DigiDesign Focusrite d3 Specifications

Focusrite D2™ and D3
Plug-Ins Guide
Legal Notices
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guide may not be duplicated in whole or in part without the
written consent of Avid.
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Contents
Chapter 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
System Requirements and Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Registering Plug-Ins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Working with Plug-Ins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Conventions Used in This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
About www.avid.com . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 2. Installation and Authorization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installing Plug-Ins for Pro Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Authorizing Plug-Ins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Removing Plug-Ins. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Chapter 3. Focusrite D2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Focusrite D2 Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Adjusting Plug-In Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
D2 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Using D2 in Stereo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chapter 4. Focusrite D3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Focusrite D3 Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Adjusting Plug-In Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
D3 Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
D3 Compressor Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
D3 Limiter Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Using the Side-Chain Input in Focusrite D3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Contents
iii
iv
Focusrite D2 and D3 Plug-Ins Guide
Chapter 1: Introduction
Congratulations on your purchase of the
Focusrite D2 or D3 plug-in for Pro Tools® and
VENUE™ systems. Focusrite D2 is a high-quality
digital equalizer plug-in, and Focusrite D3 is a
high-quality dynamics processor plug-in.
System Requirements and
Compatibility
The Focusrite D2 and D3 plug-ins are available in
AAX (DSP, Native, and AudioSuite), TDM,
RTAS®, and AudioSuite™ plug-in formats that retain the look and sound of Focusrite’s renowned
hardware units.
• An iLok USB Smart Key
To use Focusrite D2 or D3, you need the
following:
• An iLok.com account for managing iLok
licenses
• One of the following:
• A qualified Pro Tools system
The D2 and D3 plug-ins provide support for
44.1 kHz, 48 kHz, 88.2 kHz, 96 kHz, 176.4 kHz,
and 192 kHz sessions.
On 176.4 kHz or 192 kHz stereo tracks,
Focusrite is only available as a multi-mono
plug-in.
• A qualified Pro Tools system and a thirdparty software application that supports the
AAX, TDM, RTAS, or AudioSuite plug-in
standard
• A qualified Avid® Xpress®, Avid Xpress DV,
or Avid DNA™ system
• A qualified VENUE system (TDM only)
Avid can only assure compatibility and provide
support for hardware and software it has tested and
approved.
For complete system requirements and a list of
qualified computers, operating systems, hard
drives, and third-party devices, visit:
www.avid.com/compatibility
Chapter 1: Introduction
1
Registering Plug-Ins
Your plug-in purchase is automatically registered
when you activate your iLok license (see “Authorizing Plug-Ins” on page 5).
Registered users are eligible to receive software
update and upgrade notices.
For information on technical support, visit
www.avid.com.
Working with Plug-Ins
Besides the information provided in this guide, refer to the Pro Tools Reference Guide for general information on working with plug-ins,
including:
• Inserting plug-ins on tracks
• Using clip indicators
• Navigating the Plug-In window
• Adjusting plug-in controls
• Automating plug-ins
• Using side-chain inputs
• Using plug-in presets
Conventions Used in This
Guide
All Pro Tools guides use the following conventions to indicate menu choices and key
commands:
:
Convention
Action
File > Save
Choose Save from the
File menu
Control+N
Hold down the Control key
and press the N key
Control-click
Hold down the Control key
and click the mouse button
Right-click
Click with the right
mouse button
The names of Commands, Options, and Settings
that appear on-screen are in a different font.
The following symbols are used to highlight
important information:
User Tips are helpful hints for getting the
most from your Pro Tools system.
Important Notices include information that
could affect your Pro Tools session data or
the performance of your Pro Tools system.
Shortcuts show you useful keyboard or mouse
