................................................................................................................................................. 35
6.4.3. Featured Factory Presets.................................................................................................................................................................................... 36
6.4.4. Shuffle Button ............................................................................................................................................................................................................. 36
6.5. Preset Info Section ........................................................................................................................................................... 37
6.5.1. Preset Info Quick Menu......................................................................................................................................................................................... 39
6.5.2. Edit Style ....................................................................................................................................................................................................................... 40
6.5.3. Editing Info for Multiple Presets...................................................................................................................................................................... 41
7. Software License Agreement............................................................................................................................ 42

1. WELCOME TO REV LX-24!
Thank you for purchasing Rev LX-24. This audio effect plug-in for VST2, VST3, Audio Unit,
and AAX formats has been painstakingly modelled to bring you an accurate software
version of the legendary Lexicon 224 Digital Reverb.
This plug-in faithfully models the original 224 reverb with a few useful modifications and
expanded features. The Advanced Panel adds a visual representation of your sound source,
allowing you to see how the controls affect the reverb, in a very modern way. For example,
whilst seeing your sound source represented you will be able to better set the split point for
the low frequency crossover.
With everything from the classic Chamber to Concert Hall you will recognize these sounds
from so many recordings over the years. Retain the original character with all its early
digital grit and artefacts or achieve a modern clean and polished sound!
Rev LX-24 is a simple yet powerful representation of one of the most iconic digital reverbs
in history.
1.1. The Lexicon 224: a little introduction
Launched to the world at the 1978 AES Show, the Lexicon 224 may not have been the first
digital reverb, but it was to become one of the most popular studio reverbs in History. The
reverb was conceived by Dr David Griesinger, a Nuclear Physicist, who in his undergraduate
years at Harvard, worked as a classical recording engineer. His understanding of the
importance of room acoustics in recordings, drove him to formulate a digital reverb. This
would eventually become the Lexicon 224.
The system comprised of a 4U Rack mounted brain and desktop controller, whose sliders
and buttons meant easy access to parameters and presets! The LARC (Lexicon
Alphanumeric Remote Control) can be seen littering the consoles of many famous studios
throughout this time and beyond. Notably Peter Gabriel, Vangelis, Brian Eno and every 80s
Producer worth their salt! This device not only helped define the drum sound of the 80s but
also gave us some deeply luscious spatial effects to help create dreamy soundscapes.
3 Arturia - User Manual REV LX-24 - Welcome to Rev LX-24!

Lexicon produced 3 versions of this reverb between 1978 and 1986. The 224X launched in
1982, which was finally replaced in 1984 by the 224XL. Each version improved along with
the technology of the day. Thanks to this, each version has its own particular 'sound', with
the first 2 versions being more desirable for their warmer, thicker sound that sits well in any
mix.
Arturia presents its own carefully modelled version of the original 224 unit with its final 4.4
firmware. Travel back in time, without the need to house and maintain hefty rack kit or pay
the steep price for a vintage unit.
1.1.1. Those amazing algorithms
One thing Lexicon are famed for are their amazing algorithms. They got it absolutely right
first time with the 224. The LX-24 contains 8 of the algorithms found on the original.
1. Small Concert Hall B
2. Vocal Plate
3. Large Concert Hall B
4. Acoustic Chamber
5. Percussion Plate A
6. Small Concert Hall A
7. Room A
8. Constant Density Plate
The letter A or B which follows the name of some of the algorithms, refers to the revision of
a given algorithm. Some older firmwares had different algorithm combinations.
1.2. Rev LX-24 Feature Summary
Algorithm (selector): Selects 1 of 8 reverb algorithm.
Decay (slider): Sets the reverberation decay time of Bass and Mid. On the original this
feature was split between 2 faders, one each for Bass & Mid.
Bass Offset (slider): Sets the reverberation time of frequencies below the crossover cutoff,
relative to the mid slider.
Crossover (slider): Controls the frequency at which the signal is split between Bass and Mid.
Damping (slider): Sets the cutoff frequency of the internal Low-Pass filter in the feedback
path. Labelled “TREBLE DECAY” on the original.
Arturia - User Manual REV LX-24 - Welcome to Rev LX-24! 4

