miniDSP OpenDRC-AN, OpenDRC-DA User Manual
Manual revision
Description
Date
V1.0
Initial revision
13-07-2012
OpenDRC-AN
USER MANUAL
www.miniDSP.com
miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and Specifications are subject to change without prior notice
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Contents
1 Product Introduction .............................................................................................................................................................................................. 3
2 System Connectivity ............................................................................................................................................................................................... 5
2.1 Connectivity ..................................................................................................................................................................................................... 5
2.2 Typical setup .................................................................................................................................................................................................... 5
2.2.1 DC Power connectivity........................................................................................................................................................................ 6
2.2.2 Analog Audio connectivity ................................................................................................................................................................. 6
2.2.3 Analog Audio internal Jumper configuration .................................................................................................................................. 6
3 Plug-in Architecture – OpenDRC 2x2 plug-in ..................................................................................................................................................... 9
3.1.1 Main Page ............................................................................................................................................................................................. 9
3.1.2 Preset Memory selection ..................................................................................................................................................................... 9
3.1.3 Main Tab ................................................................................................................................................................................................ 9
3.1.4 Input channel mode .......................................................................................................................................................................... 10
3.1.5 Parametric Equalizer .......................................................................................................................................................................... 10
3.1.6 FIR (Finite Impulse Response) filter section ...................................................................................................................................... 11
3.1.7 Output Section .................................................................................................................................................................................... 12
3.2 Load/Save/Restore a configuration ........................................................................................................................................................... 14
3.2.1 Load configuration: ........................................................................................................................................................................... 14
3.2.2 Save configuration ............................................................................................................................................................................. 14
3.2.3 Restore current configuration only .................................................................................................................................................. 14
3.2.4 Restore Factory default ..................................................................................................................................................................... 14
3.3 IR remote learning feature ........................................................................................................................................................................... 15
3.4 ................................................................................................................................................................................................................................. 15
3.5 Firmware upgrade ......................................................................................................................................................................................... 15
4 Technical Specifications ...................................................................................................................................................................................... 17
5 Troubleshooting ..................................................................................................................................................................................................... 19
miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and Specifications are subject to change without prior notice
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1 Product Introduction
The OpenDRC is a Digital Audio Signal Processor (DSP) capable of performing a wide range of processing including filtering (FIR + IIR),
compression/limiter, time alignment.. Typically located between an audio source (CD player/Receiver/Preamp/PC .. etc) and the
amplifier, the OpenDRC will provide unparalleled tuning flexibility to improve your audio system’s performance. Using a PC/Mac
machine and a USB connection, you will be able to control your platform from the “plug-in”: an intuitive software application
allowing real time modification to your configuration.
Besides its audio specs, a great part of our product concept lies in its simplicity of use. The sequence of steps required to control the
unit can be summarized as follow:
- Connect the board to your PC/Mac machine using a USB cable
- Launch the plug-in to configure settings as required.
- Click “Connect & Synchronize” your PC to the board
- Once synchronized, any change is real time and does not require any “Synchronization”. All settings are also automatically
saved to both the DSP and the Flash for long term memory.
- Once happy with your configuration, you can disconnect the board from your computer since from this point on, the audio
configuration will run as last modified in on-line mode and recalled following every reboot.
- Enjoy!
Minimum System Requirements for software installation
The software minimum requirements are as follow:
PC Environment
1. PC with 1GHz or higher processor clock speed recommended / Intel® Pentium®/Celeron® family, or AMD K6®/AMD
Athlon®/AMD Duron® family, or compatible processor recommended.
