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Hosted Forums => foobar2000 => 3rd Party Plugins - (fb2k) => Topic started by: k2k on 2013-11-26 22:53:36

Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2013-11-26 22:53:36
MathAudio Room EQ for Foobar2000
(http://mathaudio.com/images/mathaudio-room-eq.png)

Download: mathaudio.com/download.htm (http://mathaudio.com/download.htm)
Title: MathAudio Room EQ for Foobar2000
Post by: edwardar on 2013-11-26 23:30:51
This looks magnificent.  I looked into room EQ some years ago, but the whole process was so complicated, I never got round to it.  I did buy a Radioshack Sound Level Meter for this purpose though.  Any chance I could use it with this plugin (or a future version)?
Title: MathAudio Room EQ for Foobar2000
Post by: Sandrine on 2013-11-26 23:37:01
Why is the plug-in an .exe? No thanks.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2013-11-27 00:36:31
The plug-in is packed into an 'exe' installer because it includes a Help manual. The  package also includes a standard Windows uninstaller, so you can easily remove all installed files from your PC.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2013-11-27 01:50:42
This looks magnificent.  I looked into room EQ some years ago, but the whole process was so complicated, I never got round to it.  I did buy a Radioshack Sound Level Meter for this purpose though.  Any chance I could use it with this plugin (or a future version)?

Yes, you can use it as a measurement microphone with Room EQ. Try to find a calibration (correction) file for your model and copy it to the Documents -> MathAudio Room EQ folder. It will improve the accuracy of your measurement.
Title: MathAudio Room EQ for Foobar2000
Post by: eahm on 2013-11-27 05:20:25
Why is the plug-in an .exe? No thanks.

You can extract it with 7-Zip (or 7-Zip Portable (http://portableapps.com/apps/utilities/7-zip_portable)) and use just the DLL.
Title: MathAudio Room EQ for Foobar2000
Post by: xnor on 2013-11-27 05:23:15
Avast AV detected uninstall.exe as malware.
Title: MathAudio Room EQ for Foobar2000
Post by: kode54 on 2013-11-27 07:20:10
From the icon, it appears to be a bog standard NSIS uninstaller. From what I've found from basic searching, to sign the uninstaller, you need to compile your own uninstaller and sign it, then bundle that with the installer instead of scripting it to generate one on the fly.

https://www.virustotal.com/en/file/d34a0b13...sis/1385536852/ (https://www.virustotal.com/en/file/d34a0b13f2f6be6e7645eecf7eb67bac9f083467cb8e6107fea1001f367d3860/analysis/1385536852/)

I'm calling false positive due to unsigned code.

Also, just extracting the component will not work, because it appears to be nothing more than a VST wrapper, as the installer also places the equalizer VST in a separate directory, alongside the documentation and the uninstaller.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2013-11-27 18:00:21
Avast AV detected uninstall.exe as malware.

uninstall.exe doesn't contain any malware. This is a false positive error of AVAST.
Title: MathAudio Room EQ for Foobar2000
Post by: oruam57 on 2013-11-27 18:35:58
I got the plugin installed and working.

I did some measurements and got a reasonable looking frequency response.

Unfortunately, I do not hear any difference between the Bypass and Room EQ positions (both with music and sinusoidal tones) 


 

Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2013-11-27 18:57:19
You can extract it with 7-Zip (or 7-Zip Portable (http://portableapps.com/apps/utilities/7-zip_portable)) and use just the DLL.

This method will not work because foo_room_eq.dll depends on other Room EQ files that are located in another directory. It was not practical to install all Room EQ files into the "components" directory of Foobar2000 because it could create some delay on startup of Foobar2000 (Foobar2000 checks all files in its "components" directory one-by-one every time when you start it up).

Room EQ applies well known and very reliable NSIS installer/uninstaller which is used in thousands of software products around the world. Just use it and don't worry: Room EQ does not contain any malware.

Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2013-11-27 19:10:23
I got the plugin installed and working.

I did some measurements and got a reasonable looking frequency response.

Unfortunately, I do not hear any difference between the Bypass and Room EQ positions (both with music and sinusoidal tones)

It is impossible. Play music and move the vertical slider up and down in the Room EQ mode. You will hear noticeable changes in timbre and volume of the sound.
Title: MathAudio Room EQ for Foobar2000
Post by: oruam57 on 2013-11-28 13:35:41
I got the plugin installed and working.  I did some measurements and got a reasonable looking frequency response.  Unfortunately, I do not hear any difference between the Bypass and Room EQ positions (both with music and sinusoidal tones)
It is impossible. Play music and move the vertical slider up and down in the Room EQ mode. You will hear noticeable changes in timbre and volume of the sound.
 

Sorry, I misunderstood the function of the vertical slider. Now I see that the frequency response is corrected for the part above the white line only.







Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2013-11-28 19:42:27
Sorry, I misunderstood the function of the vertical slider. Now I see that the frequency response is corrected for the part above the white line only.

Yes, Room EQ removes everything above the dashed line while leaving the notches below the dashed line. This is one of the most important features of this plug-in. Conventional room correction systems often try to “equalize everything”. As a result, they create large excursions of the speaker diaphragm at certain frequencies. The large excursions of the speaker diaphragm create non-linear distortion and the sound becomes “dirty”. The vertical slider of this plug-in allows you to choose between “full” and “partial” types of correction.  Consequently, you can get the best possible sound. 

Please note that the sound of your speakers becomes more silent when you remove the room resonances. Don't forget to move left the “Bypass signal volume” slider to make the volume of the bypass signal equal to the volume of the processed signal. After that you will be able to correctly compare the quality of the processed sound with the quality of the original sound.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2013-12-16 20:22:13
News
A new version of the plug-in has just been released. The new version includes a custom target curve feature. This new feature can be used for drawing your own reference frequency response.
Title: MathAudio Room EQ for Foobar2000
Post by: pro_optimizer on 2013-12-21 07:33:21
News
A new version of the plug-in has just been released. The new version includes a custom target curve feature. This new feature can be used for drawing your own reference frequency response.


Hi k2k, fantastic work!

To top it off, maybe you could offer correction curves for a few cheap stock microphones (Best Buy, etc.). Would be more than willing to pay $1 a piece.
For example, here's a quite popular one: http://www.amazon.com/Logitech-980240-0403.../dp/B00022TNHM/ (http://www.amazon.com/Logitech-980240-0403-Desktop-Microphone/dp/B00022TNHM/)

Title: MathAudio Room EQ for Foobar2000
Post by: muxx on 2013-12-23 17:47:52
Hello, I have a Behringer ECM8000 microphone. I let it calibrate and got a correction file like these (http://lasip.hifi-selbstbau.de/downloads/MicCalDemo.sen).
Can the software read ASCII (text) microphone correction files with file extensions like .sen/.mic/.cal etc. ?
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2013-12-24 11:07:29
Hi k2k, fantastic work!

To top it off, maybe you could offer correction curves for a few cheap stock microphones (Best Buy, etc.). Would be more than willing to pay $1 a piece.
For example, here's a quite popular one: http://www.amazon.com/Logitech-980240-0403.../dp/B00022TNHM/ (http://www.amazon.com/Logitech-980240-0403-Desktop-Microphone/dp/B00022TNHM/)

Your example mic is not so cheap. Just compare its price ($35) with the price of a professional calibrated measurement microphone like EMM-6 (http://www.parts-express.com/pe/showdetl.cfm?partnumber=390-801) ($48) or UMIK-1 (http://www.minidsp.com/products/acoustic-measurement/umik-1) ($75).
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2013-12-24 11:15:38
Hello, I have a Behringer ECM8000 microphone. I let it calibrate and got a correction file like these (http://lasip.hifi-selbstbau.de/downloads/MicCalDemo.sen).
Can the software read ASCII (text) microphone correction files with file extensions like .sen/.mic/.cal etc. ?

Yes, Room EQ can read ASCII (text) microphone calibration files if you save them with the extension .CAL or .FRD.

Use "Save As" in your browser to save the text of the calibration file as a text file (e.g. calibration.txt). After that change the file type from “txt” to “cal”: open the text file in Notepad, click File – Save as -  Save as type – All Files, then type the new name (e.g. calibration.cal) in the “File name” edit window and click the “Save” button.

Copy the calibration file to the Documents -> MathAudio Room EQ folder. Then exit Foobar2000 and start it once again. The name of the calibration file will be shown at the top right corner of the Room EQ graphical area.
Title: MathAudio Room EQ for Foobar2000
Post by: Porcus on 2014-01-06 20:53:22
Hm. Anyone know whether the IMM-6 ("I", not "E") is good for anything? Small and practical to bring around ... and when a few friends have borrowed it I can just buy another one.
http://www.amazon.com/Dayton-Audio-iMM-6-C...t/dp/B00ADR2B84 (http://www.amazon.com/Dayton-Audio-iMM-6-Calibrated-Measurement/dp/B00ADR2B84)
Title: MathAudio Room EQ for Foobar2000
Post by: GABYBARO on 2014-01-10 11:09:01
HELLO,
Room correction mode, foobar when playing a song, I hear a beep every 5 to 10 seconds.
Es it possible
Hi
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2014-01-10 20:41:26
Hm. Anyone know whether the IMM-6 ("I", not "E") is good for anything? Small and practical to bring around ... and when a few friends have borrowed it I can just buy another one.
http://www.amazon.com/Dayton-Audio-iMM-6-C...t/dp/B00ADR2B84 (http://www.amazon.com/Dayton-Audio-iMM-6-Calibrated-Measurement/dp/B00ADR2B84)

This mic is designed to be used on iPhones and Android phones, not on a PC. If you want to use it with your PC, you will need to use an adapter cable to go from TRRS (4 wires) to TRS (3 wires). Besides, you will need to use the Mic Input of your PC, which can be less accurate than the Line Input. You may want to look at Dayton Audio UMM-6 (http://www.parts-express.com/dayton-audio-umm-6-usb-measurement-microphone--390-808) or MiniDSP UMIK-1 (http://www.minidsp.com/products/acoustic-measurement/umik-1) instead.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2014-01-10 20:43:58
HELLO,
Room correction mode, foobar when playing a song, I hear a beep every 5 to 10 seconds.
Es it possible
Hi

There are two versions of the Room EQ plug-in: Room EQ for Foobar2000 and Room EQ VST. Room EQ for Foobar2000 is free and works without any beeps. Room EQ VST is designed to be used with professional audio workstations (DAW) and it is not free (demo beeps). You can use Room EQ VST with Foobar2000, but you don't need to do it because Room EQ for Foobar2000 includes all features of Room EQ VST. Just install Room EQ for Foobar2000 and you will have no beeps.
Title: MathAudio Room EQ for Foobar2000
Post by: eahm on 2014-01-11 01:50:57
You can extract it with 7-Zip (or 7-Zip Portable (http://portableapps.com/apps/utilities/7-zip_portable)) and use just the DLL.

