miniDSP DDRC-88A User manual

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DDRC-88A
8-CHANNEL AUDIO PROCESSOR
WITH DIRAC LIVE®TECHNOLOGY
AND OPTIONAL UPGRADE FOR BASS MANAGEMENT AND CROSSOVER
User Manual

miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice 2
Revision history
Revision
Description
Date
2.3
Updated for Dirac Live 2/3, DiracLive documentation
moved to separate miniDSP Dirac Live User Manual. (See
the DDRC-88A User Manual Legacy Support version for
earlier change history.)
30 June 2020
2.4
Updated support link
6 July 2020
SUPPORTED OS
If you are unable to run the above versions of the Windows or macOS operating system,
you will need to use the original version of Dirac Live (“Dirac Live 1”) with your DDRC-88A
processor. Please refer to the DDRC-88A User Manual Legacy Support version.
Note: Use of Dirac Live with macOS Mojave and Catalina requires some manual
workarounds, which are documented in this manual.

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TABLE OF CONTENTS
Important Information........................................................................................................................................ 5
1Product Overview ......................................................................................................................................... 7
1.1 Typical system configurations..............................................................................................................................7
1.2 Dirac Live.............................................................................................................................................................9
2Hardware Connectivity ............................................................................................................................... 10
2.1 Analog input and output....................................................................................................................................10
2.2 DC Power ..........................................................................................................................................................11
2.3 USB ...................................................................................................................................................................11
3Software Installation................................................................................................................................... 12
3.1 Do you need a firmware upgrade?.....................................................................................................................12
3.2 Windows 10 ......................................................................................................................................................13
3.2.1 Download and install the DiracLive application..........................................................................................13
3.2.2 Download the miniDSP software ...............................................................................................................13
3.2.3 Install the miniDSP software......................................................................................................................14
3.3 macOS 10.14 Mojave and 10.15 Catalina ...........................................................................................................15
3.3.1 Download and install the DiracLive application..........................................................................................15
3.3.2 Download the miniDSP software ...............................................................................................................15
3.3.3 Install the miniDSP software......................................................................................................................16
4The DDRC-88BM Plugin............................................................................................................................... 17
4.1 Plugin user interface –basic mode.....................................................................................................................17
4.2 Master control...................................................................................................................................................18
4.3 Configuration/filter set selection .......................................................................................................................18
4.4 Dirac Live information .......................................................................................................................................19
4.5 Start Dirac Live Software....................................................................................................................................19
5Dirac Live Calibration .................................................................................................................................. 20
6Using the DDRC-88A Audio Processor......................................................................................................... 21
6.1 Configuring source equipment...........................................................................................................................21
6.1.1 Level trims ................................................................................................................................................21
6.1.2 Bass management.....................................................................................................................................21
6.1.3 Delays/speaker distance............................................................................................................................21
6.1.4 Room correction and EQ ...........................................................................................................................21
6.1.5 Other processing.......................................................................................................................................21
6.2 Front panel........................................................................................................................................................22
6.2.1 Status indicators .......................................................................................................................................22
6.2.2 Front panel controls..................................................................................................................................22
6.3 Infrared remote control.....................................................................................................................................23
6.3.1 miniDSP remote........................................................................................................................................23
6.3.2 Apple remote............................................................................................................................................23
6.3.3 Programming a third-party remote............................................................................................................24
7Gain Structure............................................................................................................................................. 25
7.1 Gain structure overview ....................................................................................................................................25
7.2 Choosing gain structure settings ........................................................................................................................26
7.2.1 To change input sensitivity........................................................................................................................28
7.2.2 To change output gain...............................................................................................................................28

