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Summary of Contents for miniDSP DDRC-24
- Page 1 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 UPPORTED 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-24 processor. Please refer to the DDRC-24 User Manual Legacy Support version.
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Page 3: Table Of Contents
Download and install the DiracLive application ................13 3.2.2 Download the miniDSP software ....................13 3.2.3 Install the miniDSP software ....................... 14 2x4 HD to DDRC-24 upgrade ....................... 15 Configuring with the DDRC-24 Plugin......................16 Synchronizing with the processor ....................... 17 Key features ............................18 4.2.1 Master control .......................... - Page 4 Trouble-shooting playback issues ....................... 45 Firmware upgrade ..........................46 9.3.1 Windows ............................ 46 9.3.2 macOS / OS X ..........................48 Obtaining support ..........................50 miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice...
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Page 5: 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 the miniDSP audio processor, you will require a Windows PC or Apple Mac OS X computer with the following minimum specification: Windows •... - Page 6 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 7: 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 8: Dirac Live
1.2 D IRAC The DDRC-24 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. -
Page 9: 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 10: Usb
2.3 USB Connect the USB (Type B mini) port of the DDRC-24 to a free USB 2.0 port of your computer using the supplied cable. The USB connection is used for: • Configuration with the DDRC-24 plugin and the DiracLive application, and •... -
Page 11: Software Installation
OFTWARE NSTALLATION The DDRC-24 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 W INDOWS This section describes software download and installation for Windows 10. -
Page 12: Install The Minidsp Software
We recommend accepting the default installation location. Once driver installation completes, click Finish. Note: the first time you run the DDRC-24 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. -
Page 13: Macos 10.14 Mojave And 10.15 Catalina
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. -
Page 14: Install The Minidsp Software
We recommend that you accept the default installation settings. 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. -
Page 15: 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 16: 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 17: Synchronizing With The Processor
Download the data for the currently selected configuration into the DDRC-24. Note that this applies only to data that can be changed in the DDRC-24 plugin — Dirac Live filters are not changed by doing this. After downloading the configuration data, the plugin is online. -
Page 18: Key Features
The Dirac Live button turns Dirac Live processing on and off. This function can also be accessed with a remote control and from within the DiracLive app: The IP Address and Auto fields are for use with networked control of the plugin using the miniDSP WI-DG Wifi/Ethernet to USB bridge. -
Page 19: Configuration/Preset Selection
The input can also be selected with a remote control – see page 28. miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 20: Matrix Mixer
30 ms. These are described in detail in Section 8. miniDSP Ltd, Hong Kong / www.minidsp.com / Features and specifications subject to change without prior notice... -
Page 21: Configuring Back-End Processing
Manual. 4.3.1 Signal flow To understand how the DDRC-24 combines Dirac Live with miniDSP’s audio processing, refer to the signal flow diagram in Figure 1: • One of the stereo input sources is selected by the user and passed to two channels of Dirac Live processing for digital room correction. -
Page 22: Configuration Procedure
The Dirac Live test signal originates in the Dirac Live blocks, so it “sees” the output channel processing configured by the DDRC-24 plugin. Crossovers or parametric EQ set up in the output channels will affect the response that Dirac Live measures. -
Page 23: Plugin Configuration Guide
Check that the crossover filters of channels 1 and 2 (“Left” and “Right”) are bypassed: 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 run the Dirac Live calibration as described in the miniDSP Dirac Live User Manual. -
Page 24: Stereo Room Correction And Subwoofer Integration
DDRC-24 Sub integration note at this link. After you have set up the DDRC-24 plugin, save your configuration to a file. Then run a Dirac Live calibration as described in the miniDSP Dirac Live User Manual. -
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 run a Dirac Live calibration as described in the miniDSP Dirac Live User Manual. -
Page 26: Stereo Room Correction And Two-Way Active Speaker
This is a typical low pass setting for the woofers: 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 run a Dirac Live calibration as described in the miniDSP Dirac Live User Manual. -
Page 27: Dirac Live Calibration
DDRC-24 product page on our website. Be sure to start the DiracLive application from within the DDRC-24 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-24 processor. -
Page 28: Infrared Remote Control
3 dB steps. Mute Mutes and unmutes audio output. The DDRC-24 can also “learn” the control codes of your current remote if it supports one of the following remote control codes: •... -
Page 29: Usb Audio
7 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 30: 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 31: 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 32: 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 33: 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 34 "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 35: 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 36 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 37: 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 38: 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). 8.4 C USTOM BIQUAD PROGRAMMING Custom biquad programming is available in the PEQ and Crossover blocks. -
Page 39: 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 40: 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 41: 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 offline. -
Page 42: Saving And Loading Configurations
DiracLive application. For example, if the remote control or front panel is used to select preset 3, then both DDRC-24 configuration 3 and Dirac Live filter set 3 are loaded for audio processing. The stored configuration file contains the data for the DDRC-24 plugin only. The Dirac Live filters must be loaded separately using the DiracLive application. -
Page 43: Restoring To Defaults
8.6 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 44: 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 45: Trouble-Shooting Playback Issues
No sound during playback If you get no sound while playing music, first quit DiracLive if it is open, and start the DDRC-24 plugin. If there is no signal on the input meters Check which input source you have selected. -
Page 46: Firmware Upgrade
DDRC-24 MCU firmware to enable new features. To upgrade the MCU firmware, first download the latest version of the DDRC-24 software package from the User Downloads section of the miniDSP website, then extract it on your computer (on Windows, right-click and select “Extract All...”;... - Page 47 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 48: Macos / Os X
9.3.2 macOS / OS X Connect the DDRC-24 to your computer via USB (if not already connected) and power it on. Navigate to the XMOS_Firmware/Firmware_Upgrade_Tools/Mac folder of the software download. Double-click on the DFU Utility.app program to run it: miniDSP Ltd, Hong Kong / www.minidsp.com... - Page 49 You will get a progress bar as the 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 50: Obtaining Support
9.4 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 support.minidsp.com with: a. The product information obtained from the DDRC-24 plugin’s About button and the DiracLive application.
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