This method will not work because foo_room_eq.dll depends on other Room EQ files that are located in another directory. It was not practical to install all Room EQ files into the "components" directory of Foobar2000 because it could create some delay on startup of Foobar2000 (Foobar2000 checks all files in its "components" directory one-by-one every time when you start it up).

Room EQ applies well known and very reliable NSIS installer/uninstaller which is used in thousands of software products around the world. Just use it and don't worry: Room EQ does not contain any malware.

It's not because of worries, I am sure I can trust you. I don't install anything (unless I really really need to), always make or use portable versions. This way I fully use ONLY one drive and keep the OS drive (SSD) clean and at the maximum of speed and efficiency and it's better for backup purposes, the folder/drive is just one.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2014-01-12 19:14:12
It's not because of worries, I am sure I can trust you. I don't install anything (unless I really really need to), always make or use portable versions. This way I fully use ONLY one drive and keep the OS drive (SSD) clean and at the maximum of speed and efficiency and it's better for backup purposes, the folder/drive is just one.

MathAudio Room EQ is not able to slow down your system. However, if you want to keep everything under your control, you can use the following manual method of installation:
1. Download mathaudio-room-eq-for-foobar2000.exe from http://mathaudio.com/download.htm (http://mathaudio.com/download.htm)
2. Open it with 7-Zip (http://www.7-zip.org/).
3. Copy foo_room_eq.dll to the "Program FIles (x86)\foobar2000\components" folder (Windows x64) or "Program FIles\foobar2000\components" folder (Windows x32/x86).
4. Open the "$SHELL[17]" folder and copy the "MathAudio" folder with all its content to the "Program FIles (x86)"  directory (Windows x64) or "Program FIles" directory (Windows x32/x86).
Please note that you will need to manually delete all these files if you will want to uninstall the plug-in.
Title: MathAudio Room EQ for Foobar2000
Post by: giro1991 on 2014-04-09 13:19:18
thank you for this plugin!
Title: MathAudio Room EQ for Foobar2000
Post by: eahm on 2014-04-09 17:10:05
MathAudio Room EQ is not able to slow down your system.

Of course not, Windows is

It's really a choice more than the slowing down, with modern PCs takes much more than that to "slow down" a system. I ONLY use portable apps for 100% or control/management over the data, apps, backup.
Title: MathAudio Room EQ for Foobar2000
Post by: giro1991 on 2014-04-28 16:41:39
Hi, this thing really improves the sound

Just a suggestion however, would it be possible to add an output option "DSP list", so that the test tone outputs through foobar and through any proceeding DSPs in the list? this would be cool for comparing.
Thanks!
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2014-06-29 13:41:09
Hi, this thing really improves the sound

Just a suggestion however, would it be possible to add an output option "DSP list", so that the test tone outputs through foobar and through any proceeding DSPs in the list? this would be cool for comparing.
Thanks!

The Room EQ measurement program sends the sweep sound directly to the sound card. If we would process the sweep sound with any DSP effects, we could get incorrect measurement results. However, you can use Room EQ with any other DSP effects during the playback of audio files. Just make sure that Room EQ is the last effect in your "Active DSPs" list.
Title: MathAudio Room EQ for Foobar2000
Post by: giro1991 on 2014-07-01 10:27:23
Hi, thanks for response,

Well, I ask because in order for maximally flat response, I need to apply linkwitz transfrom to all signals getting sent to the subwoofer, including sweeps.

A sweep without linkwitz transfrom active, the sub does not portray flat response when being tested.

I could apply the transfrom to sound card eq, so that the sweep processes through that... but was curious if a 'dsp list' path could be added... 


Is it also possible to export the curve to use with winamp in some way?



Again thanks for this - REW really is complex to set up.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2014-07-02 12:56:25
Hi, thanks for response,

Well, I ask because in order for maximally flat response, I need to apply linkwitz transfrom to all signals getting sent to the subwoofer, including sweeps.

A sweep without linkwitz transfrom active, the sub does not portray flat response when being tested.

I could apply the transfrom to sound card eq, so that the sweep processes through that... but was curious if a 'dsp list' path could be added... 


Is it also possible to export the curve to use with winamp in some way?



Again thanks for this - REW really is complex to set up.


There is no easy way to export the curve to Winamp.
Do you want to implement a digital Linkwitz transform?
Title: MathAudio Room EQ for Foobar2000
Post by: giro1991 on 2014-07-03 10:30:47
hi and Yes,
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2014-07-03 20:44:02
hi and Yes,

The VST version of this plugin can help you to process the sweep sound if you need to. The demo version is enough to make the measurement and to save the plot as a preset. Then you can load the preset to the Foobar2000 version of the plugin. You can use the VST version of the Room EQ plugin with the demo version of Reaper or any other DAW. Reaper allows you to include any effects into the sweep sound pass.
Title: MathAudio Room EQ for Foobar2000
Post by: giro1991 on 2014-07-04 10:51:27
easy, thanks!
Title: MathAudio Room EQ for Foobar2000
Post by: vtaylor on 2014-07-08 07:58:05
Salut k2k

Thanks for working and sharing.

I have a similar requirement to giro1991 - I use a DSP crossover plugin in Foobar so the measurement would need to proceed this, of course. There are no crossover components in my speakers and the crossover plugin is not VST.

Can you think of a solution, please ?

Thanks and regards

Vernon
Title: MathAudio Room EQ for Foobar2000
Post by: giro1991 on 2014-07-08 14:26:30
vtaylor,
I think adding "DSP Direct" option in the output dropdown list is a good idea, this would help you...
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2014-07-09 00:49:15
Salut k2k

Thanks for working and sharing.

I have a similar requirement to giro1991 - I use a DSP crossover plugin in Foobar so the measurement would need to proceed this, of course. There are no crossover components in my speakers and the crossover plugin is not VST.

Can you think of a solution, please ?

Thanks and regards

Vernon

There is no easy solution to this problem. Foobar2000 components cannot activate each other...
Title: MathAudio Room EQ for Foobar2000
Post by: kode54 on 2014-07-16 07:10:39
Would it be possible to port this to OS X, or at least export the current settings as a stereo impulse WAV file? While I realize that may allow people to dodge your licensing controls, my only reason for needing this is so I can attempt to use it as a system wide correction in AU Lab on OS X.

Also, just FYI, attempting to load this plug-in's configuration when running foobar2000 under Wine causes the whole program to crash. I could give you a crash report and minidump if you think you can make use of them, if it even matters.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2014-07-18 14:38:19
Would it be possible to port this to OS X, or at least export the current settings as a stereo impulse WAV file? While I realize that may allow people to dodge your licensing controls, my only reason for needing this is so I can attempt to use it as a system wide correction in AU Lab on OS X.

Also, just FYI, attempting to load this plug-in's configuration when running foobar2000 under Wine causes the whole program to crash. I could give you a crash report and minidump if you think you can make use of them, if it even matters.


The VST version of Room EQ is already ported to OS X, however, AFAIK AU Lab doesn't support VST plug-ins. It supports only AU plug-ins. It is possible that Room EQ will be ported to the AU format in the future, but I don't promise.

Room EQ applies a FIR-free technology which doesn't add the convolution-specific artifacts to the sound. This is one of the main advantages of this product. It is theoretically possible to export a time-limited piece of the impulse response as a WAV file for using it with external convolvers. However, convolvers add specific artifacts to the sound, so you will not get the same quality of the sound. The convolver-specific distortion is usually not large, however, it is better to avoid using convolvers in room correction systems.

Room EQ doesn't work with current version of Wine.
Title: MathAudio Room EQ for Foobar2000
Post by: uebu63 on 2014-12-12 10:41:19
Hi! Thank you for this plugin. Аre you going to add mode processing DSD?
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2014-12-12 19:06:01
Hi! Thank you for this plugin. ?re you going to add mode processing DSD?

No. DSD needs to be converted to PCM in order to run through a DSP engine.
Title: MathAudio Room EQ for Foobar2000
Post by: mfast on 2014-12-21 23:08:09
Interesting, what about a VST multichannels version?

Thx
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2014-12-22 08:29:17
Interesting, what about a VST multichannels version?

You can use multiple instances of Room EQ VST in your DAW.
Title: MathAudio Room EQ for Foobar2000
Post by: mfast on 2014-12-22 11:02:03
Interesting, what about a VST multichannels version?

You can use multiple instances of Room EQ VST in your DAW.


Thanks for your answer, this sounds good.

However for to measure the center channel ( in a 5.1 or 7.1 speaker configuration ), it's mandatary consider it like a mono channel: Is possible to do correctly this?

Regards
                     
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2014-12-22 22:04:22
Thanks for your answer, this sounds good.

However for to measure the center channel ( in a 5.1 or 7.1 speaker configuration ), it's mandatary consider it like a mono channel: Is possible to do correctly this?

Room EQ VST can work as a mono plug-in if you include it into a mono track of your DAW.
Title: MathAudio Room EQ for Foobar2000
Post by: mfast on 2014-12-23 21:51:50
Room EQ VST can work as a mono plug-in if you include it into a mono track of your DAW.


Ok, I will try it, thanks.

