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AS2.100

1. ES M Ic x Measurement Sampling Rate Hz B0000 Processor Sampling Rate Hz fi 92000 Graph Smoothing octaves jo 25 Source HEX file Select Close The settings window is under File gt Settings Measurement sampling rate sets the sample rate used in the imported response files typically 48kHz Processor sampling rate is that of the Hypex DSP hardware Note that this setting does not control the sampling rate of the hardware Rather it informs the filter design application of what that sampling rate is In short leave this at 48kHz The select button opens a file dialogue box witch is not used in this application 13 v HY DEN Seerronics AS2 100 Work flow Measurement Measuring using the DSP unit set to flat Perform impulse response measurements for each driver separately Save the entire impulse record truncation can be done later on the filter design program Measuring using an external amplifier A separate amplifier may also be used for measuring the drivers provided the amplifier s output impedance is as low as the DSP unit s Importing response data Select the tab for the channel you want to import and click select The filter designer expects the impulse response measurement as a text file with one sample per line There is no restriction on the absolute gain of the impulse response data The only thing that matters is that the absolute gain be the same for all three measu
2. hypex electronics Hypex Electronics BV Kattegat 8 9723 JP Groningen The Netherlands 3150 526 4993 info hypex nl User Manual AS2 100 S P re DX a s vo AS2 100 UcD Class D Technology CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN PRECAUTION RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR Amplifier Out NV YN 4 h ir aH EUN C Right Serial number D QC 230V 50Hz Fuse 1 6AT O Hypex AS Series v hy sw AS2 100 Table of contents PFOLOCY PO ue Lt System information Description ooo cece cc cece cccsccsseecseccseeesscesseesseccseccsscessecssecsecessecssccseceseeccssccsseecseccssccsecesiaessesesscenseeseeenseess Hardware Architectute i eed ie e a tabes ete eda i cerit 5 Digital audio input BE m Audio performance data EK 5 Remote Control iu netten de coni teo eee Geren Gat seen 5 Product overview Setting up your system Hardware part cese eaae WE ene Software installation Control panel Filter design ER RR Graph Area Filter Definition Area Work flow Measurement Designing filters Douwnload Examples e ants Example 1 2 channel stereo setup sei Example 2 Stereo setup e 20 v hy A AS2 100 Prototype remarks Caution the following parts are not implemented or finished at this moment The filtering for the sub
3. AS2 100 Example 2 Stereo setup This example describes how to set up a stereo passive filtered audio system with use of one AS2 100 This setup is shown in Figure A At first you have only a AS2 100 with no cables connected 1 2 SS 4 10 WW Connect the right speaker to the Amplifier out connector 13 Ready Plug in the power connector and switch the module to ON Power up the module by the control panel or remote Start the pc program Hupex filter design Plug in the USB cable assumed that you ve already installed the software as described in chapter Software installation Wait for automatic connection a popup is displayed as in Figure 7 If connection is not automatic the press the connect button If there is no response there is a problem with the USB connection or your operating system that can not detect the USB device Set the system to the desired setup for this example stereo left because the left speaker holds the AS2 100 module H Control panel Gap EIS File View Help Force Input Active input Setup Select Master position Auto Detect e Analogue C 2 Channel C Analogue C SPDIF C USB audio Left Q or Stereo USB audio C Bridged SICH Group Volume Update laii Connect C Mute al d Figure 14 When needed set the desired input for now just leave it Auto detect Note that in auto detect the USB source is selected when the module is connected to the pc Sw
4. designed in the Filter design Under view there con be switched between the control panel and the filter design window The following pages will give you a widespread instruction of the possibilities of the program 11 Control panel Filter design Ctrl F Control panel Ctrl C Bi Q Analogue C Analogue oO SPDIF C SPDIF C USB audio Qe USB audio Bridged Group Volume Update Ce EE Master position C Left C Right Mid Sub C Side Connect Mute EN Figure 8 v HY DEN Seerronics AS2 100 Hypex DSP Filter Designer D KE File Magnitude Impulse Step Channel 1 Tweeter Channel 2 Midrange Channel 3 Woofer Measured resi p Function Second order shelving filter C omo3w MAIN woofSdem dat z C omo3w MAIN woofS3em dat E Show Cie Centre Frequency 658 4 S Sr CORRER gt Common Settings j dor SC C LPF2 Q Factor 715 E 9 Gaii ES pel Ei C HPFl ain 0 3 SERE ES ai s s C HPF2 ain dB 42 5 invert Ce C Shet is Eech p y a amp Shelt2 pC atl v Show Filter v Show Filtered Driver C Asymmetric Shelf I ShowBiquad V Show Sum pes so C Boost Cut L Figure 9 Graph Area The magnitude tab shows the imported driver responses filters individual biquads individual filtered driver responses and the