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7.3 Optimizing gain structure ..................................................................................................................................29
7.3.1 Procedure for optimizing output gain........................................................................................................29
7.3.2 To increase output gain.............................................................................................................................30
7.3.3 To reduce output gain...............................................................................................................................30
8Enhanced/Bass Management Mode ........................................................................................................... 31
8.1Plugin user interface –enhanced/bass management mode................................................................................31
8.2 Signal flow.........................................................................................................................................................32
8.3 Plugin design/configuration guide......................................................................................................................33
8.4 Connecting and configurations ..........................................................................................................................34
8.4.1 Connection options...................................................................................................................................34
8.4.2 More about configurations........................................................................................................................35
8.4.3 Selecting a configuration...........................................................................................................................35
8.4.4 Saving and loading configurations .............................................................................................................35
8.4.5 Relationship with Dirac Live.......................................................................................................................36
8.4.6 Restoring to defaults.................................................................................................................................36
8.5 Signal processing tabs........................................................................................................................................37
8.6 LFE Mgt.............................................................................................................................................................37
8.7 Routing..............................................................................................................................................................39
8.8 Mixer.................................................................................................................................................................39
8.9 Outputs.............................................................................................................................................................41
8.9.1 Channel label ............................................................................................................................................41
8.9.2 Gain control and level monitoring .............................................................................................................41
8.9.3 Parametric EQ...........................................................................................................................................42
8.9.4 Crossover settings.....................................................................................................................................44
8.9.5 Time delay ................................................................................................................................................45
8.9.6 Invert and mute ........................................................................................................................................45
9Additional Information ............................................................................................................................... 46
9.1 Balanced wiring tips...........................................................................................................................................46
9.1.1 Phoenix terminal blocks ............................................................................................................................46
9.1.2 XLR adapters.............................................................................................................................................46
9.1.3 RCA adapters ............................................................................................................................................46
9.2 Specifications ....................................................................................................................................................47
9.3 Main I/O board firmware update.......................................................................................................................48
9.3.1 Prepare for installation..............................................................................................................................48
9.3.2 Update the main I/O board firmware - WIndows.......................................................................................50
9.3.3 Update the main I/O board firmware - Mac...............................................................................................52
9.3.4 Restore the connectors and close up.........................................................................................................54
9.4 MCU Firmware update ......................................................................................................................................55
9.4.1 Windows...................................................................................................................................................55
9.4.2 Mac OS X...................................................................................................................................................57
9.5 Activating enhanced/bass management mode...................................................................................................59
9.6 Troubleshooting ................................................................................................................................................60
9.7 Obtaining support .............................................................................................................................................61

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IMPORTANT INFORMATION
Please read the following information before use. In case of any questions, please contact miniDSP via the
support portal at support.minidsp.com.
System Requirements
To configure your DDRC-88A audio processor, you will require a Windows or Apple Mac computer with the
following minimum specification:
Windows
•Microsoft• ® Windows® 10, latest version with all updates
•Intel Pentium III or later, AMD Athlon XP or later
•2 Gigabytes (GB) of RAM or higher
•Keyboard and mouse or compatible pointing device
•Two free USB 2.0 ports
Mac OS X
•macOS 10.14 Mojave or 10.15 Catalina, latest version with all updates
•Intel-based Mac with 1 GHz or higher processor clock speed
•2 Gigabytes (GB) of RAM or higher
•Keyboard and mouse or compatible pointing device
•Two free USB 2.0 ports
Disclaimer/Warning
miniDSP cannot be held responsible for any damage that may result from the improper use or incorrect
configuration of this product. Please read this manual carefully to ensure that you fully understand how to
operate and use this product, as incorrect use or use beyond the parameters and ways recommended in this
manual have the potential to cause damage to your audio system.
Please also note that many of the questions we receive at the technical support department are already
answered in this User Manual and in the online application notes on the miniDSP.com website. So please take
the time to carefully read this user manual and the online technical documentation. And if an issue arises with
your unit, please read through the Troubleshooting section first. Thank you for your understanding!
Warranty Terms
miniDSP Ltd warrants this product to be free from defects in materials and workmanship for a period of one
year from the invoice date. Our warranty does not cover failure of the product due to incorrect connection or
installation, improper or undocumented use, unauthorized servicing, modification or alteration of the unit in any
way, or any usage outside of that recommended in this manual. If in doubt, contact miniDSP prior to use.
FCC Class B Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
•This device may not cause harmful interference.

