Solid State Logic DUENDE DUENDE User manual

DUENDE
User Guide
Version 2.0 Rev. A Mac & PC

Duende User Guide
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Table of Contents
. Safety and Installation Considerations ...............................................................................4
General Safety.............................................................................................................................................................. 4
Power Safety ................................................................................................................................................................ 4
Instructions for Disposal of WEEE by Users in the European Union.................................................................. 5
Standards Confor ance.............................................................................................................................................5
2. Product Specifications & System Requirements .................................................................5
Physical......................................................................................................................................................................... 5
Environ ental............................................................................................................................................................. 5
Perfor ance................................................................................................................................................................. 5
Syste Require ents for Apple Macintosh:...........................................................................................................5
Syste Require ents for Windows/PC:.................................................................................................................. 5
3. Introduction......................................................................................................................6
4. Installation........................................................................................................................7
Unpack.......................................................................................................................................................................... 7
Configure the Power Supply (If required)............................................................................................................... 7
Software & Hardware Installation (PC)................................................................................................................... 8
Software & Hardware Installation (Mac).................................................................................................................8
5. Operational Overview ......................................................................................................9
5.1 Duende Preferences/Control Panel................................................................................................................... 10
5.2 Launching a Duende plug-in............................................................................................................................. 10
5.3 DSP Resource Manage ent............................................................................................................................... 12
5.4 General guidelines for plug-in Delay Co pensation .................................................................................... 12
Using Auto atic Delay Co pensation in Pro Tools HD.................................................................................... 15
6. Duende EQ and Dynamics Channel Strip........................................................................ 8
6.1 Introduction ......................................................................................................................................................... 18
6.2 Input Section........................................................................................................................................................ 18
6.3 Filter Section ........................................................................................................................................................ 18
6.4 Equaliser Section ................................................................................................................................................. 20
Operation............................................................................................................................................................... 20
6.5 Dyna ics Section................................................................................................................................................ 22
Dyna ics Section Diagra ................................................................................................................................. 22
................................................................................................................................................................................ 22
Co pressor/Li iter.................................................................................................................................................. 23
Introduction .......................................................................................................................................................... 23
Detailed Para eter Description ......................................................................................................................... 23
6.6 Advanced Signal Routing Options................................................................................................................... 25

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Channel Processing Order .................................................................................................................................. 25
Side Chain Processing Order.............................................................................................................................. 25
7. Duende Stereo Bus Compressor ......................................................................................26
Introduction ............................................................................................................................................................... 26
Detailed Para eter Description.............................................................................................................................. 26
8. Duende Support ............................................................................................................27
Support FAQs............................................................................................................................................................ 27
9. Warranty ........................................................................................................................28

