Table of Contents
Related Manuals for miniDSP DDRC-24
Summary of Contents for miniDSP DDRC-24
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Page 1: User Manual
DDRC-24 LTRA COMPACT UDIO ROCESSOR WITH ® R IRAC ORRECTION ECHNOLOGY User Manual miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... - Page 2 Fixing mistake in the diagram of 2.1 setup 15 July 2016 Revised installation procedure 26 July 2016 Minor update to installation procedure 15 August 2016 miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice...
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Page 3: Table Of Contents
Mac OS X installation .......................... 14 3.2.1 DDRC-24 plugin installation ......................14 3.2.2 Dirac Live Calibration Tools (DLCT) installation ................15 2x4 HD to DDRC-24 upgrade ....................... 16 Dirac Live Licensing..........................17 3.4.1 License activation ........................17 3.4.2 License validation ........................18 3.4.3... - Page 4 10 Additional Information ..........................58 10.1 Specifications ............................. 58 10.2 Firmware upgrade ..........................59 10.2.1 Windows ............................ 59 10.2.2 Mac OS X ............................ 61 10.3 Troubleshooting ..........................62 miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice...
- Page 5 10.3.1 DDRC-24 plugin ........................... 62 10.3.2 Dirac Live Calibration Tool ......................63 10.4 Obtaining support ..........................64 miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice...
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Page 6: Important Information
Please read the following information before use. In case of any questions, please contact miniDSP via the support portal at minidsp.desk.com. System Requirements To configure the miniDSP audio processor, you will require a Windows PC or Apple Mac OS X computer with the following minimum specification: Windows ... - Page 7 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: ...
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Page 8: Product Overview
DSP audio processing functions on each output channel. This allows the DDRC-24 to be used for correction of a stereo signal, integration of one or two subwoofers, or to implement a combined two-way crossover and room correction processor. Combined with its selection of analog, optical digital, and asynchronous USB (up to 192 kHz) inputs, the miniDSP DDRC-24 offers an unprecedented level of audio processing performance for its size and price bracket. -
Page 9: How The Ddrc-24 Works
(DRC). The Dirac Live outputs are fed into a 2-in 4-out matrix mixer. The matrix mixer is what enables the DDRC-24 to be used in a number of different application scenarios. The outputs from the mixer are processed through a comprehensive set of DSP functions – crossover filters (high pass and low pass), parametric EQ, and individual gain and delay adjustments. -
Page 10: Hardware Connectivity
Be sure to take careful note of the channel numbering shown in this diagram and on the rear panel. miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 11: Usb
2.3 USB Connect the USB (Type B mini) port of the DDRC-24 to a free USB 2.0 port on your computer using the supplied cable. The USB connection is used for: Configuration with the DDRC-24 plugin and Dirac Live Calibration Tool for miniDSP, and ... -
Page 12: Software Installation And License Activation
Downloads link is visible from the dropdown menu at the top right of the website page: Navigate to the Dirac Series section and then to DDRC-24 Software. There you will find a single download containing all software. Download this file and unzip it on your computer. The folder containing the software has... -
Page 13: Windows Installation
Successful completion of step 4 is important. DLCT must not be running when you do step 4. If it does not complete properly, Dirac Live Calibration Tool will run but it will not recognize your DDRC-24. The message “1 File(s) copied” must be present to indicate successful completion. -
Page 14: Driver Installation
We recommend accepting the default installation location. Once the driver installation completes, click the Finish button. The Windows PC will not be able to communicate properly with the DDRC-24 if you did not have the DDRC-24 connected by USB and powered on when installed the driver. If that is the case, you will need to uninstall the driver, connect the DDRC-24, power it on, and run the installer again. -
Page 15: Dirac Live Calibration Tools (Dlct) Installation
Successful completion of step 4 is important. DLCT must not be running when you do step 4. If it does not complete properly, Dirac Live Calibration Tool will run but it will not recognize your DDRC-24. If there are any error messages in the window, quit DLCT and try again. -
Page 16: 2X4 Hd To Ddrc-24 Upgrade
DDRC-24 UPGRADE If you have purchased an upgrade to convert a miniDSP 2x4 HD to a DDRC-24, follow the steps below. (If you purchased a DDRC-24, you do not need to do anything on this page.) Update the firmware to the DDRC-24 version. The procedure is described in... -
Page 17: Dirac Live Licensing
DDRC-24 plugin (step 2 above). The email address used during license activation is not related to your user account on miniDSP.com. To activate and validate a Dirac Live license, you must create a separate account on the Dirac server using the form shown at left in step 3 above. -
Page 18: License Validation