5. out channel is not working it only adds outputs input left right In the final version the user is able to do some filtering on the sub out channel For the 2 channels are 13 biquad filters implemented but only 10 are displayed in software for now The first time the AS2 100 is used all biquads are zero so there are no filters installed Connecting any speakers and audio input at this point may cause some damage to them The controlling software on the pc does not jet work with wizards to set up your module in the right version but it can be made by several buttons in the control panel BUT take notice on what changes you make changing a 2channel modules to stereo setup can damage your speakers because both channels may be full range On a download of the filtering there is a popping sound This is not harmful and we will fix it asap On power up and power down there is a pop This is not harmful and we will fix it asap v hy sw AS2 100 System information L Lei R Ls2 S PDIF Gett in Digital RECON out receiver Link cable Right through IR control Figure 1 Description The AS2 100 is a plate amp for use in powered speaker systems As an active speaker controller a AS2 100 can form the basis of a powerful active two way monitor In stereo mode one AS2 100 will power an active master passive slave pair Finally the module may also be used as a one way 140W amplifier ATI signal processing incl
6. 02 0 003 0 003 0 003 0 003 0 003 0 004 0 004 0 004 0 004 0 004 0 005 0 005 0 005 Truncate Figure 11 Click truncate Anything currently outside the display is drawn in grey and not processed You will notice that in the frequency graph a portion of the low frequency response is also drawn in grey This is to remind the user that insufficient information is available to make any correction below this frequency A way of obtaining quasi anechoic low frequency measurements is making close up measurements Working with such measurements requires a good deal of interpretation but it is doable Important Avoid making any corrections for which no anechoic data is available If reflections are included they are guaranteed to dominate the measurement at low frequencies and you will end up making corrections for circumstances that are highly specific to the room in which the measurement was made Power response data can only be made in a proper echo chamber or preferably by collating a large number of anechoic off axis measurements A reverberant measurement in a normal live room just won t do The steps of loading and truncating data can be repeated at any time This can be particularly practical when combining close up and far field measurements during the filter design phase The window in Figure 11 shows the result of this The small knot of corrections made around 70Hz is based on close up data first loaded separately The LF section of
7. RC chip scans its input for whichever signal is active In a stereo setup and in digital mode the SPDIF through cable doubles as a master slave link obviating the need for the mini jack cable The mini jack cable remains functional though and does not have to be removed Audio performance data MBW 20kHz unless otherwise noted All filters set to unity Noise levels unweighted Item Symbol Min Typ Max Unit Notes Input level Vin 2 2 V Output level LS1 100 W Into 4 Ohms LS2 100 W Into 4 Ohms Signal Noise SNR 100 dB ADC 104 dB DAC Total harmonic THD N TBD distortion Noise Analogue sampling rate Fs 48 kHz Supported digital sampling Fs 32 44 1 48 kHz Allinput rates converted rates 88 2 96 192 to 48kHz Remote control The master unit is fitted with small control panel which is placed on the front of the loudspeaker cabinet Volume and standbu on is controlled by the pushbuttons and bu a infra red remote control When 2 AS2 100 modules are used only one control panel is needed cause the trigger communication between master and slave v hy sw AS2 100 Product overview O O AS2 100 UD cess D Technology Amplifier Out N h AA S PDIF Out Line in Right gt N 9 Er sik v Lac mor den o O 230V 50Hz Fuse 1 6AT O Figure 2 8 Overview of the connections on the front of the AS2 100 Funct
8. de you through setting up you 2 channel stereo system with the AS 100 picture of this kind of setup is given in Figure 5 The master module is always the one with the control panel connected First you got your 2 modules with no cables or speakers connected Master 1 Plug in the power connector and switch the module to ON 2 Power up the module by the control panel or remote 3 Start the pc program Hupex filter design 4 Plug in the USB cable assumed that you ve already installed the software as described in chapter Software installation 5 Wait for automatic connection a popup is displayed as in Figure 7 If connection is not automatic the press the connect button If there is no response there is a problem with the USB connection or your operating system that can not detect the USB device 6 Setthe system to the desired setup for this example 2 channel where the master represents the Left speaker 17 AS2 100 H Control panel File View Help Force Input Active input Setup Select Auto Detect Analogue 2Channel C Analogue solr C Stereo C SPDIF C Mid Sub C USB audio USB audio C Bridged C Side Group Volume Update C mue Sg eeu Figure 12 7 When needed set the desired input for now just leave it Auto detect Note that in auto detect the USB source is selected when the module is connected to the pc Switch to the Filter design Window under view or press ctri f F