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. Safety and Installation Considerations
This section contains definitions, warnings, and practical infor ation to ensure a safe working environ ent.
Please take time to read this section before installing or using this unit. Please do not dispose of these instructions.
General Safety
•Read these instructions.
•Keep these instructions.
•Heed all warnings.
•Follow all instructions.
•Do not use this apparatus near water.
•Do not expose this apparatus to rain or oisture.
•Clean only with dry cloth.
•Do not block any ventilation openings. Install in
accordance with the anufacturer’s instructions.
•Do not install near any heat sources such as
radiators, heat registers, stoves or other apparatus
(including a plifiers) that produce heat.
•There are no user-adjustable, or user-servicable
ite s, inside this apparatus. Do not re ove the
covers of this apparatus; doing so will invalidate
your warranty.
•Refer all servicing to qualified personnel. Servicing
is required when the power supply has been
da aged in any way, liquid has been spilled or
objects have fallen into the apparatus, the apparatus
has been exposed to rain or oisture, does not
operate nor ally or has been dropped.
•Adjust ents or alterations to this apparatus ay
affect the perfor ance such that safety and/or
international co pliance standards ay no longer
be et.
Power Safety
This apparatus is supplied with a universal power supply,
approved and certified for operation with this apparatus –
adaptors are supplied to enable use world-wide, as required.
There are no user-replaceable fuses.
•Where the universal power supply is required, use
only the Solid State Logic-provided power supply.
Use of any other power supply is not covered by
your warranty and ay cause fire or explosion.
•Any external power supply ay beco e hot during
nor al operation of the unit. Use care when
handling the power supply.
•Do not atte pt to odify the power supply unit in
any way – other than to fit the appropriate power
adaptor, as required (see overleaf).
•If an extension power cable or adaptor is used,
ensure that the total power rating of the power cable
and/or adaptor is not exceeded.
•The power socket used for this apparatus should be
located nearby and be easily accessible.
•Unplug this apparatus during an electrical stor or
when unused for long periods of ti e.
Installation Notes
•When installing this apparatus, place the apparatus
on a secure level surface.
•Ensure that no strain is placed on the cables
connecting to this apparatus.
•Ensure also that such cables are not placed where
they can be stepped on, pulled or tripped over.
•Do not operate this apparatus whilst it is covered or
boxed in any way.
A high quality IEEE1394/Firewire 400 cable is supplied. Use of
alternative, inferior cables ay result in reduced perfor ance,
including increased susceptibility to external interference.
Although IEEE1394/Firewire per its ‘hot-plugging’ there are
persistent reports of per anent da age caused to either host
or peripheral equip ent by this practice. Therefore, Solid State
Logic strongly reco ends that IEEE1394/Firewire
connections are ade only when both the host and Duende
units are unpowered.
This equip ent has been tested
and found to co ply with the
li its for a Class B digital
device, pursuant to part 15 of
the FCC Rules. These li its are designed to provide
reasonable protection against har ful interference in a
residential installation. This equip ent generates, uses and
can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, ay cause har ful
interference to radio co unications. However, there is no
guarantee that interference will not occur in a particular
installation. If this equip ent does cause har ful interference
to radio or television reception, which can be deter ined by
turning the equip ent off and on, the user is encouraged to
try to correct the interference by one or ore of the following
easures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equip ent and
receiver.
•Connect the equip ent into an outlet on a circuit
different fro that to which the receiver is
connected.
•Consult the dealer or an experienced radio/ TV
technician for help.