If you purchase more than one miniDSP processor with Dirac Live, each will need to be activated with its unique serial number. For each additional processor, use the form shown on the right in step 3 above. 3.4.2 License validation Start the Dirac Live Calibration Tool For miniDSP program. -
Page 19: Configuring With The Ddrc-24 Plugin
The DDRC-24 processor is configured with the DDRC-24 plugin / user interface program. Configuration of the DDRC-24 using the plugin must be done prior to performing Dirac Live calibration. This section provides a summary of the plugin and how to use it. -
Page 20: Synchronizing With The Processor
4.1 S YNCHRONIZING WITH THE PROCESSOR Communication takes place over a USB connection. Ensure that the computer is connected to the DDRC-24 via USB. Then click on the Connect button: The first time you connect, or if you have made any changes to any data in the user interface, a dialog box will... -
Page 21: Key Features
Both inputs can be mixed to each output if desired, and the mix level can be set individually for each input. For more information, see page 45. miniDSP Ltd, Hong Kong / www.minidsp.com... -
Page 22: Outputs
The Dirac Live button turns Dirac Live processing on and off. This function can also be accessed with a remote control and from within DLCT: miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 23: Plugin Configuration Guide
On the Routing tab, set the matrix like this: After you have set up the DDRC-24 plugin, save your configuration to a file. Then quit the DDRC-24 plugin, start Dirac Live Calibration Tool, and run the Dirac Live calibration as described in sections 5 and 6. -
Page 24: Stereo Room Correction And Subwoofer Integration
After you have set up the DDRC-24 plugin, save your configuration to a file. Then quit the DDRC-24 plugin, start Dirac Live Calibration Tool, and run a Dirac Live calibration as described in sections 5 and 6. -
Page 25: Stereo Room Correction And Stereo Supporting Woofers/Fast
You may need to do measurements with Room EQ Wizard (or a similar program) to fine-tune your crossover settings. After you have set up the DDRC-24 plugin, save your configuration to a file. Then quit the DDRC-24 plugin, start Dirac Live Calibration Tool, and run a Dirac Live calibration as described in sections 5 and 6. -
Page 26: Stereo Room Correction And Two-Way Active Speaker
This is a typical high pass setting for the tweeters: After you have set up the DDRC-24 plugin, save your configuration to a file. Then quit the DDRC-24 plugin, start Dirac Live Calibration Tool, and run a Dirac Live calibration as described in sections 5 and 6. -
Page 27: Acoustic Measurement For Dirac Live
EASUREMENT FOR IRAC The Dirac Live Calibration Tool Stereo for miniDSP uses a set of measurements made in your listening room to calculate correction filters for the left and right channels. The measurements are made using the DDRC-24 processor and a miniDSP UMIK-1 measurement microphone. -
Page 28: Connections For Acoustic Measurement
Place the UMIK-1 microphone into the microphone stand. Position the computer and cabling so that there is enough freedom of movement to move the microphone into the needed locations. miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 29: Configuring For Measurement
Start Dirac Live Calibration Tool Stereo for miniDSP. Be sure to quit the DDRC-88 Utility program before starting Dirac Live Calibration Tool for miniDSP. Running the two programs at the same time will result in communication conflicts and odd behavior. -
Page 30: Sound System Tab
Click on the divider again to close the help pane. 5.3.1 Sound System tab The Sound System tab is preset for you, provided that you have your DDRC-24 and UMIK-1 connected to the computer via USB. Choose system configuration Preset to Stereo Speaker System. -
Page 31: Output & Levels Tab
If necessary, adjust Input gain or Output volume so that both channels are in the green. When done, click the Proceed button. miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 32: Running The Measurements
5.4.1 Listening environment The Dirac Live Calibration Tool Stereo for miniDSP presents two different listening environments as a visual guide to positioning the microphone for each measurement: Chair, for a single listening seat, and Sofa, for multiple listening seats. -
Page 33: Executing Measurements
With the microphone in place at the central location and pointed between the two speakers, click on the Start button. The DDRC-24 will generate a test signal, audible as a frequency sweep through the left speaker, then the right, and then the left again. While the measurement proceeds, the time-domain graph of the captured audio signal is displayed at the bottom of the measurement tab. -
Page 34: Viewing And Redoing Measurements
(Note: if you wish to change from the Chair to the Sofa listening environment, or vice versa, you will need to start a new project.) miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 35: Dirac Live Filter Design And Download
ILTER ESIGN AND OWNLOAD Once the full set of measurements has successfully been taken, Dirac Live Calibration Tool Stereo for miniDSP has the acoustical information it needs about your loudspeakers and listening room to create the correction filters. 6.1 W... - Page 36 Double-click on the graph to zoom back out to the previous zoom level, or click on the small “–” sign next to the zoom indicator at the top right of the display. miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice...
