Here - miniDSP
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1. 13 3 2 System settings Available for all plug ins 14 3 2 1 Load conig ra tOM ERR TT E 14 60 2 2 DAVES CONNIJUTAUON e 14 3 2 3 ae ED o M A A ME RE A NE Na a a aa 14 man id sp 1 System setup Minimum System Requirements for software installation MiniDSP controller software runs in a PC environment with the following minimum requirements Software e Microsoft Windows Vista SP1 XP pro SP2 e Microsoft amp NET framework v3 5 e Adobe AIR environment latest version e Adobe Flash player latest version Hardware e 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 e 256 megabytes MB of RAM or higher recommended e USB 2 0 port e Keyboard and mouse or compatible pointing device Package content Your miniDSP kit includes e 1 xminiDSP 2x4 e 1x miniUSB cable e 1x93 RCA audio cable e Step by Step startup guide Disclaimer Warning An incorrect miniDSP configuration could easily damage your audio system MiniDSP 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 miniDSP board before connecting2. marn id s p miniDSP Kit USER MANUAL V1 6 E ma m inmid s uj Table of content Sis D SO geese ete notte E A 3 ATDS aS RETE EET 4 MER UE SENI RB OI 2mm 4 EN MINI SP programming sssasscsessdexc ante pek bed dncedotd delu dedo def ae beer chiots eat ak o dad Roa aaa kebaba 4 BS SS qEeong e 5 lI Dical connection diagrami anaonimno o Ri ren i 5 Typical connection diagram nana 6 2 3 1 MINDSP DC Power ODTIOIS uu don ivan ee iin ena oblek abu erben sva aje 6 D o 2 MNDSP REVA VS REV nja ene oo m eo ae jin veta baba nji uate iniu viet e 6 ES Typical plug in architecture nk nnn nnn nennen nn 8 COMES 0 0 o e ye 8 3 1 1 Inputs and RMS meters Available in all plug ins eeeeseeeeseeeeeeee 8 3 1 2 High and Low pass filters Available in Mixer 2way Xover 4way plugins 9 3 1 3 Graphic equalizer Available in Mixer 2way 4way Xover Graphic EQ version 10 3 1 4 Parametric Equalizer Available in 2way PEQ 4way PEQ versions 10 3 1 5 Matrix mixer controls Available in Mixer plug in only eeeeeeeeseesees 11 3 1 6 Output Controls for Gain output level delay and phase All plug ins 11 3 1 7 Advanced Plug in features 12 3 1 8 Room EQ Wizard REW integration Advanced software only
3. 0 9Vrms Mode 2Vrms Mode mands gp Plug in configuration 1 Before connecting the MiniDSP board to the PC you need to install the plug in software that was downloaded from the plug in section of our online store Please refer to the download instructions sent to you by email on the day of shipping of the board 2 As per the system requirements the following frameworks need to be installed o Microsofte amp NET framework v3 5 PC only o Adobe AIR environment Mac Win o Latest version of Adobe Flash player Mac Win 3 Once the software installed connect the MiniDSP board to a USB 2 0 of your PC using the provided mini USB cable The device will be recognized as a HID driver and does not reguire any driver installation Note A blue LED in the center of the board will flash at a rate of 1sec on 1 sec off once the board is correctly powered 4 Open the software application to gain control of the board Please read carefully the following lines By default all plug ins start in offline mode meaning changes made on the user interface do not affect your configuration It is designed in such a way that you can visually confirm your configuration before loading it to the MiniDSP kit You should also know that plug ins can only synchronize from PC to board and are not able to retrieve a configuration from the kit It basically means that if you really like your configuration make sure you save it somewhere on your har
4. etc Using the biquad calculator you can easily calculate these coefficients without the need of any external software Building a cascaded filter configuration is a child s play amp MINI DSP 4 WAY CROSSOVER ADV V2 Biquad Calculator biguadi bO 1 0049819589501057 b1 1 9934044481004058 b2 0 9884396486667729 ai 1 9934116680586003 a2 0 9934143876586842 PEQ interface for basic vs Advanced mode x Basic Advanced PARAMETRIC EQ BAND 1 Filter type Frequency 20 ee Basic Advanced PARAMETRIC EQ BAND 1 ao 1 b 1i Filter interface for basic vs Advanced mode mews p 23 Basic Advanced Basic Advanced LOW PASS FILTER SETTINGS Cut off frequency is Filter Type Bypass filter HIGH PASS FILTER SETTINGS Re 100 Cut off frequency Filter Type Bypass filter Note In the filter mode the software interface expects the 8 biquads to be filled in such format biguad1 b0 0 00004232437545981 1486 b1 0 00008464875091962297 b2 0 00004232437545981 1486 a1 1 975933280159253 a2 0 9761025776610925 biguad2 b0 0 00004232437545981 1486 b1 0 00008464875091962297 b2 0 00004232437545981 1486 a1 1 975933280159253 a2 0 9761025776610925 biquad8 b0 0 00004232437545981 1486 b1 0 00008464875091962297 b2 0 00004232437545981 1486 a1 1 975933280159253 a2 0 9761025776610925 3 1 8 Room EQ Wizard REW integration Advanced software only Also available uniguely for the Ad