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Instructions for Disposal of WEEE by Users in the European
Union
The sy bol shown here is on the product or on
its packaging, which indicates that this product
ust not be disposed of with other waste.
Instead, it is the user’s responsibility to dispose
of their waste equip ent by handing it over to a
designated collection point for recycling of waste electrical and
electronic equip ent. The separate collection and recycling of
your waste equip ent at the ti e of disposal will help to
conserve natural resources and ensure that it is recycled in a
anner that protects hu an health and the environ ent. For
ore infor ation about where you can drop off your waste
equip ent for recycling, please contact your local city office,
your household waste disposal service or where you
purchased the product.
Standards Conformance
For CE confor ance, this apparatus confor s to the following
standards:
•EN 60950 Safety for infor ation technology
equip ent, including electrical business (IEC 60950)
equip ent
•EN 55022 Li its and ethods of easure ent of
radio disturbance characteristics (CISPR 22) of
infor ation technology equip ent
•EN 55024 Infor ation technology equip ent –
i unity characteristics – (CISPR 24) li its and
ethods of easure ent
With reference to regulations in the following directives:
73/23/EEC, 89/336/EEC
2. Product Specifications & System
Requirements
Physical
Depth 165 / 6.5 inches casing only
235 / 9.25 inches inc’ connectors
Height 44.5 / 1.75 inches (1 RU)
Width 438 / 17.25 inches casing only
482 / 19 inches inc’ rack ears
Weight 1.8kg / 4 pounds
Power < 6 Watts
Boxed size 320 x 550 x 80
12.75" x 21.75" x 3.25"
Boxed weight 2.6kg / 6 pounds
*All values are approximate
Environmental
Te perature Operating: +5 to 30 Deg. C
Non-operating: –20 to 50 Deg. C
Max. gradient: 15 Deg. C/Hour
Relative Operating: 20 to 80 %
Hu idity Non-operating: 5 to 90 %
Max. wet bulb: 29 Deg. C
(non-condensing)
Vibration Operating: < 0.2 G (3 - 100Hz)
Non-operating,
power off: < 0.4 G (3 - 100Hz)
Shock Operating: < 2 G (10 Sec. Max.)
Non-operating: < 10 G (10 Sec. Max.)
Altitude Operating: 0 to 3000
(above sea level) Non-operating: 0 to 12000
Performance
CPU 32bit ARM7 RISC Processor
DSP 4 x 333MHz SHARC® DSP
40bit Floating Point
Connection IEEE1394/Firewire 400
(1 x in/out, 1 x loop-through)
System equirements for Apple Macintosh:
•Mac PowerPC G4/G5 or Intel 1 Ghz or higher
•512Mb RAM (1Gb reco ended)
•Mac OS X (Version 10.4.8 or higher)
•1 spare IEEE1394/Firewire 400 port
•60Mb Hard Disk space
•Audio Units, VST or RTAS* co patible host
application
•One available Firewire port (1394A / 400 Mbit )
•17' or larger colour onitor with screen resolution of
1024 x 768 or higher reco ended
•Internet Connection (for product registration and to
download software updates)
•Approved Audio Interface
System equirements for Windows/PC:
•Mini u of Intel Pentiu IV 1.0GHz or equivalent
•512 MB RAM (1Gb reco ended)
•Windows XP Service Pack 1 or higher
•80Mb of free Hard Disk space
•Approved VST or RTAS* co patible host
application
•One available Firewire port (1394A / 400Mbit )
•17' or larger color onitor with screen resolution of
1024 x 768 or higher reco ended
•Internet Connection (for product registration and to
download software updates)
•Approved Audio Interface
NOTE: RTAS is supported through the integrated FXPansion VST-RTAS wrapper, a product developed by FXPansion Audio UK
Ltd. For ore info visit www.fxpansion.com An up-to-date list of tested configurations can be found at http://solid-state-logic-
en.custhelp.co

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3. Introduction
Hi – and thank you for purchasing Duende – the SSL processing solution for your audio
workstation. As you’re sat here reading this, the chances are that you have a pretty good
understanding of who we are and our outstanding reputation in audio recording technology. How
did we get here? Well, there were no great plans to ake SSL into a ajor anufacturer of ixing
consoles when it all started back in the seventies - the co pany began with nothing ore than an
enthusias for usic and the concept of recording. Along the way that spirit, coupled with a
passion for excellence in usic recording tools, helped build a ulti- illion dollar international
business. The SSL HQ ay be a little bigger now than it was in the seventies, but passion and
innovation still lies at its heart.
In 2005, we decided to e bark on a technology project to figure out how we could take the
processing power of a console and squeeze it into a 1U rack, so we could serve up the SSL sound to
ho e and project studio owners who don’t have the budget (or the floor space!) required to install
a large-for at console.
Drawing on our unique understanding of audio processing and years of DSP know-how, our tea
of engineers set about creating the SSL processing solution for your DAW environ ent. We knew
we needed serious DSP horsepower to acco odate our powerful algorith s, and we knew it
had to co e in a package that could integrate sea lessly with the ost popular workstations
… and so Duende was born.
Based on the digital technology behind SSL’s C-Series consoles, Duende delivers the co plete SSL
ix experience – powerful channel and dyna ics processing and the legendary Bus Co pressor.
Duende offers co plete integration into the ost popular workstation environ ents with one
si ple FireWire cable connection. The different processing blocks appear as VST/AU/RTAS plug-
ins – and include an authentic SSL channel strip with filters, E and G series EQ and dyna ics
processing, as well as the legendary SSL Bus Co pressor.
Oh, you’re probably wondering about the na e, right? It was a hot day, so eone in the tea had
bought in a CD of fla enco guitar usic and one of the tunes, ‘Duende’, just kind of hung in the
air. So ething inspired us to discover that in fla enco culture, Duende is a word for spirit, soul,
it’s the force that inspires the usic. That just see ed to sit well as a description for the 1U silver
box before us. We hope you will enjoy ixing your usic with Duende.
For product news and software updates please register at www.solid-state-logic.co /duende
And don’t forget to join the www. ixbuss.co co unity, the on-line resource for sharing
knowledge on better usic production.