9. eapons of choice are shelving filters and boost cut sections A sharp peak followed bu an equally sharp dip can be corrected using a second order shelving filter with a high Q Exercise care when deciding what to correct When correcting for diffraction errors do not exceed a Q of 3 lest the cure be worse than the ailment Errors that are caused 16 v hy sw AS2 100 inside the driver or internal cabinet resonances that emanate through the same diaphragm may be corrected ruthlessly provided the measurement has sufficient resolution to pin them down As a rule of thumb sharp dips are diffraction artefacts while sharp peaks are caused by the drivers themselves Exceptions are room resonances if the response is not correctly truncated and diffractions on repetitive patterns The second step is designing the actual crossover filters All the usual strategies work Delaying higher frequency drivers with respect to lower frequency ones is a powerful alternative to using asymmetric slopes and yields substantially improved coherence through the crossover region Download Under download the user can press load DSP to download its designed filters to the AS2 100 NOTE For this version channel1 Tweeter represents the high or Left channel and Channel 2 Midrange represents the low or Right channel Channel 3 is not jet implemented for the AS2 100 Examples Example 1 2 channel stereo setup This example will gui
10. etup Connect the module to your pc by a USB cable and select on witch side of the room your master module will be the speaker with the AS2 100 When your master is the left channel the slave will become the right channel When you want to set the master as right channel with analogue input you will have to change the input cinches left in the tight cinch and right in the left This is because only the right channel is linked trough so if you want the left channel to be linked trough you just switch left and right For digital sources the left and right channel are linked Stereo audio in S Left speaker Control Fe L Che Oo Panel Figure 4 Bridged setup Connect the module to your pc by a USB cable and select where the master module is placed master module is left or right audio or functions as a subwoofer When you use 2 AS2 100 for a stereo bridged setup you will also have to initialise the second slave module see example in the last chapter of this document 8 v hy sw AS2 100 In bridged mode the jumper see figure 2 must be placed and the speaker must be connected between J4 speaker and J2 speaker When you want to set the master as right channel with analogue input you will have to change the input cinches left in the right cinch and right in the left This is because only the right channel is linked trough so i
11. f you want the left channel to be linked trough you just switch left and right For digital sources the left and right channel are linked 2 Channel Connect the module to your pc by a USB cable and select what kind of 2 channel you want to setup When you want to set the master as right channel with analogue input you will have to change the input cinches left in the right cinch and right in the left This is because only the right channel is linked trough so if you want the left channel to be linked trough you just switch left and right For digital sources the left and right channel are linked An example is given in the last chapter of this document trigger Stereo right ch audioin Control Panel Figure 5 When 2 modules are used these two can be linked by a trigger cable This cable holds device data and also carries a audio channel on analogue source If the digital board is installed then the SPDIF link cable can be used to communicate between the 2 modules This cable is placed from master SPDIF out to slave SPDIF in cinch The trigger cable is now longer needed in this setup On USB audio input on the master the SPDIF output is also used for linking master to slave Software installation System requirements v hy sw AS2 100 Pentium class or higher H 64MB RAM USB1 0 or higher Tested on Wind
12. ill in your biquads with the desired filters in this preliminary software the high channel is channel 1 and the low channel is channel 2 10 Download the filters to you module under Download or press ctrl F9 E Hypex DSP Filter Designer C Eek Fie View TE Help 0 c Magnitude Impulse Step Channel 1 Tweeter Channel 2 Midrange Channel 3 Woofer Function Second order lowpass filter C Unity Cutoff Frequency T0000 C LPFI Common Settings Biquad Section Sie Q Factor 576 Si C6 Delay us 5 C un Gain 48 oo ax s C HPF2 jy T Invert c3 cs C Shel C Set V Show Filter v Show Filtered Driver ran C Asymmetric Shelf Show Biquad IV Show Sum CSC Boost Cut Figure 13 m 18 D v hy sw AS2 100 11 12 Slave IM 8 9 When download is completed you can power down the module Start with the SLAVE module Start the pc program Hupex filter design Or go back to the control panel ctrl c if the program is still running Plug in the power connector and switch the module to ON Plug in the USB cable assumed that you ve already installed the software as described in chapter Software installation Wait for automatic connection now the program detects a slave module this is shown in a popup If connection is not automatic the press the connec