Title: MathAudio Room EQ for Foobar2000
Post by: Sleiven on 2015-01-04 10:05:10
I installed MathAudio Ro+om EQ for Foobar2000, but cannot get any sound when Room EQ is loaded in by File -Preferences-select RoomEQ+ Configure. As soon as RoomEQ is moved from  left to right column under Preferences I get sound. I have Windows 8, and realtek Soundard in my Lenovo Flex 15D PC
Can any one help please?
Best regards
Sleiven
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2015-01-04 19:58:26
I installed MathAudio Ro+om EQ for Foobar2000, but cannot get any sound when Room EQ is loaded in by File -Preferences-select RoomEQ+ Configure. As soon as RoomEQ is moved from  left to right column under Preferences I get sound. I have Windows 8, and realtek Soundard in my Lenovo Flex 15D PC
Can any one help please?
Best regards
Sleiven

The sound is absent because you didn't measure the frequency response of your room.
You need to measure the frequency response in accordance with the instruction: mathaudio.com/room-eq.htm (http://mathaudio.com/room-eq.htm)
After that click the "Room EQ" radio button and move down the vertical slider to cut out the resonances of your room.
Title: MathAudio Room EQ for Foobar2000
Post by: Rikardo on 2015-03-03 02:10:41
I installed MathAudio Ro+om EQ for Foobar2000, but cannot get any sound when Room EQ is loaded in by File -Preferences-select RoomEQ+ Configure. As soon as RoomEQ is moved from  left to right column under Preferences I get sound. I have Windows 8, and realtek Soundard in my Lenovo Flex 15D PC
Can any one help please?
Best regards
Sleiven

The sound is absent because you didn't measure the frequency response of your room.
You need to measure the frequency response in accordance with the instruction: mathaudio.com/room-eq.htm (http://mathaudio.com/room-eq.htm)
After that click the "Room EQ" radio button and move down the vertical slider to cut out the resonances of your room.


Hi,
I need help and have a question about calibrated microphone I have. It came with my Velodyne DD-10 subwoofer, looks almost the same as one pictured in manual and it is calibrated but I don't know how to use it correctly with MathAudio Room EQ for Foobar2000 because I don't have calibration file and don't know what it is.
On line manual says:
"Conventional measurement microphones work perfectly with MathAudio Room EQ without calibration. However, if you have a calibrated measurement microphone, you can use it too. Just rename its calibration file to calibration.frd or calibration.cal and copy it to the Documents -> MathAudio Room EQ folder. Then exit your Foobar2000 and start it once again."
Can you explain what is calibration file and how to obtain or make it? Should it come with all calibrated microphones...? My microphone kit didn't come with any CD and Velodyne doesn't offer calibration file. Please help me.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2015-03-03 11:22:41
Can you explain what is calibration file and how to obtain or make it? Should it come with all calibrated microphones...? My microphone kit didn't come with any CD and Velodyne doesn't offer calibration file. Please help me.


Measurement microphones usually have a very flat frequency response (in comparison with conventional microphones). Nevertheless, their frequency response is not ideally flat. That is why manufacturers often measure the frequency response of every measurement microphone and record the measurement results to individual calibration files. If you use the calibration file, the results of your room measurement are as accurate as if you would use an ideal measurement microphone. If your measurement microphone is supplied without a calibration file, you can send it to Cross-Spectrum Acoustics (http://www.csacoustics.com/products/) and they will make an individual calibration file for your microphone.
Title: MathAudio Room EQ for Foobar2000
Post by: bluesman841 on 2015-03-08 14:51:43
Idea: Android  support would be nice, just load the correction file and listen to the music.
Title: MathAudio Room EQ for Foobar2000
Post by: fretless on 2015-03-12 03:02:45
First, thanks for your work on this component.  Simple to use and it has made a great improvement in what I'm hearing from my little PC sound system.

Two things:

I didn't find any release notes or change log on your website.  I've updated three times now, would be interested to know what gets fixed or changed with the new versions.

Also, I'm wondering if there is a simple way you could suggest to make a "before and after" measurement to more objectively evaluate the effectiveness of the filtering.  The results sound good to me, I'm curious what the measured response actually looks like on a graph.

Thanks again for one of the very few add-on components that actually makes Foobar sound better.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2015-03-13 08:04:51
First, thanks for your work on this component.  Simple to use and it has made a great improvement in what I'm hearing from my little PC sound system.

Two things:

I didn't find any release notes or change log on your website.  I've updated three times now, would be interested to know what gets fixed or changed with the new versions.

Also, I'm wondering if there is a simple way you could suggest to make a "before and after" measurement to more objectively evaluate the effectiveness of the filtering.  The results sound good to me, I'm curious what the measured response actually looks like on a graph.

Thanks again for one of the very few add-on components that actually makes Foobar sound better.

All the latest updates can be qualified as “minor polishing”. No features added. For example, VST v2.4.8 includes a more convenient installer.

There is a simple method to evaluate the accuracy. You can connect the input of your sound card with its output by means of a RC circuit with cut-off frequency of about 1..2 kHz.  Then you can measure the frequency response of the RC circuit using Room EQ and compare it with the calculated frequency response. You can take the necessary formulas from  http://en.wikipedia.org/wiki/RC_circuit (http://en.wikipedia.org/wiki/RC_circuit)
The measured frequency response must coincide with the calculated frequency response. After that you can correct the frequency response using Room EQ and check the linearity of the resultant frequency response using sinusoidal signals of different frequencies.

There are a few other parameters that can be verified. Two of them have crucial importance: absence of pre-echo and absence of resampling. It is relatively easy to automatically equalize a room, but it is much more difficult to do it without pre-echo and resampling. The corrected sound becomes unnatural if it includes even a small amount of pre-echo. The absence of pre-echo in MathAudio Room EQ can be easily checked using any DAW and wave editor. The absence of resampling can be checked by means of FFT analysis.
Title: MathAudio Room EQ for Foobar2000
Post by: fcouma on 2015-03-29 11:00:04
Hello

I'm a MAthaudio french user

It does really great job

I take the measures with my Anthem MRX microphone (with calibration file)

Is this a suitable microphone ?

thanks
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2015-03-29 14:11:14
Hello

I'm a MAthaudio french user

It does really great job

I take the measures with my Anthem MRX microphone (with calibration file)

Is this a suitable microphone ?

thanks

The Anthem MRX microphone is a conventional measurement microphone, so it must work with Room EQ.
Title: MathAudio Room EQ for Foobar2000
Post by: fcouma on 2015-03-29 15:40:55
Hello

I'm a MAthaudio french user

It does really great job

I take the measures with my Anthem MRX microphone (with calibration file)

Is this a suitable microphone ?

thanks

The Anthem MRX microphone is a conventional measurement microphone, so it must work with Room EQ.


Yes, it works perfectly but my question was about the microphone Anthem's quality compared to UMIK (for example)

The Mathaudio curves are really closed to Anthem ARC curves
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2015-03-30 12:05:26
Yes, it works perfectly but my question was about the microphone Anthem's quality compared to UMIK (for example)

The Mathaudio curves are really closed to Anthem ARC curves

I don't have a personal experience with the Anthem MRX microphones, but I think that the presence of the individual calibration file is a good sign. IMHO, there should be no much difference between UMIK-1 and your microphone.
Title: MathAudio Room EQ for Foobar2000
Post by: fcouma on 2015-03-30 12:26:47
Yes, it works perfectly but my question was about the microphone Anthem's quality compared to UMIK (for example)

The Mathaudio curves are really closed to Anthem ARC curves

I don't have a personal experience with the Anthem MRX microphones, but I think that the presence of the individual calibration file is a good sign. IMHO, there should be no much difference between UMIK-1 and your microphone.


Thanks !

Curves with Mathaudio 2.8 and :

DAC Matrix i-mini  (coax)
Vincent SP331
Infinity Kappa 8.2i


(http://img11.hostingpics.net/pics/754404Sanstitre1.png)
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2015-06-14 08:55:35
News
A new version of the plug-in has just been released. The new version includes a point-to-point drawing feature. Simply use the right button of your mouse to draw straight lines.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2015-09-02 14:59:25
News
New version released (v2.5.2).
The new version is compatible with Windows 10. It also includes the latest version of Foobar2000 SDK.

Title: MathAudio Room EQ for Foobar2000
Post by: fcouma on 2015-09-02 17:22:44
Thanks

The 2.5.1 version works fine with windows 10
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2015-09-02 18:36:40
Thanks

The 2.5.1 version works fine with windows 10

The 2.5.1 version doesn't normally show the "In/Out" window when you click the "In/Out" button (only on Windows 10). This problem is solved in the 2.5.2 version.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2015-10-19 09:21:21
News
New version released (v2.5.3).
The sampling frequency range is extended up to 384 kHz.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2015-11-17 07:44:37
News
New version released (v2.5.4).
The new version can read calibration files of iSEMcon measurement microphones (http://www.isemcon.net/en/emx-7150.htm) (they use decimal comma instead of decimal point).
Title: MathAudio Room EQ for Foobar2000
Post by: DiasDePlaya on 2015-11-22 00:01:20
News
New version released (v2.5.4).
The new version can read calibration files of iSEMcon measurement microphones (http://www.isemcon.net/en/emx-7150.htm) (they use decimal comma instead of decimal point).


Hi!

I tried to install the new version today but the installer blocked my computer. Win10.
Title: MathAudio Room EQ for Foobar2000
Post by: DiasDePlaya on 2015-11-22 01:49:58
News
New version released (v2.5.4).
The new version can read calibration files of iSEMcon measurement microphones (http://www.isemcon.net/en/emx-7150.htm) (they use decimal comma instead of decimal point).


Hi!

I tried to install the new version today but the installer blocked my computer. Win10.


After two restart now all working. I don't know what happens.
Title: MathAudio Room EQ for Foobar2000
Post by: k2k on 2015-11-22 07:46:02
After two restart now all working. I don't know what happens.

I've just tested the installer with both x32 and x64 versions of Windows 10. Everything works normally. This new version of the Room EQ plug-in uses exactly the same installer as it was used in the previous version. You may want to scan your computer with Avira Free Antivirus (https://www.avira.com/en/avira-free-antivirus) for safety.
Title: MathAudio Room EQ for Foobar2000
Post by: DiasDePlaya on 2015-11-22 17:16:04
After two restart now all working. I don't know what happens.