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•This device must accept any interference received, including interference that may cause undesired
operation.
Warning: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment does cause harmful interference to radio
or television reception, which can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
•Consult the dealer or an experienced radio/TV technician for help.
Notice: Shielded interface cable must be used in order to comply with emission limits.
Notice: Changes or modification not expressly approved by the party responsible for compliance could void the
user’s authority to operate the equipment.
CE Mark Statement
The DDRC-88A has passed the test performed according to European Standard EN 55022 Class B.
A Note on this Manual
This User Manual is designed for reading in both print and on the computer. If printing the manual, please print
double-sided. The embedded page size is 8 ½” x 11”. Printing on A4 paper will result in a slightly reduced size.
For reading on the computer, we have included hyperlinked cross-references throughout the manual. In
addition, a table of contents is embedded in the PDF file. Displaying this table of contents will make navigation
much easier:
•In Adobe Reader on Windows, click
on the “bookmarks” icon at the left.
The table of contents will appear on
the left and can be unfolded at each
level by clicking on the “+” icons.
•In Preview on the Mac, click on the
View menu and select Table of
Contents. The table of contents will
appear on the left and can be
unfolded at each level by clicking on
the triangle icons.

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1PRODUCT OVERVIEW
Thank you for purchasing a miniDSP DDRC-88A audio processor powered by Dirac Live®, the world’s premier
room correction solution. We are delighted to offer you this software and hardware combination, the fruit of
extensive research and development and years of experience in sound system tuning.
The DDRC-88A is an 8-channel digital audio signal processor (DSP) running the Dirac Live® room correction
algorithm. The onboard floating-point SHARC processor provides time and frequency correction of a 7.1
monitoring, home theater or multichannel audio system. Inputs and outputs are analog, available as both single-
ended signals connected via RCA jacks, and as balanced signals via Phoenix terminal blocks.
The DDRC-88A is a member of the miniDSP Dirac Series of audio processors. Deploying a DDRC-88A will:
•Improve imaging and immersion
•Improve clarity of music and dialog
•Produce a tighter bass
•Reduce listening fatigue
•Remove resonances and room modes
The DDRC-88A can be used anywhere an 8-channel room correction processor is required, such as in home
theaters, recording and mastering studios, performance venues, places of worship, and so on. An optional
enhanced/bass management software upgrade provides additional advanced functionality such as bass
management, active crossovers, and multi-sub configuration.
1.1 TYPICAL SYSTEM CONFIGURATIONS
The DDRC-88A is inserted between line-level analog sources and power amplification. In a typical home theater
application, line-level signal to the DDRC-88A is produced by an A/V receiver or processor with one or more
source devices connected, and the amplification is typically a multichannel power amplifier. A source such as a
Blu-ray player with multichannel analog outputs can instead be connected directly to the DDRC ‑ 88A.

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In studio or sound reinforcement applications, the DDRC-88A is typically connected between a mixing console
and power amplification, as shown below. Individual channels can be set for either full-range or subwoofer
operation.
In its enhanced mode of operation, the DDRC-88A is capable of a number of other signal processing functions,
such as bass management and active crossovers. The diagram below illustrates an application in which the
DDRC-88A implements active crossovers for the left, right and center speakers, as well as managing two
subwoofers. Where necessary, additional units can be used to attain the necessary number of output channels.
The DDRC-88A can also be used for multi-room/multi-zone correction with a stereo source. See the application
note on our website, Multi-zone DRC with the DDRC-88A Dirac Live® processor.
Computer connectivity is used to perform acoustic measurements and generate digital room correction filters.
Up to four sets of correction filters can be stored on the DDRC-88A processor and recalled from the front panel
or via an infrared remote. Once the processor is fully configured, the computer is no longer needed.

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1.2 DIRAC LIVE
The DDRC-88A processor executes Dirac Live® digital room correction, from Dirac Research. Dirac Live’s mixed-
phase filtering technology will improve the imaging of your system, minimize the effects of room modes and
resonances, and improve dynamics and clarity.
To accomplish its remarkable improvement in listening quality, the DiracLive application steps you through the
procedure for taking measurements around your listening area. Dirac Live® employs a sophisticated analysis
algorithm to make the optimal correction across the whole listening area, not just at a single point. The user has
full control over the target frequency response. Measurements are taken with a calibrated acoustic
measurement microphone, the miniDSP UMIK-1.
1
In addition to correcting magnitude response, Dirac Live® corrects the system’s impulse response, which reflects
how the system responds to a sharp transient such as a drumbeat. Reflections, diffraction, resonances,
misaligned drivers, and so on, all combine to smear out the transient. Correcting the impulse response makes
the speaker in the room behave much more like an ideal loudspeaker. The impulse response is a critical factor
for accurate sound-staging, clarity and bass reproduction.
Dirac Live calibration is described in the separate miniDSP Dirac Live User Manual.
1
A UMIK-1 is included in the standard purchase price of the DDRC-88A processor.