Pre-Delay: sets the amount of delay before the reverberated signal is heard. This setting
should be set to best match your algorithm. For example, a larger pre-delay time when using
Large Concert Hall B.
Distance (slider): Adjusts the perceived distance between a sound and its reverberated
counterpart. Labelled "DEPTH" on the original
Dry/Wet: Sets the balance between the original & the reverberated signal. The higher this is
set, the less of your original or "Dry" signal is heard and the more reverb is heard.
Dry/Wet Lock: locks the current value of the dry/wet knob when browsing through presets.
Lock : Locks the parameter values when changing algorithms. Labelled "IMMED" for
Immediate mode on the original unit. Contrary to the original, Mode Enhancement, Decay
optimization and Pitch Shift settings are not reset when Lock is active.
Mode Enhancement (on/off toggle + stepped control 1-16) : Increases the effective density
of modes by modulating the algorithm time delay. It controls the coloration at the end of
the 224 decay and produces a noticeably warmer sound. Lower values make the effect
stronger.
Decay optimization (on/off toggle + stepped control 1-16) : Improves the naturalness of the
decay by altering internal parameters in response to changes in the input level. It can tell
the difference between drums and vocals and adjusts its parameters correctly for each. It
increases the clarity and reduces the coloration of the decay, but can make it uneven. Lower
values make the effect stronger.
1.2.1. Expanded features:
Drive: Compensated drive around the input transformer 0 to +50 dB. It will mostly react to
low frequencies and begin to highpass the signal if too much is applied. It is situated before
the input highpass, allowing to generate harmonics from low tones even if they are cut.
Hi-Pass Filter Cutoff: Sets the cutoff Frequency of the wet path input HPF. 12dB/octave or
24dB/octave ; Q=0.707 Use this to set the amount of high frequency that passes above the
set value. It can be used to remove a lot of the low frequencies.
Dynamic module: Features a choice of 3 additional dynamic effects - Ducker, Tremolo and
Gate - adding movement and timing to the reverb sound.
Brightness: Linear tilt on the reverb wet signal, right before the dry/wet control. Use this
setting to add a high frequency boost to your reverb. This can be helpful to add some extra
sparkle to your reverb, especially when in one of the Vintage modes.
Stereo Width: Adjusts the stereo width of the reverberated signal. This works to put your
reverb into a wider stereo field, helping to emulate a real acoustic space and add more
realism.
Pitch Shift : Increases the range of modulation for Mode Enhancement. Higher values give
higher modulation. Going to 4-5 will make the reverb tail sound like it contains a chorus
effect and higher values will give audible pitch shifting. The effect is reduced when high
values are set in Mode Enhancement, and disabled if Mode Enhancement is off.
Diffusion: Adjusts the amount of diffusion coming from the all-pass delays. It is accessible
with “Shift + DEPTH" on the original unit.
We hope that this powerful, easy-to-use reverb becomes an essential part of your creative
toolbox, and that it leads you to many great creative discoveries!
5 Arturia - User Manual REV LX-24 - Welcome to Rev LX-24!