shortcuts.
Cross References point to related sections in
this guide and other Pro Tools and VENUE
guides.
2
Focusrite D2 and D3 Plug-Ins Guide
About www.avid.com
The Avid website (www.avid.com) is your best
online source for information to help you get the
most out of your Pro Tools system. The following
are just a few of the services and features available.
Product Registration Register your purchase
online.
Support and Downloads Contact Avid Customer
Success (technical support); download software
updates and the latest online manuals; browse the
Compatibility documents for system requirements;
search the online Knowledge Base or join the
worldwide Pro Tools community on the User
Conference.
Training and Education Study on your own using
courses available online or find out how you can
learn in a classroom setting at a certified Pro Tools
training center.
Products and Developers Learn about Avid
products; download demo software or learn about
our Development Partners and their
plug-ins, applications, and hardware.
News and Events Get the latest news from Avid or
sign up for a Pro Tools demo.
Chapter 1: Introduction
3
4
Focusrite D2 and D3 Plug-Ins Guide
Chapter 2: Installation and Authorization
Installing Plug-Ins for
Pro Tools
The installer for your plug-in can be downloaded
from the Avid Store (shop.avid.com) or through
your my.avid.com account. Plug-Ins can also be
purchased retail, in which case the included activation card provides the necessary information for
downloading, installing, and authorizing your
plug-in (www.avid.com/activation).
Authorizing Plug-Ins
Avid Pro Tools plug-ins are authorized using the
iLok USB Smart Key (iLok), manufactured by
PACE Anti-Piracy.
iLok USB Smart Key
For more information about Avid audio
plug-ins, visit www.avid.com/plugins.
To install a plug-in:
1
Download the installer for your computer platform from www.avid.com. After downloading,
make sure the installer is uncompressed (.dmg
on Mac or .ZIP on Windows).
2
If Pro Tools is running, quit Pro Tools.
3
Locate and double-click the plug-in installer
application.
4
Follow the on-screen instructions to complete
the installation.
5
When installation is complete, click Quit (Mac)
or Finish (Windows).
When you launch Pro Tools, you are prompted to
authorize your new plug-in.
An iLok can hold hundreds of licenses for all of
your iLok-enabled software. Once a license for a
given piece of software is placed on an iLok, you
can use the iLok to authorize that software on any
computer.
An iLok USB Smart Key is not supplied with
plug-ins or software options. You can use the
iLok included with certain Pro Tools systems
or purchase one separately.
Once you have purchased your software from the
Avid Store or entered your activation code online,
an authorization license for your software is posted
to your iLok account. Authorize your software by
downloading the license from iLok account to your
iLok USB Smart Key.
For more information, visit the iLok website
(www.iLok.com).
Chapter 2: Installation and Authorization
5
To download the license for your software to your
iLok:
If you don’t already have an iLok account, visit
www.ilok.com to sign up for one.
To remove a plug-in:
1
Choose Start > Control Panel.
2
Log in to your iLok.com account at
www.ilok.com.
2
Click Programs and Features.
3
3
Follow the online instructions to transfer the
license from your iLok account to your iLok
USB Smart Key.
Select the plug-in from the list of installed applications.
4
Click Uninstall.
5
Follow the on-screen instructions to remove the
plug-in.
1
Removing Plug-Ins
If you need to remove a plug-in from your
Pro Tools system, follow the instructions below
for your computer platform.
Mac OS X
To remove an AAX plug-in:
1
Locate and open the Plug-Ins folder on your
Startup drive (Library/Application Support
/Avid/Audio/Plug-Ins).
2
Do one of the following:
• Drag the plug-in to the Trash and empty the
Trash.
• Drag the plug-in to the Plug-Ins (Unused) folder.
To remove a TDM or RTAS plug-in:
1
Locate and open the Plug-Ins folder on your
Startup drive (Library/Application Support
/Digidesign/Plug-Ins).
2
Do one of the following:
• Drag the plug-in to the Trash and empty the
Trash.
• Drag the plug-in to the Plug-Ins (Unused) folder.
6
Windows
Focusrite D2 and D3 Plug-Ins Guide
Chapter 3: Focusrite D2
Focusrite D2 is a high-quality digital equalizer
plug-in for Pro Tools. Developed in cooperation
with Focusrite, the D2 is based on the highly-acclaimed Red Range 2™ dual EQ, designed by
Rupert Neve.
Focusrite D2 Configurations
D2 features include:
1–2 Band EQ
Up to six simultaneous bands of EQ, including:
high-pass, low-shelf, low-mid peak, high-mid
peak, high-shelf, and low-pass filters