I've just tested the installer with both x32 and x64 versions of Windows 10. Everything works normally. This new version of the Room EQ plug-in uses exactly the same installer as it was used in the previous version. You may want to scan your computer with Avira Free Antivirus (https://www.avira.com/en/avira-free-antivirus) for safety.


I did everything, no viruses, no registry problems, all OK now. But I needed two restarts to recover my PC.
Title: MathAudio Room EQ for Foobar2000
Post by: Bonaducci on 2015-12-13 19:38:21
Great plugin! My home setup is not high end and the biggest problem is that on some frequencies you can hear resonance from one low frequency which is quite hard to locate and adjust using most of common equalizers.

Two tips from my side.

Go to Preferences->Playback->Output->Buffer length and change it to quite low. I used 6s for normal playback but because of that any change in MathAudio needed to pass 6s buffer to apply. Note that reducing it to low value will also change Fading fields because they need buffer to be applied.

Second tip is that I heard no difference until I've moved conversion to surround after MathAudio. Otherwise MathAudio was applying only to stereo I guess.
Title: MathAudio Room EQ for Foobar2000
Post by: DiasDePlaya on 2015-12-26 19:06:37
I just installed from fresh the FooBar2000 and the MathAudio (I had very old versions) and did a new calibration, and the result was way better than before! Thanks for the new version!!!
Title: MathAudio Room EQ for Foobar2000
Post by: NEMO7538 on 2015-12-30 09:22:02
Wonderfull plugin !
I spent most of the night playing with it and it definitely brings significant sound improvement to my hifi setup. Congratulations.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2016-01-17 06:29:34
News
New version released (v2.5.6).
EXE installer is replaced with a ZIP file.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2016-02-03 09:14:15
News
New version released (v2.5.7).
Minor algorithm improvements.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: newson on 2016-02-13 05:22:16
Hello I'm from Brazil an excellent system pity that I can not use because my dac IFI only works of foobar using the super audio CD decoder plugin. Any new version will enable it?
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2016-02-13 08:36:07
Hello I'm from Brazil an excellent system pity that I can not use because my dac IFI only works of foobar using the super audio CD decoder plugin. Any new version will enable it?
It looks like your IFI dac supports PCM: http://ifi-audio.com/portfolio-view/nano-idsd/
I don't have any personal experience with that dac, however, if it really supports PCM, it should work with Foobar2000 without the decoder plug-in. It is possible that you need to select the correct output device in the Foobar2000 settings.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: ustas on 2016-03-26 09:46:09
Please update binary on official site, http://mathaudio.com/foo_room_eq.zip old ver 2.5.5. Where can I get ver, 2.5.7?
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2016-03-26 10:44:55
Please update binary on official site, http://mathaudio.com/foo_room_eq.zip old ver 2.5.5. Where can I get ver, 2.5.7?
I've just checked the binary. Its version is correct (2.5.7). Simply remove v.2.5.5 in your Control Panel, then install v.2.5.7 in accordance with the instruction which can be found in the ZIP file.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: ustas on 2016-04-02 17:35:48
Please update binary on official site, http://mathaudio.com/foo_room_eq.zip old ver 2.5.5. Where can I get ver, 2.5.7?
Found two instance of file in two folders "components" and user-components"... :) Thank you.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: robertzombie on 2016-05-24 18:57:13
Very interesting software! I have just experimented with this in Foobar. It has certainly cleared up the low end in my room and brought the mids and highs into greater focus. I'm not sure if I "prefer" the sound yet, it will take a while to get used to. Is it possible to re-run the test with the corrections activated to see a new set of results with the MathAudio amendments in place?
Title: Re: MathAudio Room EQ for Foobar2000
Post by: pramed on 2016-05-30 15:38:56
Maybe someone can clarify this.

In the MathAudio guide for the Foobar room EQ plugin, it only mentions interfacing the speakers and microphone
via a computer soundcard. I haven't got one of them.

My system is: Computer - USB DAC/Preamplfier - Amplifier - Speakers. If I had one of the recomended USB microphones
is that enough for this to work or would I still need a soundcard to act as an interface for some reason?

If I am good to go with my present system does anyone else use a similar setup - got any advice/tips? 

Thanks
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2016-06-17 05:58:37
Very interesting software! I have just experimented with this in Foobar. It has certainly cleared up the low end in my room and brought the mids and highs into greater focus. I'm not sure if I "prefer" the sound yet, it will take a while to get used to. Is it possible to re-run the test with the corrections activated to see a new set of results with the MathAudio amendments in place?
The component doesn't include such a feature: the measurement subsystem is implemented as an independent block which doesn't include the correction algorithm. The component corrects the 'average' response of the room which is calculated as a result of the multipoint measurement.  You may safely trust the averaged response plots (taking into consideration that they are smoothed for better readability).
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2016-06-17 06:06:09
My system is: Computer - USB DAC/Preamplfier - Amplifier - Speakers. If I had one of the recomended USB microphones
is that enough for this to work or would I still need a soundcard to act as an interface for some reason?
You may connect your USB microphone directly to your PC. After that click the "In/Out" button in the Room EQ component window and select the USB input (this input will be visible after connecting the microphone to your PC).
Title: Re: MathAudio Room EQ for Foobar2000
Post by: StabMe on 2016-06-29 13:28:32
Hey!

Really nice plug-in. I have a little experience in DRC programs and this seems like a very good and cheap(est) alternative to high cost analogues.

I have two questions:

- After applying correction, the overall volume level significantly dropped. Is there a way to add some gain lost due to correction? And foobar plugin you would recommend to compensate for the lost volume?

- Although, a very nice addition to a home-audio system, do you think this plug-in will work as nicely in the car environment? I am currently contemplating a CarPC install with PC being the central DSP and am choosing a DRC solution.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2016-06-29 19:59:10
Hey!

Really nice plug-in. I have a little experience in DRC programs and this seems like a very good and cheap(est) alternative to high cost analogues.

I have two questions:

- After applying correction, the overall volume level significantly dropped. Is there a way to add some gain lost due to correction? And foobar plugin you would recommend to compensate for the lost volume?

- Although, a very nice addition to a home-audio system, do you think this plug-in will work as nicely in the car environment? I am currently contemplating a CarPC install with PC being the central DSP and am choosing a DRC solution.
- This plug-in doesn't change the maximum amplitude of the audio signal. Adding some gain can cause clipping in your DAC. It is recommended to use the volume control of your audio amplifier to compensate for the lost average volume.
- Yes, this plug-in will work in the car environment. Use no less than 10 measurement points.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: HAL2010 on 2016-07-02 13:01:32
Using this on my PC with Foobar2000 and a Dayton Audio UMM-6 calibrated mic did a very nice job of correcting the two channel system in room response at my listening position.

Thanks for the great capability!
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2016-07-14 21:52:07
News
New version released ( v2.5.8 ).
The new version supports microphone calibration files with the .txt file extension.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: ironmine on 2016-10-04 01:50:27
This software needs the volume adjustment feature as the Math Audio processing results in digital clipping.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2016-10-06 16:02:33
News
New version released ( v2.5.9 ).
The new version includes an additional gain control slider.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2016-10-12 12:25:48
This software needs the volume adjustment feature as the Math Audio processing results in digital clipping.
Room EQ doesn't clip the sound, however, its output signal can exceed 0 dB. Old versions of Room EQ relied on the host's volume control to avoid clipping. The latest version includes an amplitude indicator which helps to set the "Room EQ gain" control to the position corresponding to 0 dB output (see Fig.8 at http://mathaudio.com/room-eq.htm (http://mathaudio.com/room-eq.htm) ).
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2016-10-12 12:29:39
News
New version released ( v2.6.0 ).
The new version includes an additional amplitude indicator.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: SmartOne on 2017-02-07 23:48:42
The sound is absent because you didn't measure the frequency response of your room.
You need to measure the frequency response in accordance with the instruction: mathaudio.com/room-eq.htm (http://mathaudio.com/room-eq.htm)
After that click the "Room EQ" radio button and move down the vertical slider to cut out the resonances of your room.

So I can't use this as a simple click-and-drag parametric equalizer?
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2017-02-09 12:46:19
So I can't use this as a simple click-and-drag parametric equalizer?
You are right.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: SmartOne on 2017-02-09 19:56:50
I'm requesting a button to simulate a perfectly flat frequency response white line so I can notch it as I see fit.  What say you?
Title: Re: MathAudio Room EQ for Foobar2000
Post by: kode54 on 2017-02-09 21:15:32
Then I'd say what you're requesting is not a room correction filter, as room correction is not something you can do by merely tweaking parameters until it sounds good.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: SmartOne on 2017-02-10 00:14:32
This component already has the hard part down.  The only thing missing is to add a simple button that provides a perfect response to play with.

Here comes the semantics: "room correction" is arbitrary and ambiguous in the first place.  My hand-made correct curve is not objectively any worse than something spit out and adjusted from a "good" microphone at a "reasonable" listening position.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Jailhouse on 2017-02-10 01:40:58
foobar has a built-in equalizer if you want to do it yourself.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: SmartOne on 2017-02-10 02:13:03
a simple click-and-drag parametric equalizer
Title: Re: MathAudio Room EQ for Foobar2000
Post by: kode54 on 2017-02-10 03:03:46
The closest you'll get is foo_dsp_xgeq, which is already a better equalizer than the one that comes with the player, simply by virtue of the available open source solution, SuperEQ, being a piece of crap if you don't work around its shortcomings manually. I say manually, because for most/all frequency bands, it has a sheer dropoff on both sides, and the only way to have a smooth slope of frequency response between wide points is to manually configure SuperEQ with more ranges and interpolate the response levels.

xgeq is already capable of fine grained and also smooth response slopes, if that's what you're after. Maybe you can ask xnor to make a parametric equalizer that plots a logarithmic frequency line, and lets you redraw the line almost like a paint program. It won't be an automated room correction filter like this plug-in, but it will be what you want.