2. ACTIVATION AND GETTING STARTED
2.1. Compatibility
Rev LX-24 works on computers and laptops equipped with Windows 8.1 or later or macOS
10.13 or later. It is compatible with the current generation of Apple M1, M1 Pro/Max/Ultra, and
other Apple Silicon processors. You can use it as an Audio Unit, AAX, VST2, or VST3 plug-in
within your favorite recording software, or as a standalone effect.
2.2. Download and Install
You can download Rev LX-24 directly from the Arturia Products Page by clicking either the
Buy Now or Get Free Demo options. The free demo is limited to 20 minutes of operation.
If you have not already done so, now is a good time to create an Arturia account by
following the instructions on the My Arturia webpage.
Once you install Rev LX-24, the next step is to register the software. This is a simple process
that involves a different software program, the Arturia Software Center.
2.2.1. Arturia Software Center (ASC)
If you haven't installed ASC yet, please go to this web page: Arturia Downloads & Manuals.
Look for the Arturia Software Center near the top of the page, and then download the
installer version for the system you’re using (Windows or macOS). ASC is a remote client
for your Arturia account, letting you conveniently manage all your licenses, downloads, and
updates from one place.
After you complete the installation, proceed to do the following:
• Launch the Arturia Software Center (ASC).
• Log into your Arturia account from ASC’s interface.
• Scroll down to the 'My Products' section of ASC.
• Click on the 'Activate' button next to the software you want to start using (in this
case, Rev LX-24).
It's as simple as that!
Arturia - User Manual REV LX-24 - Activation and Gettin Started 6

2.3. Working with Rev LX-24 as a plug-in
Rev LX-24 can be used as a plug-in within all major Digital Audio Workstation (DAW)
programs including Cubase, Digital Performer, Live, Logic, Pro Tools, REAPER, Studio One,
and more.
Plug-ins have numerous advantages over hardware, including:
• You can use as many instances on different tracks as your computer can handle.
• You can automate the plug-in’s settings via your DAW’s automation feature.
• All settings and changes are saved with your DAW project, letting you pick up
right where you left off.
Audio and MIDI settings for Rev LX-24 as a plug-in
When Rev LX-24 is used as a plug-in, settings for audio and MIDI routing are handled in
your recording software or DAW. They are generally located in some type of Preferences
menu, though each product does things a bit differently. So, consult your recording
software’s documentation for information on how to select your audio interface, active
outputs, sample rate, MIDI ports, project tempo, buffer size, etc.
Now that you've set up your software, it’s time to explore all of the possibilities to be found
in Rev LX-24!
7 Arturia - User Manual REV LX-24 - Activation and Gettin Started

3. MAIN PANEL
The Main Panel is where you'll be doing the majority of your adjustments to the reverb. We'll
talk about the Advanced Panel [p.14] in the next chapter.
3.1. Navigation and Control
The Main Panel, whilst maintaining the aesthetic of the original Lexicon Alphanumeric
Remote Control (or LARC) has been somewhat simplified.
This means you not only have the same combination of buttons and sliders as in the
original, but you will use the display above to select Algorithms. On top of this you can also
dive a bit deeper using the advanced panel.
3.1.1. Display, buttons, and faders
The Original LARC features 16 buttons above the faders, 8 of which are dedicated to
selecting algorithms.
The function of these 8 select buttons has been replaced on the display. You can either use
the 2 arrows, one either side of the LED, displaying the name of the selected algorithm or
by clicking on the name to show a dropdown menu. When a fader is used, the value is
displayed here, along with an LED with the relevant measurement unit.
The display also contains audio input level LEDs up to 0 dB and a processor overflow
indicator. On the original, this overflow illuminates under high input or bad settings, which
would cause the arrhythmic processor to overflow, this function has been replicated here in
software.
The 8 remaining buttons perform more operational functions, some of which are covered
here, like Lock, Mode-Enh and Decay Optim.
Arturia - User Manual REV LX-24 - Main Panel 8

The buttons situated above the faders feature some enhancements over the original. They
allow easy access to 4 functions, including convertor output modes. These buttons are
latching and can be toggled on/ off. However, you will always have one of the convertor
output mode selected, whether Vintage or Modern. Vintage modes are signified by a color
LED, yellow for Vintage modes and blue for Modern.
The Faders not only replicate those found on the original but also add a wet/ dry mix to
enable you to easily blend the reverb when inserted. When operating a fader the display
above shows the value and relevant measurement unit.
3.1.2. Fine Adjustments
To adjust a control more slowly and precisely use the right mouse button, while operating it.
You can also hold Control (Windows and macOS) whilst drag while holding the left mouse
button.
3.1.3. Parameter Name Display
Hovering on any control will cause its full name to appear in the left side of the Lower
Toolbar.
3.1.4. Double Click for Default
Last but not least, you can double-click on any control to return it to its default value. To reset
an arc, double-click inside the arc.
9 Arturia - User Manual REV LX-24 - Main Panel