2. 512 megabytes (MB) of RAM or higher recommended
3. USB 2.0 port
4. Keyboard and mouse or compatible pointing device
5. Microsoft• ® Windows® Vista® SP1/ XP pro SP2/Win7
6. Microsoft• ® .NET framework v3.5
7. Adobe AIR environment (latest version)
8. Adobe Flash player (latest version)
MAC Environment
1. Intel based MAC with 1GHz or higher processor clock speed recommended
2. 512 megabytes (MB) of RAM or higher recommended
3. USB 2.0 port
4. Keyboard and mouse or compatible pointing device
5. Mac OSX 10.4 or higher
6. Adobe AIR environment (latest version)
7. Adobe Flash player (latest version)
Package content
Your OpenDRC-AN package includes:
1 x OpenDRC-AN unit
1 x USB cable Type B
1 x 5VDC universal power supply with interchangeable plugs for US, UK, EU, AU
1 x short step by step startup guide
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DISCLAIMER / WARNING
An incorrect DSP configuration could easily damage your audio system. miniDSP Ltd can not be responsible for any damage that
may result from the improper use of this product. As with any other product, we do recommend that you carefully read the manual
and other technical notes to insure you fully understand how to operate the board.
As a general guideline, you should first configure your audio processor board before connecting anything to the outputs of the unit
(loudspeakers/other output sources). Doing so will insure that you have the software correctly configured and won’t cause any
damage to your system.
Finally, this unit is a very flexible board and 99% of typical questions we receive at the tech support department are already answered
in this user manual. So please take the time to carefully read this user manual. Thanks for your understanding!
WARRANTY TERMS
miniDSP Ltd warrants all our products to be free of from defects in materials and workmanship for a period of one year from the
invoice date. Our warranty terms do not cover failure of the product due to an external trigger, misuse, servicing or usage outside of
the recommended use. With this said, make sure to carefully read the user manual when customizing the board. Any board damage
investigated as failure to follow proper installation may void the warranty. So if in doubt, please make sure to contact us first.
miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and Specifications are subject to change without prior notice
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OpenDRC
Platform
DIGITAL AUDIO
SOURCE
DIGITAL AUDIO
Destination
PC/MAC
IR Remote for
control
XLR for Analog
Audio inputs
5VDC
Power Input
XLR for Analog
Audio outputs
USB 2.0
PC/Mac control
Rotary/Push
Encoder
Selected Preset
Indicator
2 System Connectivity
2.1 Connectivity
2.2 Typical setup
The following diagram is a typical connectivity diagram for a basic setup with analog inputs, analog outputs. To prevent any
damage, make sure the board is turned OFF before doing any connection modifications. Note that the computer is only required for
initial configuration.
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Signal
Connector
Analog Balanced Audio
Balanced connectivity on Neutrik 3pin XLR connector:
PIN1: S = > Cable Shield
PIN2: + = > Positive cable
PIN3: - = > Return cable
Analog unbalanced Audio
Unbalanced audio connectivity Neutrik 3pin XLR connector can be achieved by
linking Pin1 & Pin 3 together (Minus)
PIN1: - = > Minus
PIN2: + = > Positive cable
PIN3: - = > Minus cable
Another alternative is to use a transformer. Jensen Transformers is a known
reference out there while many other solutions are also available if you google for
such adaptor.
Channel 1 input
jumpers
Channel 1 input
jumpers
2.2.1 DC Power connectivity
OpenDRC-AN requires a single 5VDC supply to operate. A universal SMPS power supply is already provided along with the unit.
Here is a picture of the power supply provided along with the plugs.
2.2.2 Analog Audio connectivity
The OpenDRC-AN can accept analog balanced or unbalanced signals for input and output. If you do not wish to build custom
cables, many cables/transformer adapters are readily available
2.2.3 Analog Audio internal Jumper configuration
The OpenDRC-AN has internal jumpers to modify the maximum input level of the unit from 8Vrms to 2Vrms balanced input.
Note that these jumpers are essentially an input pad. They are NOT changing the output level (fixed @ 2Vrms).
o By default, jumpers are configured for 2Vrms (i.e. unity gain structure for 2Vrms in @ 0dBFS = 2Vrms out @ 0dBFS). The jumpers
are closed.
o If you remove the jumpers (open). The maximum input level becomes 8Vrms.
miniDSP Ltd – Hong Kong / Email : info@minidsp.com / Features and Specifications are subject to change without prior notice
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