 A highly accurate Cartesian graph that displays
EQ curves in real-time as EQ parameters are
adjusted
There are three configurations of the Focusrite D2
plug-in, each designed to use a different amount of
your system’s DSP.
This module uses the least DSP. You can use up to
two filters simultaneously, depending on which
you enable. The high-pass, low-shelf, and lowpass filters each utilize the entire module and cannot be used in combination with another filter. The
low-mid peak, high-mid peak, or high-shelf filters
can be used in combination with each other (up to
two bands total).
4-Band EQ
This module uses more DSP. You can use up to
four filters simultaneously. Unlike the 1–2 Band
EQ, any combination of filters can be engaged, up
to a total of four bands.
6-Band EQ
Focusrite D2
This module uses the most DSP. You can use up to
six filters simultaneously. By default, the low-pass
and high-pass filters are in Bypass mode when the
6-Band EQ is first opened.
Chapter 3: Focusrite D2
7
Adjusting Plug-In Parameters
Editing Parameters Using a Computer
Keyboard
You can adjust plug-in controls by dragging the
control’s slider or knob, or by typing a value into
the control’s text box. Additionally, some plug-ins
have switches that can be enabled by clicking on
them.
Some controls have text boxes that display the current value of the parameter. You can edit the numeric value of a parameter with your computer
keyboard.
To adjust a plug-in control:
If multiple plug-in windows are open, Tab and
keyboard entry remain focused on the plug-in that
is the target window.
1
Begin audio playback so that you can hear the
control changes in real time.
2
Adjust the controls of the plug-in for the effect
you want. Refer to “Editing Parameters Using a
Mouse” on page 8 and “Editing Parameters Using a Computer Keyboard” on page 8.
Closing the plug-in will save the most recent
changes.
Editing Parameters Using a Mouse
To change control values with a computer
keyboard:
1
Click the text box corresponding to the control
that you want to adjust.
2
To change the value, do one of the following:
• To increase a value, press the Up Arrow on your
keyboard. To decrease a value, press the Down
Arrow on your keyboard.
• Type the value.
You can adjust rotary controls by dragging horizontally or vertically. Parameter values increase as
you drag upward or to the right, and decrease as
you drag downward or to the left.
In fields that support values in kilohertz, typing “k” after a number value will multiply the
value by 1,000. For example, type “8k” to enter a value of 8,000.
3
Adjusting rotary controls
Keyboard Shortcuts
For finer adjustments, Control-drag (Windows)
or Command-drag (Mac) the control.

To return a control to its default value, Alt-click
(Windows) or Option-click (Mac) the control.

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Focusrite D2 and D3 Plug-Ins Guide
Do one of the following:
• Press Enter on the numeric keyboard to input the
value and remain in keyboard editing mode.
• Press Enter on the alpha keyboard (Windows) or
Return (Mac) to enter the value and leave keyboard editing mode.
To move forward through the different control fields, press the Tab key. To move backward, press Shift+Tab.
Editing Parameters Using a Scroll
Wheel
Some controls have text boxes that display the current value of the parameter. You can edit the numeric value of a parameter using a scroll wheel.
Output Level
Output Level allows you to adjust the overall output gain. The range of this control is from –18 dB
to +12 dB.
To change control values using a scroll wheel:
1
Click the text box corresponding to the control
that you want to adjust.
2
To increase a value, scroll up with the scroll
wheel. To decrease a value, scroll down with the
scroll wheel.
Toggling Switches
To toggle a switch:

Click the switch.
D2 Parameters
Input Level
Input Level allows you to attenuate signal input
level to the D2. The range of this control is from
–18 dB to +12 dB.
Output Level
When you use the D2 plug-in in stereo, each channel has its own separate output level knob. To adjust output levels for both channels simultaneously, select the Link button.
Meters
The D2’s high-resolution plasma-style meters indicate signal levels and detect clipping at the input,
algorithm, or output stage. When D2 is used in stereo, two meters appear, one for each channel.
A Clip Indicator is located above each meter. It indicates clipping by increasing its brightness as successive samples are clipped. Click the Clip Indicator to clear it. Alt-clicking (Windows) or Optionclicking (Mac) clears both channels when D2 is
used in stereo.
When you use D2 in stereo, each channel has its
own separate Input Level knob. To adjust input
levels for both channels simultaneously, select the
Link button, then drag either knob.
input Level
Meters (Stereo mode)
Chapter 3: Focusrite D2
9
Metering:
• Green = nominal levels.
• Yellow = pre-clipping at –6 below full scale
signal.
• Red = full scale signal (clipping).
The plug-in window includes a Clip LED that
lights red to indicate plug-in clipping. The
plug-in Clip LED follows Pro Tools settings
for clip indication. (For more information,
see the Pro Tools Reference Guide .)
The Cartesian Graph
The Cartesian Graph displays a visual representation of the current EQ settings. As you adjust the
parameters of any currently active filter, the Cartesian Graph will plot the changes to the EQ curve in
real-time. If you are using D2 in stereo, the Cartesian Graph displays the EQ curve for the right
channel in red and the left channel in blue.
EQ Filter Controls
Each of the six different EQ filters has its own controls and its own icon. The icons act as three-state
switches for enabling, disabling, or bypassing the
specific filter. The current state of a filter is indicated by its color:
• White = enabled. In this state the filter is active,
audible, and using available DSP resources.
• Black = disabled. In this state the filter is not using any DSP resources and has no effect on audio.
• Gray = bypassed. In this state the filter is not
active, but is still using available DSP resources.
The effect of the filter is not audible.
High-Pass Filter
The 18 dB/octave High-Pass Filter provides a
rotary control for adjusting the corner (cutoff)
frequency, variable from 20 Hz to 6.4 kHz.
High-Pass Filter
Cartesian Graph
Alt-clicking (Windows) or Option-clicking
(Mac) the Cartesian Graph resets all D2 parameters to their default settings. To reset parameters for both channels when in Stereo
mode, Alt-Shift-click (Windows) or OptionShift-click (Mac) the Cartesian Graph.
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Focusrite D2 and D3 Plug-Ins Guide
Low-Shelf Filter
High-Mid Peak Filter
The Low-Shelf Filter provides two rotary controls:
The upper rotary control adjusts the corner frequency, variable from 33 Hz to 460 Hz. The lower
rotary control adjusts the filter’s amplitude gain or
attenuation. Amplitude range is ±15 dB from
unity.
The High-Mid Peak Filter provides three rotary
controls. The upper rotary control adjusts the center frequency, variable from 120 Hz to 18 kHz.
The lower left rotary control adjusts the filter’s amplitude gain or attenuation. Amplitude range is
±15 dB from unity (utilizing a reciprocal curve for
both gain and attenuation). The lower right rotary
control adjusts filter “Q” which is variable from
0.7 to 4.0.
Low-Shelf Filter
Low-Mid Peak Filter
The Low-Mid Peak Filter provides three rotary
controls. The upper rotary control adjusts the center frequency, variable from 33 Hz to 6.4 kHz. The
lower left rotary control adjusts the filter’s amplitude gain or attenuation. Amplitude range is
±15 dB from unity (utilizing a reciprocal curve for
both gain and attenuation). The lower right rotary
control adjusts filter “Q” which is variable from
0.7 to 4.0.
High-Mid Peak Filter
Low-Mid Peak Filter
High-Shelf Filter
High-Shelf Filter
The High-Shelf Filter provides two rotary controls: The upper rotary control adjusts the corner
frequency, variable from 3.3 kHz to 18 kHz. The
lower rotary control adjusts the filter’s amplitude
gain or attenuation. Amplitude range is ±15 dB
from unity.
Chapter 3: Focusrite D2
11
Low-Pass Filter
The 18 dB/octave Low-Pass Filter provides a rotary control for adjusting the filter’s corner cutoff
frequency, variable from 100 Hz to 18 kHz.
Using D2 in Stereo
Because Focusrite D2 has a single set of Filter parameter knobs, when it is used in stereo, you must
select which channel, left or right, you want to edit.
Use the Left Channel, Right Channel, and Link
buttons to do this. These controls only appear
when D2 is used in stereo.
Low-Pass Filter
Enabling, Disabling and
Bypassing EQ Filters
You can enable, disable, or bypass specific EQ filters by clicking them.
To disable a filter:

Start key-click (Windows) or Control-click
(Mac) the EQ Filter icon. When disabled, the
icon is black.
To re-enable a filter:

Click the EQ filter icon. When enabled, the icon
is white.
To bypass a filter:

Click the EQ filter icon a second time. When
bypassed, the icon is grey.
If you are using all available bands of the 1–2
Band or 4–Band EQ and want to change filter types, you must disable one filter before
you can enable a different one.
12
Focusrite D2 and D3 Plug-Ins Guide
Left Channel, Right Channel, and Link buttons
Left Channel and Right Channel
Buttons
The Left Channel and Right Channel buttons are
used to select which channel is active for parameter editing.
Selecting the Left Channel button activates the left
channel for editing. Any changes made to EQ parameters will affect the left channel of the stereo
signal.
Selecting the Right Channel button activates the
right channel for editing. Any changes made to EQ
parameters will affect the right channel of the stereo signal.
Link Button
Selecting the Link button allows you adjust parameters for both channels simultaneously. By default,
Link mode is enabled so that you can easily maintain parity between the parameter settings for both
channels.
You can also use Link mode to help you maintain
a relative offset between parameters settings on the
two channels.
Maintaining an offset:
1
Deselect the Link button.
2
Select the desired channel button, left or right,
and adjust the parameters for that channel.
3
Select Link mode and adjust the same parameters for the opposite channel. D2 will maintain
the relative offset between the parameter settings for the two channels.
Alt-click (Windows) or Option-click (Mac)
while linking channels with offsets to copy
the parameters of the active channel to the
opposite channel (including input and
output levels).
Chapter 3: Focusrite D2
13
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Focusrite D2 and D3 Plug-Ins Guide
Chapter 4: Focusrite D3
Focusrite D3 is a high-quality dynamics processor
plug-in for Pro Tools. Developed in cooperation
with Focusrite, the D3 is based on the highly acclaimed Red Range 3™ dual mono/stereo compressor & limiter designed by Rupert Neve.
Focusrite D3 Configurations
The Compressor/Limiter defaults to the compressor being enabled and the limiter disabled.
To enable the limiter:
1
Disable the compressor by Start key-clicking
(Windows) or Control-clicking (Mac) its icon.
2
Click the Limiter icon.
There are two configurations of the real-time TDM
Focusrite D3 plug-in:
Compressor+Limiter. This configuration allows
you to use both the compressor and the limiter at
the same time. The Compressor+Limiter plug-in
requires twice as much DSP as the Compressor/Limiter.

Compressor/Limiter. This configuration allows
you to use either the compressor or the limiter—
but not both at the same time. The Compressor/Limiter plug-in uses half as much DSP as the
Compressor+Limiter. It is provided so that you can
conserve DSP, since you may not need both compression and limiting at the same time.