3.2. Reverb algorithms
At the very heart of Rev LX-24 are the Reverb Algorithms. We have lovingly recreated 8
Reverb types of the original hardware here. These mathematical programs simulate the
sound of reverberation and were originally supplied on circuit boards. These boards had to
be shipped back to Lexicon to receive additional or update existing algorithms. Thanks to the
limited computation power of the day and quoting from the original manual 'the programs
differ greatly in both the type of natural acoustics they try to simulate, and the way they
differ from the ideal'. Which perhaps is the very reason these units are so revered for their
sound and how well they sit in a mix!
1. Small Concert Hall B
2. Vocal Plate
3. Large Concert Hall B
4. Acoustic Chamber
5. Percussion Plate A
6. Small Concert Hall A
7. Room A
8. Constant Density Plate
When selecting a new Algorithm, the faders below change position. These parameter
settings have been chosen to best replicate the actual characteristics of the emulated space.
For example it takes into consideration the liveness of a room or the size of a Hall. As in the
original, this is also the starting point for you to adjust the reverb to your preference. Use the
Lock button to avoid this behavior.
Arturia - User Manual REV LX-24 - Main Panel 10

3.3. Algorithm programs
•Small Concert Hall B: All concert Hall programs (Small Concert Hall A/B, and
Large Concert Hall B) are intended to put 'behind' the music, not with it, so mix
accordingly. Small Concert Hall B is useful when a sense of space and depth is
needed. This program is a modification of Small Concert Hall A and sounds more
natural and mimics the sound of air absorption better. For best results use on
your mix, keeping the reverb time shorter or use to 'fill-out' a drum or vocal track.
•Vocal Plate: Based on one of the first synthetic reverbs ever designed, a steel
plate under tension with springs! As the name suggests this version is tailored
for use on vocals. It has less initial diffusion and as clearer, brighter sound. It
can also be used on drums, adding a slightly grainy sound. However, use the
Percussion plate to better reverberate lower frequencies.
•Large Concert Hall B: Choose this algorithm where a more natural sound is
required. As the name suggests, this is a Large concert hall and can be used to
increase the spaciousness of your source. As such, you may want to keep an eye
on your crossover frequency and watch out as the bass may soon overpower
your sound. This reverb is very uncolored, and it is recommended for orchestral
instruments.
•Acoustic Chamber: This program is based on an echo chamber, which was a
physical room, often tiled to create a very reflective space within to amplify and
record a reverberate sound. The Acoustic chamber here emulates that process.
With less initial diffusion, this program is good on a variety of applications where
a short reverb is required. The most chamber-like sound is achieved by having a
very low distance setting. A surefire way to replicate classic 50s reverb.
•Percussion Plate A: Again the clue is in the title and this algorithm is an emulation
of a Plate reverb, voiced for percussion. This has a very high initial diffusion
and a very smooth sound for transient material. It has noticeable coloration
which increases at the end of the decay unless Mode Enhancement or Decay
Optimization are used.
•Small Concert Hall A: Small Concert Hall A is useful when a sense of space and
depth is needed. This program differs slightly from Small Concert Hall B in that it
is less natural sounding and the decay only affects the sound after the first 300
ms. For best results use as you would Small Concert Hall B, but appreciate the
imperfections as the difference!
•Room A: This program emulates a small acoustic space, replicating the
ambiance of a room with flat surfaces and parallel walls. Known for a resonant
sound this lends itself well to rock'n'roll. Add this to vocals, drums and just about
any sound that would benefit from a highly reflective short reverb. This algorithm
is tuned to be a little more lively by default. Its modulations are fast, and pitch
shift makes a nice pitch vibrato.
•Constant Density Plate: The last Plate program offers an interesting twist by
having constant density over time, unlike a natural reverb whose density
increases. Featuring a high initial density and coloration, this program can result
in a much less washy reverb tail. Try this on drums and use the gate found under
the Advanced panel to recreate that gated drum sound so often found on the hits
of the 80s. Finally, this algorithm can sound very metallic, and can also be great
for special effects.
With Constant Density Plate, distance works a bit differently compared with other algorithms,
adding big discrete early reflections with higher settings.
11 Arturia - User Manual REV LX-24 - Main Panel

