Forum Replies Created
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10 December 2023 at 8:15 pm #748I understand IIR(biquad) filter changes gain and phase
all pass filter doesnt change amplutude, but phase changed.That’s correct.
FIR(Finite impulse Response)filter, amplitude changes, but phase does not change.
with higher tap, create long delay.That is not correct. A FIR filter can also change phase. (The FIR filter type you are describing is a “linear phase” filter which is subset of what FIR filters can do.) Take a look at the following guide; especially section 7.
I imported csv file into Symetrix, it looks like bunch of PEQ collection(IIR filter)
If the FIR filter response looks like a collection of PEQ’s, that is probably because you have used some PEQ’s on the “FIR Magnitude Adjust” tab, to make the FIR filter. The responses of all five “FIR..” tabs are combined to make the FIR filter. Please take a look at the two tutorials I mentioned in my first message (above).
Here is an example of a .._summary.txt file. It lists the filters from the “IIR Filters” tab, and basic information about the FIR filter file (which is saved separately).
Filename: /Users/<username>/Downloads/FIRfilter__SUMMARY.txt Project: (none) FIR Designer 2 version: 4.0.1 PROCESSOR SETTINGS Sampling Rate: 48000 Hz Gain: 0.000 dB Flip Polarity / Invert: No GPD Tab Delay: 0 samples, 0.000 milliseconds IIR (Generic) HPF_BUTTERWORTH, 100 Hz, Order 2, ENABLED b0:0.9907866979404248 b1:-1.9815733958808497 b2:0.9907866979404248 a0:1.0000000000000000 a1:-1.9814885091445693 a2:0.9816582826171302 BAND_PASS, 364.529 Hz, BW 2.000 (Q 0.667), -6.162 dB, ENABLED b0:0.9753337038790250 b1:-1.9007342759081824 b2:0.9275665093063239 a0:1.0000000000000000 a1:-1.9007342759081824 a2:0.9029002131853491 BAND_PASS, 3122.277 Hz, BW 0.863 (Q 1.647), -5.312 dB, ENABLED b0:0.9340057741878747 b1:-1.5705317765303994 b2:0.7774914181148489 a0:1.0000000000000000 a1:-1.5705317765303994 a2:0.7114971923027236 HIGH_SHELF, 8384.027 Hz, BW 1.900 (Q 0.707), 3.612 dB, ENABLED b0:1.2973957851235292 b1:-0.7856595921197735 b2:0.1733106061768412 a0:1.0000000000000000 a1:-0.4018695414139699 a2:0.0869163405945669 FIR FILTER Sampling Rate: 48000 Hz Filename: /Users/<username>/Downloads/FIRfilter.fdt Length: 400 samples, 8.333 milliseconds Delay: 200 samples, 4.167 milliseconds
21 November 2023 at 7:29 am #742I just heard back from Lab Gruppen. The version of IPX Controller that supports LPIF import has been delayed but should be ready soon. (I don’t have an ETA.)
Best regards,
EA Support
21 November 2023 at 6:15 am #741Hi Lukas,
I’m checking with Lab Gruppen and will reply again once we know more.
Best,
EA Support
17 November 2023 at 7:20 pm #739Hi there
Can the software create FIR filters for BSS Blu 100? Are there any instructions how to load the filter into a Blu 100? Or does it work like the crown amps?Which license do I need. This is currently for a one time adjustment in a studio.
ThanksPer the page
BSS loads a FIR filter as a CSV file. From any of our products, select “CSV file (column, decimal)” as the export format.
Open a BSS device in Audio Architect, drag a FIR filter block onto the workspace, load the CSV file into the block and wire the FIR block input and output to the device IO blocks.
As to which product, it depends exactly what you’re going to do. FIR Creator or FIR Creator EX should be adequate.
This page gives one example of how to generate a FIR filter a whole cabinet.
Also I’d suggest downloading a demo of FIR Creator EX and taking a look at the preloaded example project.
Regards,
EA Support
8 November 2023 at 7:52 pm #732I doubt you can load 12 & 24 kHz filters at all. If it could load these sample rates, keep in mind there’s a maximum tap length available for FIR so the 12 kHz filter – upsampled to 48 kHz – may get truncated, which could dramatically change the filter response.
The Lake FIR 3-way and FIR XP modules are the only modules I’m aware of that use those lower sample rates.
Best,
EA Support
8 November 2023 at 6:48 pm #729I don’t know. You’ll have to try it. The sample rate is included in the GKF file that we export for Dynacord, so IRIS-Net should be able to tell you if the sample rate is not supported.
Take a look at EV and Dyncord on
From the 2nd link: “Note: IRIS-Net appears to load both 48 kHz and 96 kHz FIR filter files, and convert them appropriately to the sample rate of the processor.”
If there’s information missing, let us know and we’ll add it.
Best,
EA Support
7 November 2023 at 1:37 pm #727What DSP is this? The file looks like a format we can implement to export from our products.