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4. Installation
Unpack
Your Duende Box should contain the following:
Universal Power Supply + World-Wide A
socket adapters
2m 6-Pin Firewire able
D and Installation Guide
The Duende Unit
Configure the Power Supply (If required)
Configure the Duende power supply to suit your local ains connection:
* Illustration shows UK mains adaptor – AU,
Euro and US adaptors are also supplied see
opposite).
Refer also to the ‘Safety and Installation
Considerations’ section at the beginning of
this manual. The power supply supplied may
differ from the one illustrated here.

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Software & Hardware Installation (PC)
1) Insert the Duende installation CD in
your CD drive
2) Navigate to your CD drive
3) Launch the Duende installer by
double clicking the Duende installer
icon
4) Follow the installation instructions on
the screen
5) Connect IEEE 1394 Firewire Cable
6) Connect Power
7) Switch Duende On
After the Duende installer has installed all of the required software on your co puter, click
‘Finish’ to quit the installer.
Software & Hardware Installation (Mac)
onnect Duende
1) Ensure that both Duende and your
co puter are powered down
2) Connect IEEE1394/Firewire
3) Connect Power
4) Switch Co puter On
5) Switch Duende On
6) Insert the Duende installation CD in
your CD drive
7) Click the Duende icon to view the CD
content
8) Launch the Duende installer by
double clicking the Duende Installer
icon
9) Follow the installation instructions on
screen
After the Duende installer has installed all of the required software on your co puter, click ‘Finish
Up’ to quit the installer.

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5. Operational Overview
Once your Duende hardware and software has been properly installed, Duende plug-ins are
accessed and used just like any host-based plug-in. You can run Duende plug-ins si ultaneously
with your other host based plug-ins in any co bination.
All Duende plug-ins support up to 40bit 96kHz operation. Please note that Duende plug-ins use
twice as uch DSP resources at 96kHz.
Duende para eters are changed by dragging, rotating or clicking knobs and buttons, whose
behavior varies slightly depending on which software is being used to host the plug-ins. Generally
the further away the ouse pointer is fro the knob, the ore resolution is available for
para eter adjust ent.
When the ouse cursor is hovered over a knob it’s value is displayed in the appropriate units. At
any point you can see exactly what value a knob has without touching it. If you have a ouse with
scroll wheel, it can be used to change the knob position.
OS X:
To reset a knob to its default value hold 'COMMAND' whilst clicking on that knob.
For very fine adjust ent, hold 'SHIFT' whilst dragging.
Windows XP:
To reset a knob to its default value hold 'CTRL' whilst clicking on that knob.
Every Duende plug-in para eter can be auto ated so long as para eter auto ation is supported
by the host application. The ethod for recording and editing auto ation varies fro host to host.
For specific instructions on using auto ation with the host consult the host application
docu entation.

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5.1 Duende Preferences/Control Panel
OS X Windows XP
The Duende Preferences/Control Panel shows infor ation about your Duende such as serial no
(Authentication ID), fir ware version and driver version. It also displays DSP resource
infor ation and allows you to easily see how uch DSP you have available at any ti e.
OS X:
The panel can be found by navigating to 'Apple Menu>Syste Preferences>SSL Duende'.
Windows XP:
The panel can be found in ‘Start Menu>Proga s>Solid State Logic>Duende’ or in the Windows
control panel.
Each ono plug-in loaded into Duende will take up one slot, a '1' representing a used slot and a '- '
representing an unused slot. At 44.1 and 48kHz there are 32 slots available and at 88.2 and 96kHz
there are 16 slots available. A stereo version of a plug in will take up 2 slots.
5.2 Launching a Duende plug-in
Each host application has its own particular ethods for instantiating (launching) a plug-in.
Consult the host application docu entation for specific instructions on loading and using plug-ins
within the application.