3.4. Buttons
The Buttons perform a few very useful functions as found on the original plus 3 convertor
types: 2 Vintage and 1 Modern, so you can choose whether you want your reverb cleaner
than it ever was or with grit and grain!
The following can be toggled ON or OFF
•LOCK: This Function locks the faders in the position set to allow you to browse
Algorithms without losing your settings.
•MODE ENH: Mode Enhancement can be used to greatly improve the naturalness
of the reverb. It works by continuously modulating the algorithms delay times.
MODE ENH also controls coloration at the end of the reverb decay, producing
a warmer sound. Try this on exposed vocals: you should hear a more metallic
reverb sound without the Mode Enhancement".
•DECAY OPTIM: Decay Optimization improves the naturalness of the decay and
can be used in conjunction with MODE ENH. It alters internal parameters
continuously, in response to changes in level at the input stage. This mode
increases the clarity and reduces coloration of the decay and can make the
decay uneven. Try this on exposed Drums to hear: this becomes more obvious
when using higher distance values.
One of the following must be selected
•VINTAGE 12: This runs at the sample rate of 20480Hz, as in the original. Use this
mode to run the Rev LX-24 in all its vintage 12-bit glory, modelling carefully the
transformer and analog to digital conversion and back ( ADC/ DAC). This includes
a high frequency elliptical filter set at 8k, pre-emphasis, de-emphasis. This mode
has all the artefacts, quantization errors and noise of the original.
•VINTAGE 24: This runs at the sample rate of 20480Hz, as in the original. Use
this mode to achieve a similar effect to the Vintage 12 mode, modelling carefully
the transformer and analog to digital conversion and back (ADC/DAC). With high
frequency elliptical filter set at 8k, pre-emphasis, de-emphasis but with a much
quieter 24-bit conversion.
•MODERN: This runs at the sample rate set by your DAW. It also keeps the
input transformer modelling, thereby retaining the sound but removes artefacts,
quantization errors and noise by removing the noise floor. This mode bypasses
the high frequency elliptical filter set at 8k, pre-emphasis, de-emphasis, ADC/DAC
and diodes found in the Vintage modes.
Arturia - User Manual REV LX-24 - Main Panel 12

3.5. Faders
The faders here are where we adjust controls to best contour our reverberant space. Each
Algorithm has its own preset settings for each fader.
•DECAY: This fader sets the overall reverberation time or decay of the reverb. This
control affects the time of Bass and Mid, while you had to adjust 'MID' and 'BASS'
separately on the original 224. It can be set anywhere between 600 ms and 70
seconds.
•BASS OFFSET: This fader sets the reverberation time of frequencies below the
crossover frequency. When increasing / decreasing BASS OFFSET the overall
decay time is also effected. Choose a value +/- 100 to adjust bass time in your
reverb.
•CROSSOVER: This fader sets the upper frequency at which the Bass reverb splits
from mid. Choose frequencies between 100 Hz and 10.9 kHz.
•DAMPING: This fader sets the cutoff frequency of the internal low pass filter
to replicate damping in a reverberant space. labelled as 'TREBLE DECAY' on the
original 224, this control can quickly darken the sound of your reverb. Choose
frequencies between 100 Hz and 10.9 kHz.
•PRE-DELAY: This fader sets the amount of delay between the incoming signal
and onset of the reverberation. It can be used to replicate the size of your space,
careful use of this can make all the difference in your mix. The range of the Pre-
Delay depends on the selected algorithm. For example, for Plates algorithms, the
Pre-Delay range is from 0 ms to 107 ms, while the range is from 24 ms to 255
ms for the Room algorithm.
•DISTANCE: Labelled as 'DEPTH' on the original 224, this fader sets the perceived
distance between the source and the reverb by adjusting the time, volume,
number and pattern of early reflections. As on the original it can be set anywhere
between 0 and 71, which as on the original are arbitrary units.
•DRY/ WET: This control is not found on the original but allows us to blend a
dry signal into the wet from 0 to 100 %. Very useful when using the Rev LX-24
inserted on a track. Below this is a small lock button which enables us to preserve
the mix setting when changing presets.
13 Arturia - User Manual REV LX-24 - Main Panel