Basically, this plug-in is probably never going to be a parametric equalizer, because that's not what it was designed to be. It plays reference sounds, it collects the impulse response using a reference microphone, and it performs deconvolution to produce an impulse simulating the conditions of your room. Then it calculates an inverse to that impulse response, assuming that to compensate for relative frequency losses caused by your speakers or room, it needs to pump up the frequency ranges inverse to the effects of that filter.

Maybe it could be a parametric equalizer, but it doesn't even need to know the numeric frequencies that it's correcting. It merely needs to take a frequency domain plot of your room/speakers' impulse response, normalize it, then inverse the values of each band, so accentuated frequencies are attenuated, and attenuated frequencies are accentuated.

If I were feeling adventurous, I could try to make an overlapped FIR-based parametric equalizer, using the same FFT library as foobar's visualization system, KissFFT. But I have no idea how the different bands of a frequency domain conversion relate to the base or the nyquist frequencies, or what their relative frequency steps would be. I would have to play with it a bit and measure the results.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: SmartOne on 2017-02-11 06:34:01
I understand how this component is intended to be used.  The thing is, it already has clicky-draggy support, so it seems like it would be easy to make it generate a perfectly flat response for manual frequency twiddling because manual frequency twiddling is already supported.  I appreciate that only attenuation is allowed, because that protects the natural excursion of the audio components, as the author describes.

I hope my attached mockup makes what I want crystal clear.

I tried hacking foobar2000's "Core.cfg" to insert 0 values for each frequency band, but I don't know how to recalculate the file's checksum (assuming my hacking was correct), so no-go.

Title: Re: MathAudio Room EQ for Foobar2000
Post by: Fairy on 2017-05-04 08:34:52
I'd love playing with this. My current setup sounds fine to my ears, but I would like to see what this program thinks of it and if correction can even make things sound better.

I was always about playing absolutely bitperfect and without any EQ, but maybe this changes my mind...

I have a mic connector on my mainboard, play music via a USB connection and I have 2 denon calibration mics that came with my previous receiver.

Off course this is not a real calibrated measurement microphone, but could it be somewhat useful for this task?
I'd like to know if I can get this to work, before buying a dedicated calibrated microphone.

Are there any clues how "off" this method can be? Apart from the microphone I use the onboard soundcard's microphone input. Does that make a huge difference or is the mic by far the most determining factor?

Thanks in advance!
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Fairy on 2017-05-04 18:17:19
Well I tested with my denon mic. Turns out that after EQ'ing everything sounds flat, no life in it. Low notes sound like they are EQ'ed out, not pleasurable to listen to, very "cold" sound.

Maybe I'm doing something wrong. In the examples you see the lows in the graph fade out to the  unhearable range. In my measurements they are quite high even in de 20hz range.

When I turn the slider up to the point the lows are unaffected (quite high) it restores, but it also gets back more to the original tone of the setup, so I think I am eliminating a part of the calibration I just done.
Also i put the mic on a one-foot tripod at ear height and put the children to bed (that helps a lot!)

Is there someone with a little more experience that can help me out?

At this moment I am already getting more pleasant result by playing with the settings, but it's quite difficult. Maybe there are some tips or do & don'ts to consider :)
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Fairy on 2017-05-04 20:30:59
I'm getting the hang of it....

This plugin is fantastic  :o  :o  :))  :))

I thought I had tuned my set quite good. After turning off the plugin, everything seems more boomy. Also the highs are much more dampened.
Love this thing. Soon I'm getting myself a good measurement microphone. Only need to find out now how to import the calibration file in this tool... I have no idea yet.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: GeSomeone on 2017-06-02 16:01:15
Interesting, what about a VST multichannels version?
You can use multiple instances of Room EQ VST in your DAW.
That is obviously not the case in foobar2000, which is OK by me. I just have a question about it.
I just started using the Room EQ plugin in foobar2000 in combination with a 5.1 channel setup. No problem, I'd like to know if Room EQ in this situation only affects the front L+R channels?
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Fairy on 2017-10-10 15:17:20
I'm getting the hang of it....

This plugin is fantastic  :o  :o  :))  :))

I thought I had tuned my set quite good. After turning off the plugin, everything seems more boomy. Also the highs are much more dampened.
Love this thing. Soon I'm getting myself a good measurement microphone. Only need to find out now how to import the calibration file in this tool... I have no idea yet.

A little update. I did use a calibrated mic short after my post, but found that the sound after calibration was still not quite how I like it after listening more thoroughly to it. The boomyness was fixed by putting the outer rings of the bongs into my CM10 s2 speakers. It fixed that perfectly.

After trying with and without calibration it somehow not quite satisfies me. Maybe I like the signature of the B&W speakers the way they are, but then again calibrated should be de point to start. Tried many different settings but still I miss something. The low end is a bit too suppressed. Maybe this comes from a slight hum from my aquarium pumps (50hz). I don't know if they influence the measurement? It's barely noticable, but to a microphone maybe more??

Are there any suggestions or alternatives to this to fool around with?
Title: Re: MathAudio Room EQ for Foobar2000
Post by: GeSomeone on 2018-01-06 22:06:19
Meh, another update without changelog.  ::)
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Anakunda on 2018-03-09 22:01:07
Hiyas, can I measure a purposeful profile using builtin laptop mic or do I need an external studio microphone?
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2018-06-10 20:26:19
Hiyas, can I measure a purposeful profile using builtin laptop mic or do I need an external studio microphone?
The built-in laptop mic has a non-linear frequency response and its directional pattern is not suitable for this application. You need a conventional measurement microphone. They are not expensive. Look at this model: https://www.parts-express.com/dayton-audio-umm-6-usb-measurement-microphone--390-808
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Lucidae on 2018-08-12 03:23:24
Thanks k2k for this wonderful piece of software, very user friendly. I recently bought a UMIK-1 for setting up the foobar DSP.

As someone who is new to room correction, I have a few questions;
What volume in decibels (approx.) should my speakers output while running the measurement?
How many measurements should I run if I have only a single static listening position?
Does mic placement make a big difference in terms of height and angle?
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Porcus on 2018-08-12 11:05:42
What volume in decibels (approx.) should my speakers output while running the measurement?
[...]
Does mic placement make a big difference in terms of height and angle?
Is there any reason not to start with your listening volume and the listening position? 

(If height makes a difference in terms of sound, then mic placement will placement will make a difference too, of course.)
Title: Re: MathAudio Room EQ for Foobar2000
Post by: patate91 on 2018-08-12 12:53:40
Thanks k2k for this wonderful piece of software, very user friendly. I recently bought a UMIK-1 for setting up the foobar DSP.

As someone who is new to room correction, I have a few questions;
What volume in decibels (approx.) should my speakers output while running the measurement?
How many measurements should I run if I have only a single static listening position?
Does mic placement make a big difference in terms of height and angle?

REW suggest 75db + (take care for clipping if going up).

Moving the mic 1" will change your measurements. There's no consensus about mic placement up or forward, so do what suits you.

I take one or two measurements before changing something in my room. There's chances of having weird measurements or noise during a sweep.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: krabapple on 2018-08-20 22:34:27
Does the software offer the option to correct only below the Schroeder frequency of the room, as per the recommendations of Toole and some others who assert that 'correcting' above that may be detrimental.  Below Schroeder, room modal effects dominate; above it, reverberant effects dominate.   For 'typical' rooms it's circa 300Hz. 

Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2018-08-21 09:47:11
Does the software offer the option to correct only below the Schroeder frequency of the room, as per the recommendations of Toole and some others who assert that 'correcting' above that may be detrimental.  Below Schroeder, room modal effects dominate; above it, reverberant effects dominate.   For 'typical' rooms it's circa 300Hz.
If you don't wish to correct the frequency response above 300 Hz, use the manual correction of the curve. Use the left mouse button to draw arbitrary curves, or use the right mouse button to draw straight lines. The statement about the influence of the reverberation effect is correct, however, Room EQ applies an advanced multipoint measurement algorithm that takes this effect into consideration. You may want to compare the different types of correction with your own ears (use the "Save preset" and "Load preset" buttons to conveniently switch the plots).
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2018-12-04 16:58:54
News
New version released ( v2.6.9 ).
Minor improvements in DSP algorithms.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-01-02 15:33:05
News
New version released ( v2.7.0 ).
The new version includes a new "High resolution" feature.
The "Stereo balance" switch is replaced by a slider.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-04-26 11:19:04
NO TEST SIGNAL OUTPUT

Hello, I am trying to use Room EQ with Foobar 1.4.3 and ASIO interfaces, however I cannot have the test signal out.

My Foobar DSP set-up requires 96kHz sampling rate and an active X-over plug-in (Thuneau Allocator) because I am using multi-amps.
So, MathAudio Room EQ is followed by Thunea Allocator that takes stereo input and gives 6 channels output.

I have been able to configure Room EQ for getting mic signal from ASIO analog input, however the default output stream and also the default digital output look not sending the audio to the next DSP element in the chain and no signal output at all.

To check the problem, I did the same using the VST version of Room EQ. In this can, I can get the test signal output, but I cannot configure the mic input.

Anyone can help me?

Many thanks and kind regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-04-26 13:04:40
Hello, I am trying to use Room EQ with Foobar 1.4.3 and ASIO interfaces, however I cannot have the test signal out.
Hello Andrea,

The Foobar2000 version of Room EQ allows you to measure your room. You don't need VST for measurement.
1. Select the "Room Measurement" radio button to activate the Room Measurement mode.
2. Select the correct mic input (left or right) by means of the "Mic input" radio buttons.
3. Click the "In/Out" button and select your input device.
4. Look at the "Mic signal indicator" and speak to the microphone. If everything is done correctly, the indicator will show you the presence of the mic signal. After that you can click the "Start measurement" button to measure your room.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-04-26 14:29:26
Hello, I am trying to use Room EQ with Foobar 1.4.3 and ASIO interfaces, however I cannot have the test signal out.
Hello Andrea,

The Foobar2000 version of Room EQ allows you to measure your room. You don't need VST for measurement.
1. Select the "Room Measurement" radio button to activate the Room Measurement mode.
2. Select the correct mic input (left or right) by means of the "Mic input" radio buttons.
3. Click the "In/Out" button and select your input device.
4. Look at the "Mic signal indicator" and speak to the microphone. If everything is done correctly, the indicator will show you the presence of the mic signal. After that you can click the "Start measurement" button to measure your room.