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Launching a Duende channel strip in Logic 7:
Launching a Duende channel strip in ubase SX:

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5.3 DSP esource Management
Due to the nature of Duende having 4 DSP chips, a ini al a ount of resource anage ent
should be done when running Duende at high load.
If there are, for exa ple 2 slots free and you wish to load a stereo plug-in, Duende will under
certain conditions notify you that you are out of DSP resources. This will only happen if the two
slots are on different DSP chips as Duende is not able to load a stereo plug-in across 2 chips. This
ay well occur because you have filled up all the resources and subsequently unloaded 2 ono
plug-ins. This situation can be seen in the diagra below:
As you can see above, the two re aining slots reside on different DSP chips and in this case when
you atte pt to load a stereo plug-in you will encounter the afore entioned situation.
The way to handle this is as follows:
1. Save your project/song
2. Close your project/song
3. Re-open project/song
When this has been done Duende will be forced to reload all the plug-ins but will do so in the ost
econo ical way possible. The 2 free slots will now reside on the sa e DSP chip allowing the
loading of a stereo plug-in.
5.4 General guidelines for plug-in Delay Compensation
When Duende plug-ins are used, the audio data to be processed by Duende is sent to the Duende
DSP engine by the host application. The audio is then processed by the DSPs and sent back to the
host application.
This transfer of audio data produces latency (delay) in the audio signal being processed. Latency
ti e is dependant on the sa ple rate, type of plug-in(s) loaded and the audio interface buffer
setting.
If this latency is not co pensated, the processed audio will arrive late in relation to the
unprocessed audio. The ore processing that takes place on a particular signal, the later it will
arrive back in the host.

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Most host applications auto atically co pensate for this latency by si ply turning on the Plug-in
Delay Co pensation (PDC) or si ilar, usually found in the applications preferences. So e hosts
even provide full plug-in delay co pensation throughout the entire signal path, including sends,
groups, and buses.
The location of the settings for the PDC option within so e co on host applications is as
follows:
ubase SX + Nuendo 2/3:
Always on unless the ‘Constrain Delay Co pensation’ feature is used to disable delay
co pensation on individual plug-ins: ‘Devices Menu>Plug-in Infor ation>Use Delay
Co pensation’
Logic Pro:
‘Preferences>Audio>General’
Digital Performer 4/5:
‘Setup enu>Configure Audio Syste >Configure Studio Settings...’
Ableton Live:
‘Options>Delay Co pensation’
Important: Delay compensation is fully automatic and requires no user intervention when Duende plug-ins
are used in hosts that support full Plug-in Delay Compensation.
PD No PD
Steinberg Cubase 4
Steinberg Cubase SX 2 & 3
Steinberg Nuendo 2 & 3
Logic Pro 7.1 or higher
Digital Perfor er 4.5 & higher
Pro Tools HD 7 or higher
Ableton Live 5
Cakewalk Sonar 5 & 6
Final Cut Pro
Soundtracks Pro
Garageband
Pro Tools LE and M-Powered
Depending on the host application i ple entation, the delay co pensation feature ay not
provide auto atic co pensation when Duende plug-ins are inserted on sends, groups, or buses.
In this situation, the solution is to anually co pensate for the plug-ins.
These explanations of delay co pensation apply pri arily to playback only.