4. ADVANCED PANEL
4.1. Overview
Click the Advanced Button [p.25] at the top right of the upper toolbar to open Rev LX-24's
Advanced Panel.
1. Top Ribbon: Access to Algorithm selection, lock function and convertor modes,
vintage or modern.
2. Visual Display: Giving you all of the parameter control in a graphic form. Allowing
you to manipulate the reverb in a very modern way, undreamt of in 1978!
3. Lower Ribbon: Add input drive, dynamic effects, brightness, stereo width and
reverb level here.
4.2. Top Ribbon
As the features in the top ribbon have already been explained in the Main Panel [p.8] we'll
look at the visual display and lower ribbon.
Arturia - User Manual REV LX-24 - Advanced Panel 14

4.3. Visual Display
Here you have access to all the same control faders as in the original LARC. However here
you can see the results quickly thanks to a waveform display.
All of the 7 faders from the Main Page are represented here as either a fader or a square
in the display. Explained fully in the Main Panel [p.8] In addition to this there is a handy
diamond that links the decay to the crossover frequency. The graphic display, shows the
input dry signal or spectrum, in real time while the colored cloud shows the reverb signals.
The longer the decay, the stronger the cloud. So you're able to easily tailor your reverb to
your needs with this handy tool.
Below the display are MODE ENH & DECAY OPT, as featured on the main Panel - however,
in that panel, you can fine-tune their values and behavior in increments up to 16. In addition
to this you have Pitch shift, which works in conjunction with MODE ENH and a Diffusion
parameter, as found from version 4.0 software of the original 224.
•MODE ENH: This setting increases the effective density of modes in the REV
LX-24. This works by altering some of the internal parameters continuously,
these parameters are different, depending on which algorithm is active. It
greatly improves the reverb, making it sound more natural by controlling the
coloration at the end of the decay, producing a noticeably warmer and lively
sound. A higher parameter setting means less effect.
•DECAY OPT: Improves the naturalness of the decay by altering internal
parameters in response to changes in the input level. It can tell the difference
between drums and vocals and adjusts its parameters correctly for each. It
increases the clarity and reduces the coloration of the decay, but can also make
the decay uneven on some sources. A higher parameter setting means less
effect.
•Pitch Shift: Pitch Shift gives you the ability to increase the amount of pitch shift
effect in Mode Enhancement. At its lowest setting you can achieve a chorus like
effect. At the top end it sounds very detuned.
•Diffusion: Use this to control the initial buildup of the reverb over time. This is
achieved on the 224, by generating echo density through all-pass delays. Adjusts
this in conjunction with your chosen algorithm to produce a more natural reverb.
A real room or hall will naturally contain high levels of diffusion, as it will have
more contents to 'diffuse' the sound reflected. A high setting will result in an
initial high buildup of echo density, useful for percussive sounds. Use a lower
setting for a more natural reverberant space good on vocals, solo instruments
and mixes. On the contrary, for drums, use a higher setting with your algorithm
to have a better fit.
15 Arturia - User Manual REV LX-24 - Advanced Panel