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2HARDWARE CONNECTIVITY
All connections to the DDRC-88A are made on the rear panel.
2.1 ANALOG INPUT AND OUTPUT
Up to eight channels can be connected to the DDRC-88A. Be sure to take careful note of the channel numbering:
On the input side, it is very strongly recommended that all connections be of the same type –i.e. balanced or
unbalanced. The Dirac Live algorithm equalizes levels on all channels, and a mixture of balanced and unbalanced
connections on the input side will require special gain adjustment steps after Dirac Live calibration.
On the output side, a mixture of balanced and unbalanced connections can be used if desired. Doing so may
necessitate additional work to check and adjust system gain structure. For more information on gain structure,
see Gain structure starting on page 25.
Unbalanced connections are made directly
to the RCA jacks.
Balanced connections are made by
connecting bare wire ends to the push-in
Phoenix terminal blocks. For advice on
using these, see Balanced wiring tips on
page 46.

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2.2 DC POWER
Fit the supplied IEC cable to the 12 VDC power supply. Plug the AC mains plug into the power outlet, and then
plus the DC connector into the +12VDC socket on the rear panel of the DDRC-88A.
Apply power to the DDRC-88A only after all analog input and output connections have been made. The
DDRC-88A uses little power and can be left powered on.
If powered on and off, the following turn-on/turn-off sequence is recommended:
•On: Power on line-level equipment, including the DDRC-88A, then turn on power amplification.
•Off: Turn power amplification off, then power off line-level equipment, including the DDRC-88A.
2.3 USB
To configure the DDRC-88A using the DiracLive application:
•Connect the USB port of the DDRC-88A to a USB 2.0 port on your computer using the supplied cable.
•Connect a miniDSP UMIK-1 to a second USB port on your computer.
Note: the miniDSP UMIK-1 is the recommended and supported measurement microphone for use with the
DDRC-88D and the DiracLive application. miniDSP cannot provide support for use of other microphones.

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3SOFTWARE INSTALLATION
The DDRC-88A is configured with software running on a PC or Mac. There are two sets of software to download
and install, from live.dirac.com and from miniDSP.com.
3.1 DO YOU NEED A FIRMWARE UPGRADE?
When you receive your DDRC-88A, check the rear panel. If it has a green label marked “V2.2”, then you do not
need to upgrade any firmware prior to proceeding to install the software.
If you do not have a green label marked “V2.2”, then you must upgrade the internal firmware. Follow these
steps:
1. Install the DDRC-88BM plugin as described on following pages.
2. Upgrade the main I/O board firmware. See Section 9.3 starting on page 48.
3. Upgrade the SHARC daughterboard firmware. See page 55 for Windows and page 57 for Mac.
4. Install the DiracLive application.
You must update all firmware and software for the DDRC-88A to function correctly afterwards.
This applies whether or not you are using the plugin in enhanced/bass management mode. You can
not do a partial update.
If you were previously using the DDRC-88 Utility, we strongly recommend that you uninstall it
after completing the upgrade to avoid the possibility of accidentally running it and corrupting the
DSP code (which can potentially cause damage to your system).

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3.2 WINDOWS 10
This section describes software download and installation for Windows 10.
The software described in this section runs on the latest version of Windows 10 only. Other versions
of Windows are not supported by the current version of Dirac Live. If you are running an
unsupported version of Windows, refer to the DDRC-88A User Manual Legacy Support version.
3.2.1 Download and install the DiracLive application
Download the DiracLive application for Windows 10 from https://live.dirac.com/download/.
Double-click on the downloaded installer to run it. It will have a name like DiracLive v3.0.0 Setup Windows.exe.
We recommend that you accept the default installation settings. Do not run the application yet.
3.2.2 Download the miniDSP software
If you purchased your processor directly from miniDSP, your software will be available from the User Downloads
section of the miniDSP website when your order ships. To access the download, you will need to be logged into
the website with the account you created when purchasing.
If you purchased your processor from a miniDSP dealer, you will receive a coupon together with the product.
Redeem this coupon at the link below:
•https://www.minidsp.com/support/redeem-coupon
The User Downloads link is visible from the dropdown menu at the top right of the website:
Navigate to the Dirac Series section then to the DDRC-88A / DDRC-88D Software section. Download the zip file
under the heading DDRC-88A –Dirac 3.0 Build.
After downloading, unzip the file (right-click and select “Extract All...”). The unzipped download has a name like
DDRC-88-BM_v2_3_Dirac2. (The version number embedded in the folder name may be different.)