5. 4 o 60 o 60 If for example you would like to mix input 2 to output 4 increase the volume of this knob since it represents the crosspoint between Input Row 2 and Output column 4 3 1 6 Output Controls for Gain output level delay and phase All plug ins The output section will allow control of time alignment delay phase and gain See below typical screen shot of the interface OUTPUTS 1 and 2 OUTPUT CHANNEL 1 OUTPUT CHANNEL 2 Output delay in ms Output delay in ms 0 7 5ms 0 7 5ms B gt Bg Distance 0 034 meters i Distance 0 meters Polarity Polarity Infinity Infinity INVERT INVERT 3 1 7 Advanced Plug in features For those of you wishing to experiment with your custom filter programming miniDSP provides an easy interface for custom biguad programming A lot of readily available information can be found online and the reader shouldn t expect this user manual to provide the basics about biquad 5 11 5 11 programming For more info google Biquad filters digital filters eg cookbook The advantage of the Advanced mode remains the flexibility miniDSP provides in allowing you to build any custom filter e g cascade filter Linkwitz transform high order filters etc with a simple programming user interface as shown below How to use the advanced mode First and foremost you will need understand that biquad coefficients can represent a wide range of filters e g LPF HPF PEQ high shelv
6. Cancel Places Warning Remember to save the file as xml file extension e g file saved as backup xml Otherwise the software will not recognize the file at restore 3 2 3 Restore Clicking on this button will restore the board back to factory default All settings will be lost during this process Troubleshooting miniDSP 2x4 The following symptoms were found to be the most likely cause of issues Symptoms Troubleshooting recommendation If not solved go to jem No audio on outputs Make sure that audio signal is shown on the RMS input meters Double check that input 8 output mute buttons are not greyed out mute ON Confirm that master mute is disabled 2 No audio on RMS Check your connectivity 10 input meters Double check the strength of your input signal Confirm that master mute is disabled 3 Audio on input RMS Make sure the matrix mixer is set to send 10 meters but no audio audio to the output channels in a mixer plug in on outputs Check the output mute status for each channel EN camot read Confirm the file format of your file xml iF configuration Confirm the version of the file EE anmot connect to If using external DC supply try connecting the 9 the board board with USB power only IF Confirm that you installed the required m software frameworks Adobe Air Microsoft net SP2 XP Problem unsolved by Have a look at our forums to see if someone above suggestions else a
7. anything to the outputs of the MiniDSP 2x4 loudspeakers other output sources Doing so will make sure that you have the software correctly configured and won t cause any damage to your system Once again miniDSP can not be responsible of any damages the board make cause to your system Finally MiniDSP is a very flexible board and 99 of typical guestions 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 mews p 2 miniDSP Basics Before diving into the details of this board it is important for you to fully understand what a miniDSP does and how it can be useful to the setup of your audio system The following section will highlight basic concepts of a miniDSP 2x4 2 1 What is a miniDSP miniDSP is a Digital Audio Signal Processor capable of performing a wide range of applications from filtering equalization muting time alignment etc The control of the device is performed from a software application so called a plug in which provides control of the board settings over USB Only one plug in can run on a miniDSP board at a time and only one miniDSP board can be controlled at a time 2 2 miniDSP programming A good part of the success of the miniDSP concept lies in its simplicity of use Here are the typical steps required to program a miniDSP Connect the board to your PC Mac machine Launch the plu
8. d drive more to follow below to be able to reload them at a later time 5 Once the configuration checked you can go online by clicking the Connect amp Synchronize button as shown below HELP AUDIO ON a Synchronize C Providing your board is connected to the PC with a USB cable the following important dialog box pops up with 4 options A miniDSP kit with Serial 900026 was detected Please choose from one of the following options a Synchronize With this option the current plug in configuration will be loaded flashed to the MiniDSP kit and your plug in turned to On line mode Warning that it will overwrite whatever configuration was previously loaded on the board If you d like to load a different configuration click cancel and go to the settings tab to load one of your previously saved configurations Note If you previously installed a different firmware version on your kit this button will display Synchronize amp Upgrade Meaning the MiniDSP kit firmware will be upgraded to the current plug in firmware along with the current settings you have b Restore to Default With this option the software application resets all settings back to factory default and reload the firmware Warning that all current settings will be lost and there are no ways to be able to recover them c If in any doubt click the Help button to refresh your memory on these choices or click Cancel to be able to go back to the of