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Page 37: Designing Your Target Curve
“disconnected” channel tab over the top of the selected channel. 6.2 D ESIGNING YOUR TARGET CURVE The target curve is the desired in-room frequency response with the miniDSP DDRC-24 performing digital room correction. 6.2.1 The Auto Target When first viewing the Filter Design tab, an estimated target curve suitable for your speakers is shown as the red curve. -
Page 38: Editing The Target Curve
If the left and right channels are linked, the same target curve is used for both channels. To create separate target curves for the left and right channels, unlink the two channels as described above in Working with graphs. miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 39: Guidelines For Target Curve Design
In almost all cases, the left and right channels should remain linked for target curve adjustment, to ensure that both speakers produce the same response across the listening area. In certain unusual circumstances, miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 40: Saving And Loading Target Curves
Once you have a target curve set to your satisfaction, click on the Optimize button. The Dirac Live Calibration Tool Stereo for miniDSP may at this time contact the Dirac license server to verify its license, so you will need to be connected to the Internet. -
Page 41: Loading Filter Sets
Once a set of filters is loaded, they can be selected with a remote control. If a slot with no filters loaded is selected, Dirac Live simply plays through the signal without alteration. miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 42: Infrared Remote Control
Dirac Live processing on and off. The DDRC-24 can “learn” the control codes of your current remote if it supports one of the following remote control codes: ... -
Page 43: Usb Audio
8 USB A UDIO The miniDSP DDRC-24 accepts stereo PCM audio at sample rates of 44.1, 48, 88.2, 96, 176.4, and 192 kHz on its USB audio input. The same USB connector is used both for streaming audio and configuration. -
Page 44: Windows
If you are having an issue with inadequate output volume over USB playback, check the Volume tab. To set the DDRC-24 as the default output device, open the Windows Control Panel and navigate to the Audio Devices section. On the Output tab, select DDRC 2x4n and click on the “Set Default” button. Individual audio playback programs may allow the DDRC-24 to be selected independently of the system default. -
Page 45: Plugin Reference
-72 and +12 dB. To adjust the gain, right-click on the cross point and a gain control will appear. Adjust the gain with the slider, or by typing in the value directly, then click close. miniDSP Ltd, Hong Kong / www.minidsp.com... -
Page 46: Output Channels
Current Gain text box. The maximum gain setting is 12 dB, and the minimum gain setting is – 72 dB. (0 dB, the default, is unity gain or no change in level.) miniDSP Ltd, Hong Kong / www.minidsp.com... -
Page 47: Parametric Eq
To link a channel, select the other channel from the drop-down menu at the top left of the PEQ display, and click the Link checkbox. miniDSP Ltd, Hong Kong / www.minidsp.com... - Page 48 "lit". (Note that all other filters are still operational unless individually bypassed.) A filter will also have no effect if its gain is set to 0.0. miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice...
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Page 49: Crossover
The current channel is displayed in orange, with the others displayed in grey. Hovering the mouse over the curve brings up an overlay showing the frequency and the attenuation at that frequency. miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... - Page 50 To link a channel, select the other channel from the drop-down menu at the top left of the Xover display, and click the Link checkbox. miniDSP Ltd, Hong Kong / www.minidsp.com...