13. ion Amplifier output for slave speaker in stereo setup Analogue input left channel Analogue input right channel Subwoofer output On Off switch IN EA a USB control input v hy LU AS2 100 9 Master trigger output slave trigger input Right channel trough 10 Main Fuse 11 230 volt input Digital version only 2 SPDIF audio input 3 SPDIF audio output Audio trough for slave module 8b USB audio input Figure 3 Overview of the connections on the back of the AS2 100 Function 1 Transformator connection 2 JP1 Bridge jumper 3 J4 Stereo Left channel output 2 channel Low channel Pin1 left Speaker Pin 2 right Speaker 4 J2 Stereo Right channel output 2 channel High channel Pin1 left Speaker Pin 2 right Speaker 5 J3 Connection of bindingspost Physically the same as connector J2 6 Transformator connection T Control panel flat cable connector v hy sw AS2 100 Setting up your system Before you can use the AS2 100 in your particular setup you first have to set the right settings This is done by pc software called Hypex DSP filter design Please do not connect any speakers to your system jet When uou want to set up a system with the AS2 100 you apparently know what you want So with this information you can setup your system as follows Hardware part Stereo s
14. itch to the Filter design Window under view or press ctrl f Fill in your biquads with the desired filters in this preliminary software the left channel is channel 1 and the right channel is channel 2 For the stereo setup you don t need to set any filtering but you got the ability to use them Even when you don t want to use the filters you still need to set them Press download or use ctrl F9 When the download is complete the setup is done Present your audio source 20 v hy sw AS2 100 Now the system is fully setup and can be controlled by the control panel remote control or by connecting the module to your pc From now on you can update your filters at any time just repeat the steps of this example 21
15. ows XP and Vista All files are compressed in the setup zip file This zip file contains 2 DLL files for communication and a EXE file which represents the Hypex DSP filter design program 1 Unzipthe setup zip file on your hard disk 2 Open the Hypex DSP filter design EXE by double clicking the file Control panel Now the program is ready for use You will ER Control panel C Efe see the following window called the control Fie View He ee pues panel Force Input Active input Setup Select Master position c d e Analogue Ze 2 Channel Analogue z oF C Stereo C SPDIF C USB audio Q USB audio C Bridged Group Volume Update B Connect Mute EN Figure 6 When the program is running connect your AS2 100 to your pc by the USB cable Windows will automaticallu detect and install the AS 2 100 and the USB audio device When the installation is done the connected AS2 100 Master connected window will appear and the connection light will turn green You can also manually make a connection by the connect button on the bottom right of the control panel Figure 7 Now you can adapt the settings of the AS2 100 real time through USB On the left of the control panel you see the Force input and active input groups This shows you the settings of the audio inputs of the AS2 100 and lets you control these inputs Audio can be provided in 3 ways analogue SPDIF and USB audio The selection of any of these inpu
16. rements The filter designer computes a gain offset based on all loaded responses to center them collectively on the vertical scale Truncating response data Switch to the impulse or step response graph Magnitude Impulse Step 0 0 005 0 01 0 015 0 02 0 025 0 03 0 035 0 04 0 045 0 05 0 055 0 06 0 065 0 07 0 075 0 08 0 085 0 09 0 095 0 1 Truncate Figure 10 The first echo is apparent at 5ms Zoom in until you see only the anechoic portion of the impulse response Dragging the mouse left button down from left to right marks a zoom area Dragging from right to left zooms out Dragging with the right button down pans the plot left and right 14 v HY pex Seerronics AS2 100 Magnitude Impulse Step 0 002 0 002 0 002 0 002 0 0
17. sum Colour Function Blue thin Measured woofer response Green thin Measured midrange response Red thin Measured tweeter response Blue thick Filtered woofer response Green thick Filtered midrange response Red thick Filtered tweeter response 12 v hy LU i AS2 100 Light blue thick Response of filter selected channel only Orange thick Response of selected biquad Black thick Sum response Having all of these on at the same time quickly produces an intractable mess so these graphs can be separately enabled or disabled in the filter definition area The impulse or step tabs show the time domain response of the imported drivers and the sum response and are used to demarcate the anechoic portion Filter Definition Area The three channel tabs labeled Tweeter Midrange and Woofer are functionally identical The top left frame is used to import response files The select button opens a file The show checkbox turns display of the measured graph on or off The Common Settings box controls global gain for each channel delay and the visibility of plots Each filter has up to 10 biquads selected using the Biquad Section radio buttons in the middle To the right is a settings area specific to the type of function selected Unused biquads are set to unity The selected biquad is edited by selecting a function and setting relevant parameters Settings window