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3.2.3 Install the miniDSP software
3.2.3.1 Possible Windows installation issues
The miniDSP software requires that a number of other frameworks be installed for it to work. These packages
should be installed automatically, but you can manually install them if you receive an error message that
required software is missing.
•Microsoft .NET framework (version 3.5 or later)
•Latest version of Adobe Air
•Microsoft Visual C++ 2010 Redistributable Package: for x86 (32-bit Windows) or x64 (64-bit Windows).
3.2.3.2 Install the plugin
1. Navigate to the Plugins folder of the software download and then to the Windows folder.
2. Double-click on the plugin installer to run it. It will be named DDRC_88_BM_v2_3.exe. (The version number
in the filename may be different.) We recommend that you accept the default installation settings.
Note: the first time you run the DDRC-88A plugin and the DiracLive application, you may see a Windows Firewall
warning such as the one below. Ensure that “Private networks...” is checked and “Public networks...” is not
checked. Then click on “Allow access.” This warning dialog may appear more than once.

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3.3 MACOS 10.14 MOJAVE AND 10.15 CATALINA
This section describes software download and installation for MacOS 10.14 Mojave and 10.15 Catalina.
This software described in this section runs on macOS 10.14 Mojave and 10.15 Catalina only. Other
versions of OS X / macOS are not supported by the current version of Dirac Live. If you are running an
unsupported version of OS X / macOS, refer to the DDRC-88A User Manual Legacy Support version.
3.3.1 Download and install the DiracLive application
Download the DiracLive application for macOS from https://live.dirac.com/download/.
Double-click on the downloaded file to unzip it. Then double-click on the unzipped installer file to run it. It will
have a name like DiracLive v3.0.0 Setup Darwin.app. We recommend that you accept the default installation
settings. Do not run the application yet.
3.3.2 Download the miniDSP software
If you purchased your processor directly from miniDSP, your software will be available from the User Downloads
section of the miniDSP website when your order ships. To access the download, you will need to be logged into
the website with the account you created when purchasing.
If you purchased your processor from a miniDSP dealer, you will receive a coupon together with the product.
Redeem this coupon at the link below:
•https://www.minidsp.com/support/redeem-coupon
The User Downloads link is visible from the dropdown menu at the top right of the website:
Navigate to the Dirac Series section then to the DDRC-88A / DDRC-88D Software section. Download the zip file
under the heading DDRC-88A –Dirac 3.0 Build.
After downloading, unzip the file (right-click and select “Extract All...”). The unzipped download has a name like
DDRC-88-BM_v2_3_Dirac2. (The version number embedded in the folder name may be different.)

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3.3.3 Install the miniDSP software
3.3.3.1 Possible Mac installation issues
If double-clicking on the installer brings up a message that the installer cannot run, use this alternate method:
1. Right-click on the installer (or click while holding the Control key).
2. Move the mouse over the “Open With” item and then click on “Installer (default).”
3. The following window will appear. Click on “Open.”
3.3.3.2 Install the plugin
1. Navigate to the Plugins folder of the software download and then to the Mac folder.
2. The installer is named DDRC-88-BM_v2_3.pkg. (The version number in the filename may be different.) To
run it, double-click on it, or right-click and open as described above. We recommend that you accept the
default installation settings.
3. To run the plugin, locate it in the Applications -> miniDSP folder and double-click on it. To make it easier to
run in future, right-click on its dock icon and select Options -> Keep in Dock.
3.3.3.3 Enable file sharing for device discovery
To enable device discovery, open System Preferences, go to Sharing, then
enable File Sharing as shown at right.
Notes:
a) This step is not always necessary and may depend on your Mac’s
configuration or your home network setup.
b) If you wish, you can turn File Sharing off again after completing your
Dirac Live calibration.