Hello K2K, the mic is there as I clearly stated in my post. The mic is detected and well working.
Is Room EQ that looks not generating any test signal.

Pressing the Foobar In/Out button there is also the option to select the OUTPUT.
I first used the default, then I tried also the other reasonable good outputs, but NO SIGNAL OUT.

It is clear that with my configuration, Room EQ does not send its signal to the next DSP component in the audio chain.

Regards
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-04-26 18:13:16
Herein attached more details about my case
Thanks and regards
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-04-26 21:56:18
Herein attached more details about my case
Room EQ sends the test signal directly to the selected output device. In your case it sends the sweep sound to "Dispositivo uscita digitale". Is it the correct output device? Room EQ can be chained with other foobar2000 components for playback only. If you wish to process the test sound by any DSP plug-ins, you cannot do it in Foobar2000, but you can do it in any DAW. For example, you can use demo versions of Reaper and Room EQ VST to process the sweep sound by another plug-in and measure your room. You can download Reaper from https://www.reaper.fm  You can also find some instructions for setting Reaper up at https://mathaudio.com/room-eq-faq.htm Save the results of your measurement as a SNR file. After that you can use it for playback in Foobar2000 together with any other Foobar2000 DSP components.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-04-29 09:40:13
Hello K2K, many thanks. I did as you instructed and I got it working.
Regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: audioclassic on 2019-04-29 11:03:09
Hello K2K, what a nice software. I use foobar2000 to stream music from a windows 10 tablet to a network player with 2 speakers and 2 subs. Can I use mathaudio roomcorrection for this setup, or does it only work with the soundcard of the tablet? The output menu in mathaudio doesn't show  the in foobar2000 connected network player. Can't find this use case here and want to ask this before I buy the measurement microphone.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-04-29 13:46:23
Hello K2K, what a nice software. I use foobar2000 to stream music from a windows 10 tablet to a network player with 2 speakers and 2 subs. Can I use mathaudio roomcorrection for this setup, or does it only work with the soundcard of the tablet? The output menu in mathaudio doesn't show  the in foobar2000 connected network player. Can't find this use case here and want to ask this before I buy the measurement microphone.
Hello audioclassic,

First of all it is necessary to check whether or not your tablet is powerful enough to work with Room EQ. You may contact us at https://mathaudio.com/contact.htm and I will send you a SNR file. You can run Room EQ with this file on your tablet.  If you can play music without any interruptions, your tablet can perform all necessary calculations in real time. Alternatively, you can make the SNR file yourself by means of the sound card of your tablet (the quality of the microphone has no meaning because you will not use this SNR file for room correction).

You also need to click the "In/Out" button on the Room EQ's panel and check whether you can see your network player in the list of output devices. If the player is present, click the "Room measurement" button and check whether you can hear the sweep sound. If you can hear the sound, your tablet can be used to measure your room. If you don't see your network player in the list of output devices, you can temporarily use another computer (laptop of desktop) to measure your room and make the SNR file. Then you can use that SNR file on your tablet to correct your room.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: audioclassic on 2019-04-29 16:02:38
Thanks for the answer K2K, I already tried to make a SNR file with the tablets microphone and speakers and that worked fine, so the tablet can handle it. But the network player, although connected to foobar2000 and working fine with music streaming doesn't show up in the output menu of mathaudio on the tablet, and not on my other big Wacom i7 tablet and not on my workstation laptop. So the conclusion will be that it can't be done this way, I think?
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-04-29 16:28:28
Thanks for the answer K2K, I already tried to make a SNR file with the tablets microphone and speakers and that worked fine, so the tablet can handle it. But the network player, although connected to foobar2000 and working fine with music streaming doesn't show up in the output menu of mathaudio on the tablet, and not on my other big Wacom i7 tablet and not on my workstation laptop. So the conclusion will be that it can't be done this way, I think?
Is it possible to temporarily use another audio or USB input of your network player to connect it to your laptop for measurement? If not, you can try to temporarily use demo versions of Reaper and Room EQ VST for measurement. It is possible that Reaper can "see" the audio interface of your network player. You can download Reaper from https://www.reaper.fm You can also find some instructions for setting Reaper up at https://mathaudio.com/room-eq-faq.htm
Title: Re: MathAudio Room EQ for Foobar2000
Post by: audioclassic on 2019-05-01 11:26:10
The network player has no other computer connection than  wifi or network cable. The usb is for music files only.  And Reaper doesn't show / see the network player either (although windows 10 does). So its not gonna work I ques.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-05-01 12:45:35
The network player has no other computer connection than  wifi or network cable. The usb is for music files only.  And Reaper doesn't show / see the network player either (although windows 10 does). So its not gonna work I ques.
It is strange that Foobar2000 can work with the driver of your network speakers but Reaper cannot do it. Open Reaper, go to Options -> Preferences -> Audio -> Device and click the "Audio system" drop list. It will show you the list of available audio drivers. Select the driver of your network speakers if it is available. If it is not available, I don't see any simple and reliable methods to overcome this problem...
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-05-01 13:15:16
Hello Audioclassic, if you are still having problems with Reaper, I suggest you to use the free CARLA DAW/VST host.
I am using it and it is excellent.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: audioclassic on 2019-05-15 16:57:15
Strange as it is, the driver can be seen in windows 10 and in foobar20000, but not in Mathaudio and not in Reaper. I quess the Carla Daw/Vst host is for Linux, I am just a stupid windows 10 user. A possibility for room equalization with dlna is difficult to find. I found somewhere that maybe in Jriver there is a possibility with plugins. I hate to leave foobar2000, but I will research this further.
Thanks for the responses.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-05-15 17:02:31
Hello Audioclassic, ... of course you should download the appropriate Carla for your platform.
However, if you are using Windows 7 or 10, I would now suggest to use Cantabile 3 free edition (registration required, but absolutely free).
I moved to it a couple of weeks ago and I found it better for this application (easier to use and lighter in terms of resources used).
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-05-15 17:56:35
Hello Audioclassic, ... of course you should download the appropriate Carla for your platform.
However, if you are using Windows 7 or 10, I would now suggest to use Cantabile 3 free edition (registration required, but absolutely free).
I moved to it a couple of weeks ago and I found it better for this application (easier to use and lighter in terms of resources used).
It looks like Cantabile doesn't work with DLNA too. Audioclassic uses network speakers and he needs DLNA.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: audioclassic on 2019-05-16 13:44:25
I found a workaround for using dlna and mathaudio. I read you can make a wav file of a measurement sweep in REW. Using  2 computers you can than measure in one with foobar and mathaudio and set a delay of 15 seconds. With the other computer you play the measurement sweep wav file in foobar exactly at the right time. I don't know how good a REW sweep measument file is for Mathaudio but it does work. Nevertheless its about time someone creates a room eq software that is ready for dlna😊. A lot of people will be using dlna at the moment. I have a Panasonic network player with 2 KEF speakers and under each speakers a REL subwoofer. I guess a lot of people now have a setup like this. Thanks for all the answers.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-05-16 15:38:44
I found a workaround for using dlna and mathaudio. I read you can make a wav file of a measurement sweep in REW. Using  2 computers you can than measure in one with foobar and mathaudio and set a delay of 15 seconds. With the other computer you play the measurement sweep wav file in foobar exactly at the right time. I don't know how good a REW sweep measument file is for Mathaudio but it does work. Nevertheless its about time someone creates a room eq software that is ready for dlna😊. A lot of people will be using dlna at the moment. I have a Panasonic network player with 2 KEF speakers and under each speakers a REL subwoofer. I guess a lot of people now have a setup like this. Thanks for all the answers.
There is a free program that streams audio from PC to DLNA: https://www.streamwhatyouhear.com/
Hopefully it could send the sweep sound from Room EQ to your network speakers. You may want to try it.
The WAV sound from REW produces a substantial measurement error if you use it with Room EQ.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: audioclassic on 2019-05-16 16:16:53
OK, the REW  WAV file did work but the result doesn't sound good indeed. I tried stream what you hear before, but this gives a delay that makes it unusable for mathaudio (and for youtube film)
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Porcus on 2019-09-13 10:21:39
If the developers read this: please keep the presets when upgrading the component. fb2k went completely silent until I could search through my files to find it.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-09-13 11:46:43
If the developers read this: please keep the presets when upgrading the component. fb2k went completely silent until I could search through my files to find it.
Foobar2000 automatically resets the preset when the size of the new preset is not equal to the size of the old preset. We recommend to save the old preset as a SNR file before upgrading the component. The SNR file helps you to manually restore your preset.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-09-19 17:45:12
News
New version released ( v2.7.2 ).
The new version allows one to redo the last measurement if an occasional noise has happened during the measurement.
Please don't forget to save your preset as a SNR file before upgrading the component.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: racerxnet on 2019-09-21 17:28:20
I am having problems with the software working on my computer. When Mathaudio is enabled in the DSP and opened, there is no response on the meter to show the microphone is picking up sound. The in/out button is not visible either. I can see that the Umik-1 is functioning in the recording properties of Windows 7. Clicking the button for a sweep does not function, no sound output from Mathaudio. If I am playing a song and click the sweep button it outputs the test signal but does not record. Output was changed with WASAPI, KS, ASIO, and direct Sound. 32bit DLL is loaded in Foobar. 

Is this not working because the Umik-1 is not recognized by MathAudio?

My chain is as follows; Computer - Berkeley Alpha USB - Tri-Vista 21 DAC - Pre Amp - Amplifiers - Speakers.

Software; Windows 7 Pro, Latest Foobar2k, MathAudio, Umik-1. Exclusive access checked in sound properties and tried unchecked.

All help appreciated!