9. es to the stereo field GRAPHIC EQUALIZER CHANNEL 2 20 EQUALIZER SETTINGS Frequency 126 Hz Gain 7dB BYPASS RESET ne Link channels 200 500 1000 2000 5000 10000 20000 80 100 125 160 200 250 315 400 500 630 800 1k ik2 1k6 2k 2k5 3ki 4k Sk 6k3 8k 10k 12k 16k 20k 0 1 4 6 3 2 o 0 o 0 D 0 o 0 0 o o D o D D 0 0 Note The log graph displays the combined effect of low pass filter equalization and high pass filtering 3 1 4 Parametric Equalizer Available in 2way PEQ 4way PEQ versions e EG band selection Select one of the 6 x Parametric equalizers e Filter type Select between Peak Low Shelf High Shelf e Bypass Disables the equalization but doesn t reset the settings A handy tool to check the influence of equalization on your system without resetting to zero Note that the bypass button is per band Bypass not overall ma id s p PARAMETRIC EQUALIZER INPUT CHANNEL 1 20 50 10000 20000 EQ BAND SELECTION EQ1 Freq 5002 PARAMETRIC EQ BAND 3 EQ2 Freq 808 Filter type EQ3 Freq 165 Frequency 166 ma Gain 6 05 ra Q 1 99 n EQ4 Freq 20 A A EQ5 Freq 20 EG6 Freq 20 3 1 5 Matrix mixer controls Available in Mixer plug in only A matrix mixer object allows a set of inputs to be mixed to a set of outputs In the MiniDSP case there are 2 inputs rows and 4 outputs columns By default Input 1 goes to Output 1 amp 3 while input 2 goes to channel 2 amp 4 MATRIX MIXER OUT 1 OUT 2 OUT 3 OUT
10. fline mode In either synchronization steps the following dialog box will pop up It s very important that you do not un plug the board in the middle of a firmware upgrades or you may corrupt the configuration Loading configuration to the board Please do not un plug the board or close the application 6 Once the board fully synchronized a Successful connection to the board message pops up From this point on all changes to the configuration will be real time and live therefore giving you the chance to hear the effect of your equalization filtering tuning 3 Typical plug in architecture Depending on your plug in the software is organized as below Main tab Gives you access to Audio or System settings sections Synchronize button Allows you to go online and gain control of your system Audio Mute Mute all inputs amp outputs Help link A quick link to get back to the main help page Control toolbar Click to access controls of each audio algorithm Main Tab Connect amp Master Mute Help link Synchronize MINI DSP STEREO CROSSOVER REVB AUDIO ON HELP OG Control toolbar 3 1 Audio settings 3 1 1 Inputs and RMS meters Available in all plug ins The first step in configuring your MiniDSP consists in making sure audio is being fed to the input correctly To do so click on the button labeled inputs The RMS meter will quickly indicate the average value of the input signal in dBFS i e relative to
11. g in by default in off line mode and allowing you to configure settings as required The next step is to Connect amp Synchronize your PC to the board i e flashing the configuration you just have in your plug in and going to the On line mode Once the board synchronized you will be in what the so called On line mode i e able to hear the effect on real time changes to the settings No further Synchronization to the board is required since all settings from now on are saved to both the DSP and the Flash component of the device for long term memory Once happy with your configuration simply un plug the board and the audio configuration will run as last modified in on line mode No need for a PC connection from now on since the board will boot up every time with that configuration Now that you have a basic understanding of how things work let s get down to the details asp 2 3 Board connectivity First step in configuring your board is getting familiar with its connectivity miniDSP Top View OUT4 OUT3 OUT2 OUTI Oma a Sl miniDSP Front View Positive of DC supply Ground GND aT DC IN Input RCA Mini USB DC input connector connectors connector min ids p Typical connection diagram The following diagram is a typical connectivity diagram for a basic setup with analog inputs analog outputs Stacked configurations with miniDSP I O cards such as miniAMP miniDIGI are shown in later
12. lready had this issue Send us an email info minidsp com with a clear explanation of the symptoms and descriptions of the troubleshooting steps you already performed
