Related Manuals for miniDSP Dirac DDRC-22A
Summary of Contents for miniDSP Dirac DDRC-22A
- Page 1 IRAC ERIES RESOLUTION UDIO ROCESSORS ® WITH IRAC TECHNOLOGY User Manual DDRC-22A DDRC-22D miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice...
- Page 2 Revision history Revision Description Date Initial public release 26 Mar 2014 First production version 4 April 2014 miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice...
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Page 3: Table Of Contents
Editing the target curve ......................26 4.2.3 Guidelines for target curve design ....................27 4.2.4 Saving and loading target curves ....................28 miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice... - Page 4 Infrared remote control ........................32 Additional Information ..........................33 Specifications ............................. 33 Troubleshooting ..........................34 MCU Firmware upgrade ........................35 Obtaining Support ..........................36 miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice...
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Page 5: Important Information
ARRANTY ERMS 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. -
Page 6: Package Contents
One USB cable for computer connectivity One UMIK-1 calibrated measurement microphone with USB cable One tripod microphone stand One license for Dirac Live Calibration Tool Stereo for miniDSP One printed Quick-start Guide OTE ON THIS ANUAL This User Manual is designed for reading in both print and on the computer. -
Page 7: Product Overview
Reduce early reflections Dirac Series processors are available in different versions. The DDRC-22A has analog inputs and outputs, while the DDRC-22D has digital inputs and outputs. Each is inserted into the signal chain in the appropriate location (see below for examples). -
Page 8: How Dirac Live® Works
IRAC WORKS Each model in the miniDSP Dirac Series of audio processors includes Dirac Live®, a premium mixed-phase room correction technology. This technology is used not only in home stereo systems but also in cinemas, recording studios, and luxury cars. - Page 9 Illustration of Dirac Live® magnitude response correction Illustration of Dirac Live® impulse response correction miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice...
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Page 10: The Dirac Series / Dirac Live® Design Process
Connect the Dirac Series audio processor into your system and install software. See Section 2, Installation and Setup. Run a series of acoustic measurements using the Dirac Live Calibration Tool Stereo for miniDSP program, to capture the acoustic behavior of your speakers and room. See Section 3, Acoustic Measurement. -
Page 11: Installation And Setup
All analog connections are via balanced XLR connectors, so in the event that your other equipment has only single-ended (RCA) connections, use suitable RCA-XLR adapters or adapter cables. miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice... -
Page 12: Dc Power
Once calibration and configuration is complete, the computer can be disconnected. The processor can then be controlled from the front panel or via remote control – see Using the Dirac Series audio processor. miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice... -
Page 13: Software Installation And License Activation
User Downloads section of the miniDSP website, under the Dirac Series heading. http://www.minidsp.com/userdownloads Download two installation zip files: the Dirac Live Calibration Tool Stereo version for miniDSP, and the DDRC Configuration Plugin. Unzip each file and double-click to run each installer. Follow the on-screen instructions to complete installation. -
Page 14: License Validation
2.2.4 License validation Start the Dirac Live Calibration Tool Stereo for miniDSP program. It will ask you to validate your software license. Enter the license credentials that you obtained in the above step, and then click on Validate: You will need to be connected to the Internet to validate your license. -
Page 15: Acoustic Measurement
COUSTIC EASUREMENT 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 Dirac Series audio processor and the supplied UMIK-1 measurement microphone. No additional hardware or connectivity is required. -
Page 16: 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 / Email : info@minidsp.com / Features and specifications subject to change without prior notice... -
Page 17: Configuring For Measurement
3.3 C ONFIGURING FOR MEASUREMENT Start Dirac Live Calibration Tool Stereo for miniDSP (if it is not already running). The main areas of the screen are: Logo and status progress bar This area shows a progress bar with current status when the program is performing calculations. -
Page 18: Sound System Tab
Series processors. Test signal playback device Preset to DDRC-22 (miniDSP Ltd). This will ensure that test signals are sent into your audio system via the Dirac Series processor. (If this is not present, check that your Dirac Series processor is connected via USB and powered on, and click the Rescan button.) Once you have verified that this screen is correct, click the Proceed button. -
Page 19: 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 / Email : info@minidsp.com / Features and specifications subject to change without prior notice... -
Page 20: Running The Measurements
Measurements are performed on the Measurements screen. 3.4.1 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 21: Executing Measurements
Then re-run the measurement. (You do not need to redo the measurements you have already successfully completed, even if you change volume or gain.) miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice... -
Page 22: 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 / Email : info@minidsp.com / Features and specifications subject to change without prior notice... -
Page 23: Filter Design
ILTER ESIGN 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. 4.1 W ORKING WITH GRAPHS The Filter Design screen shows a number of plots that can individually be turned on and off with the checkboxes near the top of the screen. - Page 24 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 / Email : info@minidsp.com...
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Page 25: Designing Your Target Curve
Note: restoring the auto target will erase the current target curve. If you wish to keep it, you can save it to a file – see Saving and loading target curves below miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice... -
Page 26: 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 / Email : info@minidsp.com / Features and specifications subject to change without prior notice... -
Page 27: Guidelines For Target Curve Design
(You may also wish to try a different set of measurement locations.) miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice... -
Page 28: 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 29: Downloading And Managing Filter Sets
Adjust the slider to adjust the output volume of the processor. Once the computer is disconnected, output volume can also be adjusted from the front panel or by remote control (see Infrared remote control below). miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice... - Page 30 Load another project. Its most recently generated filter set can then be dropped onto an empty slot. Here is an example screen with three loaded filter sets and with Dirac Live® filtering enabled: miniDSP Ltd – Hong Kong / Email : info@minidsp.com...
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Page 31: Using The Dirac Series Audio Processor
The Dirac Series audio processors use a minimalist physical control design with a single control knob. To change the volume Rotate the control knob clockwise to increase the volume, and counter-clockwise to decrease it. miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice... -
Page 32: Infrared Remote Control
A dialog will appear to show that the code was recognized. If the processor does not recognize the remote control code, then it will time out and display a message saying that no IR code was detected. miniDSP Ltd – Hong Kong / Email : info@minidsp.com... -
Page 33: Additional Information
5 VDC single supply @ 600mA, 2.1 mm center-positive Dimensions (H x W x D) 41.5 x 214.5 x 206 mm miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and specifications subject to change without prior notice... -
Page 34: Troubleshooting
Check that the USB cable is firmly connected. DDRC-22 doesn’t appear in the Sound System tab Check that you have the miniDSP version of the software installed, called Dirac Live Calibration Tool Stereo for miniDSP. Go to the Sound System tab and click the Rescan button Check the Output volume slider. -
Page 35: Mcu Firmware Upgrade
Dirac Series processor MCU firmware to enable new features. To update the MCU firmware: Download the latest utility software from the User Downloads section of the miniDSP website and unzip it. With power removed from the Dirac Series processor, remove four screws and detach the lid. -
Page 36: Obtaining Support
6.4 O BTAINING UPPORT 1. Check the forums on miniDSP.com to see if this issue has already been raised and a solution or solutions provided. 2. Send an email to info@minidsp.com with: a. The specific product you are having an issue with.