Thanks Mark
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-09-21 18:35:26
I am having problems with the software working on my computer. When Mathaudio is enabled in the DSP and opened, there is no response on the meter to show the microphone is picking up sound. The in/out button is not visible either.
The "In/Out" button is absent in VST/AU versions of Room EQ. Make sure that you use the Foobar2000 version of Room EQ.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: racerxnet on 2019-09-21 19:06:49
I am having problems with the software working on my computer. When Mathaudio is enabled in the DSP and opened, there is no response on the meter to show the microphone is picking up sound. The in/out button is not visible either.
The "In/Out" button is absent in VST/AU versions of Room EQ. Make sure that you use the Foobar2000 version of Room EQ.

Thank You for the response. I found out exactly as you noted, I loaded the incorrect DLL file. I can now try out the software.

Mark
Title: Re: MathAudio Room EQ for Foobar2000
Post by: racerxnet on 2019-09-21 21:02:47
Is there a way to minimize the room EQ window while using the playlist from Foobar, or am I thinking wrong. Once I close MathAudio while playing a song it stops. I know Dirac Lives playback engine does not interfere with or stay on top of the playlist window. After I save a correction file and start Foobar, do I have to open MathAudio on top to enable the use of the file created?

Mark
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-09-21 22:25:21
Is there a way to minimize the room EQ window while using the playlist from Foobar, or am I thinking wrong. Once I close MathAudio while playing a song it stops. I know Dirac Lives playback engine does not interfere with or stay on top of the playlist window. After I save a correction file and start Foobar, do I have to open MathAudio on top to enable the use of the file created?
Click the "Apply" button in the DSP Manager.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: boxerfan88 on 2019-10-15 03:58:46
Hi,

A newbie question on MathAudio Room EQ/foobar.

The tutorial says "Place the microphone at your ear height. Set it vertically." which implies pointing to the ceiling...correct?
Therefore I should use the UMIK-1 microphone *_deg90 calibration file...

I just wanted to re-confirm my understanding...

Thanks!
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-10-15 12:04:25
The tutorial says "Place the microphone at your ear height. Set it vertically." which implies pointing to the ceiling...correct?
Therefore I should use the UMIK-1 microphone *_deg90 calibration file...
I just wanted to re-confirm my understanding...
Yes, you’re right.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: boxerfan88 on 2019-10-17 09:58:36
Hello,

Another noobie question:  If I am doing the EQ for one MLP (main listening position), should I just take 1 measurement sample, or do a multi-point measurement?

If I should do a multi-point measurement, should I cover the 50cm2, or 90cm2 (90cm2 is larger than the MLP seat)?
(https://i.ibb.co/7yk209B/MLP2.jpg)

**Mine is a HiFi Stereo setup.

Thanks for any pointer, and help understanding RoomEQ's difference between single measurement vs. multi-point measurement.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-10-17 17:25:24
Hello Boxerfan88,
personally I do measurements only at the Golden Spot (MLP).
I also tested the multi points, but with my room geometry doesn't work better.
So, if you want to clear this matter, you should test both and then take the better result.
Regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-10-17 18:14:05
Another noobie question:  If I am doing the EQ for one MLP (main listening position), should I just take 1 measurement sample, or do a multi-point measurement?
If I should do a multi-point measurement, should I cover the 50cm2, or 90cm2 (90cm2 is larger than the MLP seat)?
Thanks for any pointer, and help understanding RoomEQ's difference between single measurement vs. multi-point measurement.
A multi-point measurement is always better than a single-point measurement. Among other things, a single-point correction makes the sound more dependent on the location of your head.
The smaller the multi-point measurement area, the better the accuracy. The measurement area should be as small as possible, but it should cover all possible locations of your head. In other words, the size of the measurement area depends on your habits.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: boxerfan88 on 2019-10-18 02:33:45
Hello AndreaT, k2k, thank you both for your very valuable inputs. I tried various combinations and settled on the small multi-point measurement @ MLP, as it sounded the best to my ears.

The measurement that I settled on was taken along the edges of 60cm x 30cm square @ MLP, 6 multi-point measurements.

(https://i.ibb.co/Psp2tvq/measurement.png)
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-10-19 07:57:31
@boxerfan88 : The Golden Spot should always be in. That's why the basic matrix is 9x9 = Golden Spot plus 8 points surrounding it.

@K2K: Sorry, I do not agree in full with you. In my case I have a precise listening point, my head is always placed there. So, in my case, the optimal correction would probably be a very small MLP (15 x 15 cm square area total) that simply doesn't make sense to consider.
I confirm that in my case the MLP equalization considering 90 x 90 cm area gave worse result than the single point equalization at the Golden Spot.
Regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-10-19 12:52:51
Sorry, I do not agree in full with you. In my case I have a precise listening point, my head is always placed there. So, in my case, the optimal correction would probably be a very small MLP (15 x 15 cm square area total) that simply doesn't make sense to consider.
I confirm that in my case the MLP equalization considering 90 x 90 cm area gave worse result than the single point equalization at the Golden Spot.
Regards, Andrea
The length of the sound wave is equal to about 3 cm at frequency of 10 kHz. Consequently, if you move your measurement microphone a few centimeters far from its initial position, the superposition of the direct and reflected waves will be different (due to the difference of their phases), and the frequency response will be different too. The multipoint measurement minimizes this problem and helps to improve the accuracy of the measurement. If you are absolutely sure that you don't move your head, you may want to use a very small area for the multipoint measurement.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: qayws on 2019-10-20 14:50:53
HI,
I installed mathaudio room eq: it sends lost of cracks in the speakers! (this is in room eq mode, with a calibration properly done). I tried with a second PC, and it's the same. Its very upsetting, because removing the component in foobar doesn't stop it. I had to remove foobar completely and re-install!!
any idea why?
thanks
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-10-21 00:33:33
HI,
I installed mathaudio room eq: it sends lost of cracks in the speakers! (this is in room eq mode, with a calibration properly done). I tried with a second PC, and it's the same. Its very upsetting, because removing the component in foobar doesn't stop it. I had to remove foobar completely and re-install!!
any idea why?
thanks
Such cracks are theoretically possible on 'very' old computers if you use the "High resolution" mode in Room EQ. Try to use the "Normal resolution" mode instead. Try also to increase the buffer size in Foobar2000. If you remove Room EQ from Foobar's DSP panel, don't forget to click the "Apply" button to apply your changes. Room EQ cannot affect the performance of Foobar2000 if you removed the Room EQ component.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Papi Chulo on 2019-10-25 04:33:55
Hi K2K:

Can you please tell me, if the Room EQ software will only work through my laptop line audio and/or USB outputs?

I ask because I have a home-network based audio system. Far across the house is my file server. Over my in-home network, I share my music file folders to Foobar2000, which is running on a laptop in my listening room.  I use the BubbleUPnP plugin to turn a Chromecast Audio device into a UPnp/DLNA renderer. The digital output from the Chromecast Audio feeds a stand-alone DAC, which in turn feeds audio to my stereo amplifier.

The system works beautifully, is of very high audio quality (24/96), and I do not have to worry about having cables attached to my laptop.

I want to use the Room EQ software to improve my sound, but have read a few comments here that confuse me. Others are claiming that Room EQ + Foobar will NOT work over DLNA? Is this true for all situations? Or...is there a method you can please advise me to take in order to make Room EQ function together with my streaming setup?

Worst-case condition, I can get an active USB cable, take the Room EQ audio from my laptop USB port and run it 6 meters over to my DAC, eliminating the Chromecast Audio streaming part of my chain.

Any advice from you or others here on the forum is greatly appreciated! 

Thanks,
Papi Chulo
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-10-25 12:05:05
Can you please tell me, if the Room EQ software will only work through my laptop line audio and/or USB outputs?
I ask because I have a home-network based audio system.
The problem of network based systems lies in the fact that they substantially delay the sound. This fact creates a problem for the Room EQ's measurement subsystem. If your DAC has a USB input, try to temporarily use a USB cable to measure your room. After that you should be able to use your network system exactly as you did it before.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Papi Chulo on 2019-10-25 17:33:44

If your DAC has a USB input, try to temporarily use a USB cable to measure your room. After that you should be able to use your network system exactly as you did it before.
[/quote]

Thanks for the quick reply! Yes, I have a USB input on the DAC for measurement. This seems like a simple fix to my problem.

1) My measurement mic is a USB type. Will I be able to use it and the USB DAC simultaneously for measurement?

2) I guess I’ll need to install a driver for my USB DAC. Is there any particular one that you recommend? WASAPI, ASIO, etc?  I’m running Windows 10.

Thanks again!!!
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-10-25 19:17:21
1) My measurement mic is a USB type. Will I be able to use it and the USB DAC simultaneously for measurement?
2) I guess I’ll need to install a driver for my USB DAC. Is there any particular one that you recommend? WASAPI, ASIO, etc?  I’m running Windows 10.
Simply connect your USB microphone and your USB DAC to your PC. Then click the "In/Out" button on the Room EQ panel and select both these devices in the corresponding drop-lists. If your USB DAC is not present in the list of the available output devices, install a conventional Windows driver for your USB DAC (not ASIO).
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-10-27 08:44:11
@k2k : Hello, I see that has been released a new version 2.7.3.
However, on the official web site there is no Release Note or Change Log (and never was).
Do you know what's changed?
Regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-10-27 11:15:39
News
New version released ( v2.7.3 ).
This update is our response to those users who asked us about the possibility of trying B&K and Harman target curves. Some explanations are given at the beginning of the Room EQ FAQ: https://mathaudio.com/room-eq-faq.htm
Title: Re: MathAudio Room EQ for Foobar2000
Post by: darkflame23 on 2019-10-27 12:26:50
Is there a mic calibration file for the Neumann KM84 (Cardioid) or KM83 (Omni), and if so, where can I find them?
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-10-27 14:36:36
Is there a mic calibration file for the Neumann KM84 (Cardioid) or KM83 (Omni), and if so, where can I find them?
Both these mics are not good for the room measurement. You may want to look at this one (https://www.minidsp.com/products/acoustic-measurement/umik-1) (USB) or this one (https://www.bhphotovideo.com/c/product/747384-REG/Nady_CM_100_CM_100_Reference_Measurement.html/reviews) (phantom powered).
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-10-27 19:09:57
News
New version released ( v2.7.3 ).
This update is our response to those users who asked us about the possibility of trying B&K and Harman target curves. Some explanations are given at the beginning of the Room EQ FAQ: https://mathaudio.com/room-eq-faq.htm