13. sections of this user manual To prevent any damage make sure the board is turned OFF before doing any connection modifications MiniDSP board Stereo audio m RCA Audio J cable li x S Active loudspeakers li zi A V receiver Ci Multi channel amplifier a Recording devices UF etc MiniUSB cable PC with USB connection 2 3 1 minDSP DC Power options miniDSP 2x4 may receive power from different configurations Being a USB self powered device a USB connection to your PC or a standard USB charger supply 150mA 5V is sufficient to power the device While a quick check from looking at the back of the product will not hurt 99 of USB chargers will easily handle this small load An external DC supply may also be used to the board using the terminal block connector Select a power supply with DC voltage between 5 to 24VDC Be extremely careful to apply the correct polarity to the Terminal block connector as below Positive of DC supply Ground GND OO In2 In1 USB DC IN 2 3 2 miniDSP RevA vs RevB miniDSP 2x4 comes in 2 configuration to adjust the maximum input level of the unit The RevA has a maximum input level of 0 9Vrms while the RevB has a max input level of 2Vrms If you would like to modify your unit a simple screwdriver will allow you to open the panels of the unit and access the internal jumpers as shown below
14. ter types o Linkwitz Riley LR Available in 12 24 48dB oct o Butterworth BW Available in 6 12 18 24 30 36 42 48dB oct o Bessel Available in 12dB oct Each filter has different phase and amplitude characteristics We recommend you to look online for more information about the specifics of each filter e Bypass button allows you to disable the filter Enabled by default Make sure to bypass the filter if you do not need a low pass filter mews p CH1 BandPass filter OUT1 2 WAY CROSSOVER LOW PASS FILTER SETTINGS Cut off frequency 1000 Filter Type LR 48dB oct Bypass filter BYPASS HIGH PASS FILTER SETTINGS Cut off frequency 5d Filter Type LR 48dB oct v Bypass filter BYPASS CH1 BandPass filter OUT2 50 100 200 500 1000 2000 5000 10000 20000 N o Bandpass filter 1 EN B Bandpass filter 2 The log scale graph gives you the equivalent response of the applied filter By pointing the mouse anywhere on the plotted curve the dB attenuation and respective frequency are displayed 3 1 3 Graphic equalizer Available in Mixer 2way 4way Xover Graphic EQ version Bypass Disables the equalization but doesn t reset the settings A handy tool to check the influence of equalization on your system without resetting to zero e Reset Sets all boost faders back to zero e Link channels If enabled any change on either graphic EQ channels is reflected on both graphic EQ A useful feature to apply chang
15. the full scale of the ADC or 24bit I2S signal Individual faders control the digital gain at the input and per channel mute status This meter displays dB full scale dBFS values and will saturate at OdBFS for about 0 9Vrms mode or 2Vrms mode Make sure to keep the signal below OdBFS red color and with enough headroom to prevent distortion Screenshot of Input window for 2way Mixer plug ins mews p INPUTS Volume and RMS meter INPUT CHANNEL 1 INPUT CHANNEL 2 dBFS input Barcohenmsl aptis Per channel Next Page mute button Level control Screenshot of Input window for 4way plug ins INPUTS Volume and RMS meter CHANNEL SELECTION INPUT CHANNEL Select which channel Left or Right you want to filter Input 1 Left O input 2 Right Infinity Click the Next button to switch windows OR click one of the control toolbar buttons A darker color indicates the current active tab Parametric EO Ouput 1 Parametric EQ EENEEEN Delay Gain RMS Outputs 1 amp 2 Parametric EQ Ouput 2 Parametric EQ Ouput 3 mE Parametric EQ Crossover Delay Gain RMS Outputs 3 amp 4 Parametric EQ Ouput 4 3 1 2 High and Low pass filters Available in Mixer 2way Xover 4way plugins Controls for the Low and High pass filters are very much similar e Cut off frequency Select the 3dB frequency by either entering the value or using the up amp down arrows of the numeric box e Choose one of the three fil
16. vanced biguad product series is the integration with REW software By combining a measurement software with our miniDSP kits it basically allows custom biquad filters generated by the AutoEQ function of REW to be inputted inside the miniDSP software For more information please consult the REW software user manual and EQ device section mamas p 3 2 System settings Available for all plug ins The system settings page contains the following controls SYSTEM SETTINGS LOAD CONFIGURATION SAVE CONFIGURATION DEFAULT CONFIGURATION Load a previously saved xml Save the current configuration on Restore your MiniDSP back to configuration to the MiniDSP board your PC Remember to save asa factory default Warning this step xml file format will clear all configuration settings ANALOG DIGITAL INPUT Toggle between the on chip ADC or I2S input signal Analog input Digital input 12S 3 2 1 Load configuration Use this feature to load a previously saved configuration The file must be as xml format and previously saved from this plug in For complexity reasons inter plug in compatibility is not available 3 2 2 Save configuration Click on this button to save your audio settings configuration The following dialog box allows you to save the file anywhere on your PC as a xml format Save in lo Backup Mini DSP t Ci Eg My Recent Documents File name backup xml v Save ig z pose My Network
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