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4THE DDRC-88BM PLUGIN
The DDRC-88BM plugin is the software program that interfaces with the DDRC-88A for all control functions
except for Dirac Live calibration. It can operate in two modes:
•Basic mode. Dirac Live is enabled but the optional bass management and crossover functionality is not.
•Enhanced/bass management mode. Dirac Live is enabled as well as bass management and crossover
functionality. See Section 8, Enhanced/Bass Management Mode for further information on this functionality.
If you purchase a DDRC-88A in basic mode and later upgrade to enhanced/bass management mode, you will
need to perform the upgrade procedure described on page 59.
Be sure to quit the DiracLive application before pressing the Connect button in the DDRC-88BM
plugin. This avoids any possible communication conflicts.
4.1 PLUGIN USER INTERFACE –BASIC MODE
Upon starting the plugin, the main user interface appears. The screenshot below shows the user interface with
the key areas highlighted.
At the top of the screen are a set of menus and buttons, which are described on following pages. Below that, on
the Dirac tab, is a display of the Dirac Live parameters. This tab is active in both basic and enhanced/bass
management modes.
The four other tabs (“LFE Mgt,” “Routing,” etc) are not active in basic mode. They can be viewed when the
plugin is offline (see next page) in order to provide you with a preview of the enhanced/bass management
functionality.

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4.2 MASTER CONTROL
The DDRC-88BM plugin can communicate with the processor using either USB or over the network. For USB
communication, connect the DDRC-88A to a USB 2.0 port on your computer. Then click on the Connect button:
If you are running the plugin in enhanced/bass management mode, a dialog box with additional connection
options may appear. See page 34.
For networked communication with the processor, a miniDSP WI-DG Wifi/Ethernet to USB bridge must be used
together with the IP Address and Auto fields. See the Wi-DG User Manual for details.
If connection is successful, the Connect button will change to a green tick as shown above. For the sake of
brevity, this state is referred to as “online” whereas the earlier state with the circular arrows is referred to as
“offline.” In addition, the Master Volume field will display the current volume setting:
When the plugin is online, the Mute button disables all audio output:
The Dirac Live button turns Dirac Live filtering on and off. (A Dirac Live correction filter must have been loaded
into the currently selected configuration for this to work.)
4.3 CONFIGURATION/FILTER SET SELECTION
Once correction filters have been loaded into the DDRC-88A, the four configuration selection buttons can be
used to select between them.
If the plugin is operating in enhanced/bass management mode, these buttons also select the processing data for
the four other tabs (“LFE Mgt,” “Routing,” etc). Because these different configurations contain data that has
been already loaded into the flash memory of the hardware unit, they are also often referred to as “presets.”
Configuration/preset selection can also be done with the front panel encoder or an infrared remote control –
see Section 6, Using the DDRC-88A Audio Processor.
By default, configuration 1 is selected:

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4.4 DIRAC LIVE INFORMATION
In basic mode, the only active tab in the interface is Dirac. Dirac Live calibration is performed with the separate
DiracLive application, as described in the miniDSP Dirac Live User Manual. Once calibration has been performed,
you can quit DiracLive and run the plugin to view Dirac Live delay and gain settings and real-time levels.
This tab displays the gains and delays of the Dirac Live filters loaded into the DDRC-88A. (The plugin must be
online to display them.) These gains and delays were calculated by DiracLive during its Optimize phase and
cannot be changed by the user –they are “read only.” Here is an example:
Note that the displayed gains and delays are applied even when Dirac Live filtering is turned off. (In order to pass
audio through without gain and levels adjustment, you will need to leave an empty slot on the Export tab of the
DiracLive application.)
The Input and Output columns display the current signal level at the inputs and outputs of the Dirac Live
processing block.
The button is used to turn Dirac Live processing on and off.
4.5 START DIRAC LIVE SOFTWARE
The Start Dirac Live Software button starts the separate DiracLive application. When it is pressed, the DDRC-
88BM plugin will disconnect from the DDRC-88A processor and then start up DiracLive.
You must start the DiracLive application from within the DDRC-88BM plugin using the Start Dirac
Live Software button. If you open the DiracLive application by itself, it will not be able to detect the
DDRC-88A processor.

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5DIRAC LIVE CALIBRATION
Dirac Live calibration with the miniDSP DDRC-88A is described in the separate miniDSP Dirac Live User Manual. It
can be downloaded from the DDRC-88A product page on our website.
Be sure to start the DiracLive application from within the DDRC-88BM plugin using the Start Dirac
Live Software button. If you open the DiracLive application by itself, it will not be able to detect the
DDRC-88A processor.