18. t button If there is no response there is a problem with the USB connection Switch to the Filter design Window under view or press ctrl f Fill in your biquads with the desired filters or use the same filters as the master module In this preliminary software the high channel is channel 1 and the low channel is channel 2 Download the filters to you module under Download or press ctrl F9 When download is completed you can power down the module and disconnect the USB cable Master and Slave are now set up as a 2 channel stereo system Final setup When both modules are installed it is time to complete your setup Ready First connect your speakers as explained in chapter Product overview Connect the trigger cable mini jack or SPDIF cable between both modules depending on the used audio source Power up master and slave module Turn on the master bu control panel or remote Lower you source volume prevent loud start up volume Connect uour source to the AS2 100 Now the system is fully setup and can be controlled by the control panel remote control or by connecting the module to your pc From now on you can update your filters at any time just repeat the Master and Slave steps f your slave module is not turned on by the master try to power down the slave turn the master off wait 5 seconds power up slave and turn the master back on When there is something that does not work tru to repeat the installation 19 v hy sw
19. the test mule is quite smooth apart from one internal standing wave 15 sem Y h ka n AS2 100 Designing filters Biquad function Parameters Use Unity Section is not used LPF1 Cut off frequencu alwaus First order lowpass 3dB LPF2 Cut off frequency Second order lowpass A Q of asymptotically 0 71 corresponds to Q butterworth 0 5 corresponds to LR2 Two identical sections with a Q of 0 71 form an LR4 filter HPF1 Cut off frequency always First order highpass 3dB HPF2 Cut off frequency Second order highpass A Q of asymptotically 0 71 corresponds to Q butterworth 0 5 corresponds to LR2 Two identical sections with a Q of 0 71 form an LRA filter Shelf1 Centre Frequency halfway First order shelf Useful for point baffle step correction Gain Direction Centre Frequency halfway Second order shelf Useful for Shelf2 point correcting internal cabinet Gain resonances and for the Q midband peak dip combo of Direction most midwoofer speakers Asymmetric Pole frequency and Q Equalising the bottom end of Shelf Zero frequency and Q closed box woofers with large magnets Boost Cut Centre frequency Dip peak filter For peaks Q is Q gain defined by the poles For dips Q is defined by the zeros Thus the same filter with opposite gains will cancel The first step is equalising the magnitude responses of the drivers flat over their entire useable frequency range The w
20. ts can be automatic auto detect This means that when any of the inputs is presented there will be switched to this channel automatically This is done by setting the analogue input as the standard source During analogue in the other two inputs are scanned for any valid signal The first channel that contains any valid audio is selected and becomes the new input source But if you put in the USB cable 10 MV Y h ka ab AS2 100 but you want to use the analogue input you can force the analogue input to be used This can be done for all inputs the options Anal ogue SPDIF and USB Audio When the module selects one of the inputs this is shown by the active input lights Under the Setup select part the system setup can be selected There can be chosen between 2 channel Stereo Bridged Master on the left Master on the left Master on the left Master on the right Master on the right Master on the right Mid Sub L R Sub L R Side L R The last thing that can be controlled in this window is volume This can be done by setting the scrollbar to a desired position and the pressing enter or by typing the value in the volume field the value is send when pressed enter All of the configurations made here will be redirected from master to slave when presented So there is no need to connect the slave module to the pc Filter design When you want to make some filters for your module they can be
21. uding volume control is done using the on board DSP digital signal processor Figure 1 shows the block diagram of the amplifier When two modules are used the second unit slaves to the first unit master through a link cable The link cable a stereo mini jack cable carries both the right audio channel and control data This way both units respond to the master s control panel A PC controls the AS2 100 through the USB port This connection is used to upload the configuration and filter settings An optional board permits use of the USB link for 4 v hy sw AS2 100 audio as well as an SPDIF link In digital mode master slave linking is done through the SPDIF in out connections instead of the mini jack cable Hardware Architecture The standard version of the AS2 100 has a stereo analogue audio input This analogue signal is converted to digital processed bu the DSP and then converted back to analogue A microcontroller controls the DSP reads the control panel and communicates with the PC and or another AS2 100 that may be attached Digital audio input The optional digital input board plugs into the main PCB and carries two RCA connectors SPDIF in and SPDIF through Incoming SPDIF is linked through directly to the output and sent to the DSP through an asynchronous sample rate converter ASRC for jitter removal The USB part adds a hub and an audio device which in turn also transmits audio over the ASRC to the DSP The AS

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