Limiter
Compressor
Compressor and Limiter icons
The D3 Compressor
The D3 compressor reduces the dynamic range of
audio signals that exceed a user-selectable threshold by a specific amount. This is accomplished by
reducing output levels as input levels increase
above the threshold.
The amount of output level reduction that D3 applies as input levels increase is referred to as the
compression ratio. This parameter is adjustable. If
you set the compression ratio to 2:1, for example,
for each 2 dB that the signal exceeds the threshold,
Focusrite D3
Chapter 4: Focusrite D3
15
the output will increase only by 1 dB. With a compression ratio of 4:1 for example, an 8 dB increase
in input will produce only a 2 dB increase in output.
The D3 Limiter
The D3 limiter operates as a fast-attack compressor with a high compression ratio. It does not attack instantaneously or look ahead in order to attack ahead of time, but instead uses a very fast, 1millisecond attack time. As such, the D3 is not a
“brick wall” limiter, but limits the overall dynamic
range of signals in a sonically-pleasing way.
this, when stereo processing occurs, there is no image shift when signal levels differ between the two
channels (since the composite control signal drives
processing for both channels).
Adjusting Plug-In Parameters
You can adjust plug-in controls by dragging the
control’s slider or knob, or by typing a value into
the control’s text box. Additionally, some plug-ins
have switches that can be enabled by clicking on
them.
To adjust a plug-in control:
Like the Compressor, the Limiter is activated
when the signal exceeds the user-selected threshold. The Limiter then compresses any signal above
the selected threshold down to the threshold limit
that you have set.
1
Begin audio playback so that you can hear the
control changes in real time.
2
Adjust the controls of the plug-in for the effect
you want. Refer to “Editing Parameters Using a
Mouse” on page 16 and “Editing Parameters
Using a Computer Keyboard” on page 17.
Side-Chain Processing
Compressors and limiters generally use the detected amplitude of the input signal as a control
source. Other signals can also be used as a control
source by using a key input. With de-essing, for
example, a frequency-modified version of the input signal is used as a trigger. This is known as
side-chain processing.
Side-chain processing allows the D3 compression
or limiting to be controlled by another independent
audio signal—typically another Pro Tools track. In
this way you can compress or limit one track’s audio using the dynamics of a different track’s audio.
Using the D3 Plug-In in Stereo
Closing the plug-in will save the most recent
changes.
Editing Parameters Using a Mouse
You can adjust rotary controls by dragging horizontally or vertically. Parameter values increase as
you drag upward or to the right, and decrease as
you drag downward or to the left.
Adjusting rotary controls
Keyboard Shortcuts
In stereo configurations, all D3 controls except the
Input Level affect both channels of the stereo signal. The D3’s RMS detector (which derives the
control signal that drives the dynamics processing)
uses a composite of the two channels. Because of
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Focusrite D2 and D3 Plug-Ins Guide
For finer adjustments, Control-drag (Windows)
or Command-drag (Mac) the control.

 To return a control to its default value, Alt-click
(Windows) or Option-click (Mac) the control.
Editing Parameters Using a Computer
Keyboard
Editing Parameters Using a Scroll
Wheel
Some controls have text boxes that display the current value of the parameter. You can edit the numeric value of a parameter with your computer
keyboard.
Some controls have text boxes that display the current value of the parameter. You can edit the numeric value of a parameter using a scroll wheel.
To change control values using a scroll wheel:
If multiple plug-in windows are open, Tab and
keyboard entry remain focused on the plug-in that
is the target window.
1
Click the text box corresponding to the control
that you want to adjust.
2
To increase a value, scroll up with the scroll
wheel. To decrease a value, scroll down with the
scroll wheel.
To change control values with a computer
keyboard:
1
Click the text box corresponding to the control
that you want to adjust.
Toggling Switches
2
To change the value, do one of the following:
To toggle a switch:
• To increase a value, press the Up Arrow on your
keyboard. To decrease a value, press the Down
Arrow on your keyboard.
• Type the desired value.
In fields that support values in kilohertz, typing “k” after a number value will multiply the
value by 1,000. For example, type “8k” to enter a value of 8,000.
3
Do one of the following:
• Press Enter on the numeric keyboard to input the
value and remain in keyboard editing mode.
• Press Enter on the alpha keyboard (Windows) or
Return (Mac) to enter the value and leave keyboard editing mode.