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Compensating for latency in Pro Tools LE and M-Powered
Because Pro Tools LE and M-Powered do not feature PDC it ust be done anually when Duende
plug-ins are used. Due to the use of firewire and the nature of how signals are sent to and fro
Duende, a latency is introduced which will delay any audio track, aux input, aster fader or
instru ent track by a specified a ount.
Tracks that use no Duende plug-ins or less than the track with the ost Duende plug-ins will need
to be delayed so they are all in ti e. Because this latency is reported by Pro Tools it is easily
co pensated for.
Here’s how:
The track with the ost Duende plug-ins will introduce the ost latency, those with 1 or 2 plug-
ins will introduce less and those with no Duende plug-ins will introduce no latency (providing
other plug-ins that introduce latency are not used).
To find out the latency introduced on a particular track by Duende plug-ins, go to the channel in
the ixer and ‘COMMAND/CTRL+CLICK’ twice in the green text below the fader (nor ally
showing vol). The value shown (dly) is the latency introduced on that track in sa ples.
Now load the ‘Digidesign Ti e Adjuster Long’ plug-in on, for exa ple, a track with no Duende
plug-ins. Double click on the delay box and type in the latency value of the track that has the ost
Duende plug-ins. The track with the ost Duende plug-ins and the track with none will now be
perfectly in sync on playback.

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Any tracks that have a s aller latency than the axi u ust also be delayed but by a s aller
a ount (i.e. tracks with 1 Duende plug-in where the axi u has 3). The delay value for these
will be axi u latency inus the latency reported by that track.
Using Automatic Delay Compensation in Pro Tools HD
Pro Tools HD users have the luxury of being able to use Auto atic Delay Co pensation, as
opposed to the anual ethod required in Pro Tools LE and M-Powered. However, there are still
so e considerations to be taken into account to ake sure all Duende plug-ins are co pensated
for and everything stays perfectly in sync.
To turn on ADC in PTHD go to ‘Setup>Playback Engine’ whilst Pro Tools is stopped and you will
see a box labeled ‘Delay Co pensation Engine’. Change the setting here to ‘Long (4095 Sa ples
per channel)’.
Pro Tools will then tell you that it will close and re-open your session after clicking the OK button
in the dialogue box; therefore ake sure you have saved your session prior to doing this. Also put
the CPU usage li it to 85%.
Pro Tools will now auto atically co pensate for any introduced latency of 4095 sa ples or less.

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This eans that you can generally use up to 2 Duende plug-ins per channel without considering
latency issues, but this will depend on the buffer size set in Pro Tools, the sa ple rate and which
Duende plug-ins are loaded.
Note that if an audio track with 1 Duende plug-in is routed to an aux channel with 2 Duende plug-
ins the total latency for that audio getting to the ix bus will equal 3 plug-ins; this will however be
clearly shown by Pro Tools.

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To view the latency introduced by plug-ins go to the botto left hand corner
of the Mix view, click on the s all black/grey box and select ‘Delay
Co pensation’.
Here you will find 2 values; ‘dly’ is the a ount of latency introduced by the
plug-ins on that channel and ‘c p’ is the nu ber of sa ples Pro Tools is
delaying the other channels by. If the ‘dly’ value is less than the 4095 set in
the Delay Co pensation box then you don’t need to worry and everything
will be co pensated for.
As you can see in the picture above the ‘kc erged’ channel has 1 Duende
channel strip loaded onto it, therefore Pro Tools is auto atically delaying
the other channels by that a ount (1028 sa ples) to ensure all audio is kept
in sync.
If the total latency on a channel exceeds this axi u value the text will be red indicating that
Pro Tools cannot co pensate for this uch latency. In this scenario the additional latency which
Pro Tools cannot co pensate for will have to be dealt with anually.
The value of this will be the axi u latency inus axi u latency Pro Tools can co pensate
for, ie 4095 sa ples. In this case it is:
4108 (shown in red) – 4095 (Pro Tools axi u ) = 13 sa ples
Please refer to the ‘Co pensating for latency in Pro Tools LE and M-Powered’ found in this
anual for infor ation on how to do this anually.