Here’s a workflow to get to the FIR data.
1. Copy the c0= ….. c383=”-1.497382E-07″ stuff to a text editor and use find/replace to remove all the ”
2. Copy the c0= ….. c383=-1.497382E-07 from the text editor into an empty worksheet in Excel
3. In Excel, select “Data” “Text to Columns” and use a space ” ” delimiter to break the single cell into 384 cells in a row.
4. Copy the 384 cells
5. On a vacant cell in Excel, right-click and select “Paste Special” “Transpose”. You’ll now have a column starting with c0=1.729377E-10 in the top cell.
6. Select the 384 cells (in the column) and select “Data” “Text to Columns” with an equals sign = as a delimiter. Now you have two columns; one starting with c0 and one with 1.73e-10.
7. Select all the number cells, right-click and select “Format” “Scientific” with 6 decimal places.
8. Copy the 384 cells back to a text editor and save as a TXT file. The results follow below.
9. Start “FIR Designer” and don’t load anything on the Import tab. On the Target tab and File sub-tab, press Load to load the TXT file. Uncheck Magnitude only and Phase only. Press “Find Peak”.
10. In “FIR Designer”, on the Target tab and Curve sub-tab, uncheck “Use”.
Now you have the filter loaded as a target and you can use the rest of the FIR Designer workflow to make a new FIR filter that either matches the loaded filter, or is slightly different to the loaded filter.
1.729377E-10
1.660994E-09
4.847680E-09
9.824653E-09
1.651504E-08
2.464442E-08
3.372249E-08
4.303874E-08
5.167486E-08
5.853556E-08
6.239859E-08
6.198304E-08
5.603370E-08
4.341751E-08
2.322641E-08
-5.120034E-09
-4.178048E-08
-8.641439E-08
-1.381300E-07
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2.311606E-02
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3.163840E-02
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4.063381E-02
4.514824E-02
4.956610E-02
5.379218E-02
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3.615452E-02
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3.770392E-03
3.546575E-03
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-1.278850E-03
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6.403283E-07
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6.894933E-07
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6.118250E-07
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4.770547E-07
3.972093E-07
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2.293966E-07
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-1.497382E-07
21 October 2023 at 2:53 am #719The files have been updated. Please try downloading again.
Regards,
EA Support
4 October 2023 at 8:10 am #717I can confirm we see a difference on Windows, but not on macOS.
In FIR Designer M version 4 we implemented significant speedups to many of the underlying computations. These have not yet been ported into FIR Designer but will be in FIR Designer version 4.
Regards,
EA Support
4 October 2023 at 6:13 am #714Exactly which versions of FIR Designer and FIR Designer M are you comparing and on which OS (macOS or Windows)? Also, please email us a FIR Designer project and FIR Designer M system that shows the effect so that we can investigate quickly.
Best regards,
EA Support-
This reply was modified 2 years, 7 months ago by EA Support.
13 September 2023 at 8:27 pm #708Yes, generally speaking, IIR filters are minimum phase. However more importantly they are much more efficient at filtering, particularly at low frequencies where an equivalent FIR filter would require 1000’s of taps. I recommend you read:
>> If so, how am I supposed to differentiate them from mixed responses e.g. room responses?
It depends on why you want to differentiate between minimum phase and mixed or non-minimum phase components.
The FIR Creator workflow lets you do whatever you like. You can push the measurement towards target with only minimum phase filters (using the IIR, FIR Mag Adjust and FIR Auto Mag) or you can use additionally use the FIR Phase Adjust and FIR Auto Phase tabs to correct for non-minimum phase components. It’s completely up to you. We don’t advocate any particular method. We just provide the tools to enable you to try whatever approach you like.
Best regards,
EA Support
4 September 2023 at 7:12 pm #704Sorry, 1.0.0, 1.0.1, 1.0.2 and 1.0.3 contain a bug which could give you wrong measurements. We won’t be providing download links for these. This bug was fixed in 1.0.4.
4 September 2023 at 6:43 pm #702I can’t explain why 1.0.2 stopped working for you.
We’ve checked the builds. SM version 1.0.0, 1.0.2 and 1.0.3 were built with Qt 6.4, which does support Catalina. SM 1.0.4 and 1.0.5 were built with Qt 6.5.x, which doesn’t support Catalina. We always intended SM to be on Qt 6.5.
SM version 1.0.4 (built with Qt 6.5.1) fixed a problem with an intermittent glitch in the transfer function which all users need. Version 1.0.5 addressed problems in Qt itself and was built with Qt 6.5.2.
All this to say, we can’t go back and build 1.0.5 with older versions of Qt, so unfortunately you’ll need to either update macOS, or find a MS Windows PC.
Best regards,
EA Support
4 September 2023 at 6:31 am #700Sorry, no. Apple keep moving forward quickly with their OS releases and the GUI toolkit we subscribe to – Qt – moves with it.
Regards,
EA Support
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This reply was modified 2 years, 7 months ago by
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