Click the switch.
D3 Parameters
Input Level
Input Level attenuates signal input level to the
compressor or limiter. The range of this control is
from –30 dB to 0 dB.
When you use the stereo version of the D3 plug-in,
each channel has its own separate Input Level
knob. To adjust input levels for both channels simultaneously, Shift-drag. Alt-Shift-clicking (Windows) or Option-Shift clicking (Mac) either Input
Level knob resets both channels to 0 dB.
To move forward through the different control fields, press the Tab key. To move backward, press Shift+Tab.
Input Level
Chapter 4: Focusrite D3
17
Output Level
Meters
Output Level adjusts the overall output gain. Because large amounts of compression can restrict
dynamic range, the Output Level knob is useful for
compensating for heavily compressed signals and
making up the resulting difference in level.
The meters indicate gain reduction (the top meter)
and output level (the bottom meter). The Gain Reduction meter indicates the amount of gain reduction in dB. The Output Level meter indicates the
output signal level in dB.
When you use the stereo version of the D3 plug-in,
this single knob controls the master output for both
channels. The range of this control is from –12 dB
of attenuation to +18 dB of gain.
In Stereo mode, two Output Level meters appear,
one for each channel. However, a single Gain Reduction meter is used for both channels, since the
D3’s RMS detector uses a composite control signal.
Output Level
External Key and Key Listen
A red Clip Indicator appears to the right of the output meter(s). Clicking on the Clip Indicator clears
it. Alt-clicking (Windows) or Option-clicking
(Mac) clears both channels when the plug-in is
used in stereo.
The side-chain is the split-off signal used by a
plug-in’s detector to trigger dynamics processing.
External Key lets you designate an external source
(known as the key input) for the side-chain, while
Key Listen lets you monitor the key input.
Meters
External Key
Key Listen
External Key and Key Listen toggles
Metering indicators:
• Green indicates nominal levels.
• Yellow indicates pre-clipping at –6 below full
scale.
• Red indicates a full scale signal (clipping).
See “Using the Side-Chain Input in Focusrite
D3” on page 21 for detailed information on
external side-chain processing.
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Focusrite D2 and D3 Plug-Ins Guide
The plug-in window includes a Clip LED that
lights red to indicate plug-in clipping. The
plug-in Clip LED follows Pro Tools settings
for clip indication. (For more information,
see the Pro Tools Reference Guide .)
D3 Compressor Controls
The Compressor icon, which represents a compression curve, acts as a three-state switch for enabling, disabling, or bypassing the compressor. Its
current state is indicated by the icon’s color.
To disable the compressor:

Start key-click (Windows) or Control-click
(Mac) the icon. When the compressor is disabled, the icon is black.
To re-enable the compressor:

Click the icon. When the compressor is enabled,
the icon is white.
Compressor icon
To bypass the compressor:
• White indicates enabled. In this state the compressor is active and using available DSP
resources.