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Page 51: Compressor
Each channel can be inverted in polarity, and individually muted. When either of these options is selected, the visual indicator on the button is "lit": miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 52: Time Delay
Note: The Dirac Live analysis algorithm also sets the time delay on the left and right channel. The time delay on the output channels should be used to time-align drivers (in the case of a two-way loudspeaker) and to optimize subwoofer integration (when the DDRC-24 is being used to drive one or more subwoofers). 9.4 C USTOM BIQUAD PROGRAMMING Custom biquad programming is available in the PEQ and Crossover blocks. -
Page 53: Using Custom Biquad Programming
This example illustrates the correct file format: biquad1, b0=0.998191200483864, b1=-1.9950521500467384, b2=0.996920046761057, a1=1.9950521500467384, a2=-0.9951112472449212, biquad2, b0=0.999640139948623, b1=-1.9981670485581222, biquad3, biquad4, biquad10, b0=1.0010192374642126, b1=-1.9950555192569264, b2=0.9940580112181501, a1=1.995060938714333, a2=-0.9950718292249559 miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 54: Biquad Design Software
It includes the ability to automatically generate a bank of parametric EQ biquads based on a measurement. These coefficients can be saved to a file from REW and loaded directly into a PEQ bank in a miniDSP plugin. Room EQ Wizard can be downloaded here: ... -
Page 55: Working With Configurations
(as long as the Synchronize Config button is selected). The configuration contained in the miniDSP hardware unit cannot be uploaded back to the computer. Therefore, you must save your configuration to a file if you wish to recover from any changes you make while in offline mode. -
Page 56: Saving And Loading Configurations
Each configuration in the DDRC-24 plugin corresponds to the same-numbered filter set configured in Dirac Live Calibration Tool. So, if the remote control or front panel is used to select preset 1, then the DDRC-24 configuration 1 is loaded, as well as Dirac Live filter set 1. -
Page 57: Restoring To Defaults
9.6 K EYBOARD SHORTCUTS The DDRC-24 plugin supports the use of the keyboard for many operations. The Tab key moves the focus from the current user interface element to the next. A blue-grey surrounding box usually indicates the user interface element with the focus. Shift-Tab moves the focus in the opposite direction. -
Page 58: Additional Information
“Learning remote” capabilities (NEC, Philips, Sony) Power supply 12 VDC single supply @ 300mA, 2.1 mm center-positive Dimensions (H x W x D) 27 x 119 x 107 mm miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 59: Firmware Upgrade
DDRC-24 MCU firmware to enable new features. To upgrade the MCU firmware, first download and install the latest version of the DDRC-24 plugin from the User Downloads section of the miniDSP website. - Page 60 You will get a progress bar as upgrade proceeds: Once the firmware upgrade completes, you will see a message that the upgrade completed successfully: Click on Exit. That’s it! You’re done. You can now use your DDRC-24 with the new functionality. miniDSP Ltd, Hong Kong / www.minidsp.com...
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Page 61: Mac Os X
Tab key after typing the first two characters of any filename, to activate auto-completion. Download the latest software for the DDRC-24 from the User Downloads area of the minidsp.com website. Double-click on it to unzip it. Assuming that you have placed it into the Downloads folder on your Mac, you will... -
Page 62: Troubleshooting
The Adobe Air environment may require a version update. Download the latest version from http://get.adobe.com/air/. Check that the USB cable to the DDRC-24 is firmly connected DDRC-24 plugin cannot connect Reset the processor by power-cycling the unit. Check the cabling from your source. - Page 63 Make sure that you quit DLCT before System tab doing it. Check that the USB cable to the DDRC-24 is firmly connected. Check that you do not have any other program running that is attempting to communicate with the DDRC-24, such as the DDRC-24 plugin.
- Page 64 DDRC-24, such as the DDRC-24 plugin. 10.4 O BTAINING SUPPORT 1. Check the forums on miniDSP.com to see if this issue has already been raised and a solution provided. 2. Contact miniDSP via the support portal at minidsp.desk.com with: a.