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6. Duende EQ and Dynamics Channel Strip
6.1 Introduction
The Duende EQ and Dyna ics Channel Strip plug-in is based on the EQ and co pressor sections
of the XL 9000 K Series console. SSL were the first anufacturer to feature dyna ics and EQ on
every channel on an in-line console with the SL 4000 B Series in 1977. The plug-in includes separate
high and low pass filters, a four band para etric equalizer, an independent co pressor/li iter
and gate/expander as well as input and output gain adjust ent knobs and a phase invert button.
Let’s have a closer look at each section in detail.
6.2 Input Section
Input Gain: Controls the level of the inco ing audio signal
Phase Reverse: Reverses the phase of the inco ing input signal
6.3 Filter Section
The Filter Section of the EQ and Dyna ics Channel Strip plug-in includes a 12dB/Octave low pass
filter and an 18dB/Octave high pass filter. The low pass filter operates fro 3kHz to 22 kHz and
the high pass filter operates fro 20Hz to 500Hz. In addition, each filter has an OUT position
which bypasses the filter.
There are three positions where the Filter Section can be placed: after the equalizer, before the
equalizer or in the sidechain of the dyna ics section.

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When no buttons in the Filter section are pressed, the filters co e after the Equalizer section
With the INPUT button pressed, the filters co e before the Equalizer section
When the DYN SC button is pressed, the filters are switched into the sidechain of the Dyna ics
section. The ter ‘sidechain’ and the process of sidechaining will be discussed in greater detail in
the overview of the Dyna ics section.
Using Filters
DYN S : The Filters are switched into the sidechain of the Dyna ics section. The Equaliser can be
switched into the sidechain independently. Note that DYN SC overrides the INPUT function (see
below).
INPUT: Moves the Filters to put the in circuit i ediately after the Channel Input section. This
allows the Filters to be used to clean up signals before co pressing the . Selecting Dyna ics ‘PRE
EQ’ will allow the co pressed signal to be EQ’d.
INPUT OUTPUT
Freq Hz
HPF
²t
18dB/Oct
acw
²t
acw
Freq kHz
LPF
12dB/Oct

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6.4 Equaliser Section
±dB Freq kHz Q ±dB Freq kHz Q ±dB Freq kHz
BELL
±dB Freq kHz
BELL
G
INPUT OUTPUT
LF LMF HMF HF
Operation
The equaliser included with the Duende EQ and Dyna ics Channel Strip plug-in is a four band
para etric EQ. Based on the XL 9000 K Series EQ circuit, this plug-in includes two distinct EQ
curves, one based on the SSL G Series EQ and another based on the latest version of SSL’s classic E
Series EQ.
The plug-in includes high and low frequency shelving equalizers (which can be switched to
peaking curves via the BELL button) and two overlapping equalizers with adjustable Q.
The LF section operates over a frequency range of 40Hz - 600Hz and is capable of up to 16.5dB of
cut or boost. The HF section operates over a frequency range of 1.5kHz - 22kHz and is capable of
up to 20dB of cut or boost.
Nor ally these shelving curves have a degree of overshoot/undershoot (depending on whether
you are boosting or cutting) below the selected HF frequency or above the selected LF frequency.
De-selecting the G button re oves the overshoot/undershoot effect and provides a slightly gentler
slope. Selecting BELL in either ode switches the equaliser to a peaking curve.
The LMF section operates over a frequency range of 200Hz - 2 kHz and is capable of ±20dB of gain
with a continuously variable Q fro 0.5 to 2.5.
The HMF section operates over a frequency range of 600Hz - 7kHz and is capable of ±20dB of gain
with a continuously variable Q fro 0.5 to 2.5.
Nor ally, at any Q setting, the bandwidth of the HMF and LMF sections varies with gain,
whereby an increase in boost or cut increases the selectivity of the EQ. This type of EQ can sound
effective when used at oderate settings; the gentle Q curve lends itself to the application of
overall EQ on co bined sources and subtle corrective adjust ents to instru ents and vocals.