• Black indicates disabled. In this state, the
compressor is not using DSP resources.
• Gray indicates bypassed. In this state the compressor is not active, but is still using available
DSP resources.
Click the icon a second time. When the compressor is bypassed, the icon is grey.
If you are using the Compressor/Limiter plug-in,
which allows you to use either the compressor or
the limiter (but not both simultaneously), you must
disable one module by Start key-clicking the icon
(Windows) or Control-clicking it (Mac) before
you can enable the other.
Ratio
Ratio sets the compression ratio. If the ratio is set
to 2:1 for example, it will compress changes in signals above the threshold by one half. The range of
this control is from 1.5:1 (very little compression),
to 10:1 (heavy compression, bordering on limiting).
Compressor controls
Ratio
Chapter 4: Focusrite D3
19
Threshold
Release
Threshold sets the threshold level. Signals that exceed this level will be compressed. Signals that are
below it will be unaffected. The range of this control is from 0 dB to –48 dB. A setting of 0 dB is
equivalent to no compression.
Release controls how long it takes for the compressor to be fully deactivated after the input signal
drops below the threshold level. In general, this
setting should be longer than the attack time and
long enough that if signal levels repeatedly rise
above the threshold, they cause gain reduction
only once. If the release time is too long, a loud
section of the audio material could cause gain reduction that persists through a soft section. The
range of this control is from 25 milliseconds to 2.5
seconds.
Threshold
Attack
Attack sets the compressor attack time. To use
compression most effectively, the attack time
should be set so that signals exceed the threshold
level long enough to cause an increase in the average level. This helps ensure that gain reduction
doesn’t decrease the overall volume. The range of
this control is from 1.0 ms to 150.0 ms.
Auto Release
Auto Release
Auto Release enables the automatic release function. In this mode the Release control has no effect
on release time. Instead, the D3 uses a release time
value that is program dependent and based on the
audio being processed.
Attack
Auto Release
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Focusrite D2 and D3 Plug-Ins Guide
D3 Limiter Controls
The Limiter icon, which represents a limiter curve,
acts as a three-state switch for enabling, disabling,
or bypassing the limiter. Its current state is indicated by the icon’s color:
If you are using the Compressor/Limiter plug-in,
which allows you to use either the compressor or
the limiter (but not both simultaneously), you must
disable one module by Start key-clicking the icon
(Windows) or Control-clicking it (Mac) before
you can enable the other.
• White indicates enabled. In this state, the limiter
is active and using available DSP resources.
Limit LED
• Black indicates disabled. In this state, the limiter
is not using DSP resources.
When lit, the Limit LED indicates that limiting is
being applied. When unlit, limiting is not being applied.
• Gray indicates bypassed. In this state, the limiter
is not active, but is still using available DSP
resources.
Limit LED
Threshold
Limiter controls
Limiter In/Out icon
This sets the threshold level. Signals that exceed
this level will be limited. Signals that are below it
will be unaffected. A setting of 0 dB is equivalent
to no limiting. The range of this control is from
–24 dB to 0 dB.
Threshold
To disable the limiter:

Start key-click (Windows) or Control-click
(Mac) the icon. When the limiter is disabled, the
icon is black.
To re-enable the limiter:

Click the icon. When the limiter is enabled, the
icon is white.
To bypass the limiter:

Using the Side-Chain Input in
Focusrite D3
The side-chain is the split-off signal used by a
plug-in's detector to trigger dynamics processing,
and is generally drawn internally from the input
signal. However, some plug-ins (such as the Focusrite D3) let you switch between internal and external side-chain processing.
Click the icon a second time. When the limiter
is bypassed, the icon is grey.
Chapter 4: Focusrite D3
21
With external side-chain processing, a plug-in's
detector is triggered by an external signal (such as
a separate reference track or audio source) known
as the key input.
Using a Key Input for External
Side-Chain Processing
To use a key input to trigger dynamics processing:
1
A typical use for this feature is to use a kick drum
track to gate and tighten up a bass track, or a
rhythm guitar track to gate another instrument.
Click the Key Input selector and select the input
or bus carrying the audio from the reference
track or external audio source.
External Key
External Key toggles external side-chain processing on or off. When this button is enabled, the
plug-in uses the amplitude of an external signal
(the key input) to trigger compression or limiting.
When this button is disabled, the plug-in uses the
amplitude of the input signal to trigger dynamics
processing.
External Key
Selecting a key input
2
Click External Key to activate external sidechain processing.
3
To listen to the key input that will be used to
control side-chain processing, click Key Listen
to enable it.
4
Begin playback. The plug-in uses the input or
bus that you chose as an external key input to
trigger its effect.
5
Adjust the plug-in’s Threshold control to finetune external key input triggering.
6
Adjust other controls to achieve the desired
effect.
Key Listen
Key Listen enables and disables auditioning of the
key input controlling the external side-chain. This
is useful for fine-tuning the compressor’s settings
to the key input.
Key Listen
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Focusrite D2 and D3 Plug-Ins Guide
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