@k2k : Hello K2K, thanks for the clarification, however I couldn't understand how then restore the default target curve in case the loaded one is not liked.
Regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-10-27 20:47:02
@k2k : Hello K2K, thanks for the clarification, however I couldn't understand how then restore the default target curve in case the loaded one is not liked.
Regards, Andrea
Simply click the "Bright" button or the "Neutral" button.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-10-29 16:47:52
Many thanks for your kind support. (:->)
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-11-24 23:52:20
News
New version released ( v2.7.4 ).
The new version includes a new graphical user interface.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-11-25 09:11:19
Hello @k2k , thanks for the update.
Unfortunately on the official website there are no release notes... Do you know where can I get the "release notes"?
Reading the new documentation (very little) there are no more references to uploading of target curves.
Do you know if this last feature is still present or gone away?
Kind regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-11-25 14:23:43
Hello @k2k , thanks for the update.
Unfortunately on the official website there are no release notes... Do you know where can I get the "release notes"?
Reading the new documentation (very little) there are no more references to uploading of target curves.
Do you know if this last feature is still present or gone away?
Kind regards, Andrea
Yes, this feature is still present. You can read about it at the beginning of the Room EQ FAQ: https://mathaudio.com/room-eq-faq.htm
We often publish some information about new releases on this forum.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-11-25 18:41:05
Hello @k2k, many thanks for your prompt reply and for directing me to the Room EQ FAQ.
Kind regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-11-26 16:36:29
News
New version released ( v2.7.5 ).
Minor improvements in GUI.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-12-01 18:23:19
Hello @k2k, today I upgraded your component from the v2.7.1 to the last v2.7.5.
Very good to have now integrated the measuring options.

However, the Signal Output selection is limited and, in my opinion, has also a bug.

LIMITATION FOUND
As per attached screeshot, in my DSP Chain, your Room EQ is not the last component.
My last component is Thuneau Allocator (and it must be the last one). It is a X-over and phase arbitrator.
So, I need to inject your sweep signal into it, or, in other words, to have your Signal Out routed into it, simply following the DSP chain.

ASIO PROBLEM
I am using a professional MOTU 896mk3 DAC that makes use of the MOTU ASIO driver.
Well, even selecting any usable ASIO output, I cannot get any sweep out from within Foobar.

Instead everything is working as expected setting up an appropriate DAW project within Cantabile and using the VST2 demo plug-in.

Kind regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-12-01 22:19:41
Hello @k2k, today I upgraded your component from the v2.7.1 to the last v2.7.5.
Very good to have now integrated the measuring options.
However, the Signal Output selection is limited and, in my opinion, has also a bug.
The measurement subsystem of the Foobar2000 version of Room EQ doesn't work with ASIO drivers. It works with conventional Windows drivers. As far as I understand your DAC includes such drivers and you can use them for measurement.

The Foobar2000 version of Room EQ cannot 'inject' the sweep sound to another Foobar2000 component. You can chain the Room EQ component with other Foobar2000 components for playback only, not for measurement.
The VST version of Room EQ can "inject" the sweep sound to another VST plug-in, but I don't know whether the Thuneau Allocator is available as a VST plug-in.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-12-02 07:53:49
Hello @K2K, thanks for the details, I was unaware of this Foobar limitation.
So, I will keep going as in the past, using Cantabile and the VST demo version for measurement.
PS: Thuneau Allocator is a VST2 plug-in and I am using it within Foobar via the VST wrapper.
Kind regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-12-12 08:39:38
Hello @k2k,
my audio system is all time playing at 24bit 96kHz and I have ESL loudspeaker capable (measured with REW) to play up to 30..35kHz.
Also my subwoofer systems can go down to approximately 15Hz.
So, my question is: is there any option to have Room EQ serving the range 15Hz to 35kHz?
Or, is it eventually possible to use REW to measure the response as wide as I want and then to load it into Room EQ?
Thanks and regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-12-12 12:56:23
Hello @k2k,
my audio system is all time playing at 24bit 96kHz and I have ESL loudspeaker capable (measured with REW) to play up to 30..35kHz.
Also my subwoofer systems can go down to approximately 15Hz.
So, my question is: is there any option to have Room EQ serving the range 15Hz to 35kHz?
Or, is it eventually possible to use REW to measure the response as wide as I want and then to load it into Room EQ?
Thanks and regards, Andrea
Room EQ works in the audio frequency range of 20 Hz to 20 kHz. Room EQ doesn't linearize the frequency response at infrasound and ultrasound frequencies.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-12-17 10:43:03
Hello @k2k, I have another question for you: is there any option to read / open the .snr config file?
Is it possible to convert to any standard format file readable by REW?
I think it would be useful to have the option to manually modify specific response points.
Kind regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-12-17 13:04:04
No, you cannot read the SNR file or use it in another EQ program.
You can easily modify any point of the target curve with your mouse:
left button - arbitrary points,
right button - straight lines,
mouse wheel - single point on one of the plots (left or right).
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-12-17 13:36:05
Hello @k2k, my intention is not to use the SNR file with other EQs.
I just would like to better have the control of what going on during the equalization.
I know the possibility of using the mouse ... but you should know that it has many limitation, low accuracy and practically no way to see exactly what I am doing where... I mean, I cannot dial in precise value I get from another computational model (this just for example).
I understand I am not the average user... I am now using Room EQ for "audio experiments" searching for improvements over my legacy DRC solution. To be honest, so far I didn't find out a really winning set-up. I mean, I found Room EQ an excellent tool, basically very fast to setup, but at the same time too limited for getting an absolute fine tuning that would allow it to win (get absolute better audio performance) against my legacy DRC.
Anyway, thanks so much for this Foobar component and all the best for your future developments.
Kind regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2019-12-19 06:46:54
Hello @k2k, do you know Dirac Live?
They state to use an innovative "Mixed-phase room correction technology" surpassing  any prior or competing solution.
If you know about, would you kindly give us your opinion or compare your solution with it?
Thanks and regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2019-12-19 13:05:11
Hello @k2k, do you know Dirac Live?
They state to use an innovative "Mixed-phase room correction technology" surpassing  any prior or competing solution.
If you know about, would you kindly give us your opinion or compare your solution with it?
Thanks and regards, Andrea
We don't discuss competitors.
Key features of our technology are listed at https://mathaudio.com/why-room-eq.htm
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Melomane on 2020-01-17 20:37:28
hello , i cannot acces to https://mathaudio.com from at least 3 days.
i am alone?

Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-01-18 14:20:45
hello , i cannot acces to https://mathaudio.com from at least 3 days.
i am alone?
I've just tested https://mathaudio.com from multiple countries. Everything works. Please send me your IP address and I will check it in our firewall. You can see your IP address at https://www.whatismyip.com/  I've sent you a personal message with my email address.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Melomane on 2020-01-18 16:25:11
hello , i cannot acces to https://mathaudio.com from at least 3 days.
i am alone?
I've just tested https://mathaudio.com from multiple countries. Everything works. Please send me your IP address and I will check it in our firewall. You can see your IP address at https://www.whatismyip.com/  I've sent you a personal message with my email address.
it is à problem with my internet access provider, sorry.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Papi Chulito on 2020-03-10 06:51:22
Hello K2K.

First off, congratulations on a truly wonderful software program, and THANK YOU for making it available to FB2K users at no cost. It is easy to use, very powerful and IT WORKS!!! I had a really bad room resonance (+15 dB peak at 50 Hz!) and Room EQ was able to null it out. My system sounds so much better now!!!

I have a few questions for you:

1) I'm using an Dayton UMM-6 USB mic with calibration file, and measuring my room with a normal 2-channel stereo setup. Your instructions say to point the mic straight up at the ceiling from listening position, but my mic calibration file is specifically calibrated at ZERO degrees. In this case, should I not be pointing the mic horizontally at the space midway between my two speakers? Will I get a more accurate reading this way? I don't understand why I should be pointing it at the ceiling! High frequency response (>10 kHz) of the microphone must drop off considerably @ 90 degrees off axis, no???

2) Is it possible to use Room EQ simultaneously with another DSP EQ program running on FB2K? In my case, I have open baffle speakers paired to subwoofers. There is a significant response dip where the subwoofer and OB speakers "crossover" - so I use a DSP equalizer to boost that dip to get a flatter response.

If I have that DSP EQ program running as normal, can I then use Room EQ and do a room measurement while both are running? What about after I apply room EQ to my system - can I have the two programs running at the same time on FB2K? Will they interact or cause problems?

I think I read somewhere that if concurrent DSP programs are being used, Room EQ should be the LAST (or bottom) program in the "active DSP list" in FB2K? Is this correct?

Thanks again for giving us such a wonderful program. It is truly a fantastic addition to my sound system!

Papi Chulito
Northern Arizona, USA
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-03-11 19:58:41
Hello Papi,
1) The high frequency response will drop off a little in any case (pointing the microphone at the point between your speakers doesn’t ideally solve the problem). On the other hand, pointing the microphone at the ceiling makes the microphone equally sensitive to the wall reflection, and this factor is very important. Ideally, a 90 degrees calibration file is preferable, but a zero degrees calibration file normally doesn’t produce an audible distinction.
2) The Foobar2000 version of Room EQ has its own audio output for the sweep sound. In other words, the sweep sound is not processed by any other Foobar2000 components that are present in the chain. You may want to try to avoid usage of the additional boosting equalizer. Simply move down the vertical slider of Room EQ to compensate for the dip (or increase the cut-off frequency of your subwoofer to avoid the dip).
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Papi Chulito on 2020-03-12 04:47:53
Hello Papi,
(snip)...
...You may want to try to avoid usage of the additional boosting equalizer. Simply move down the vertical slider of Room EQ to compensate for the dip (or increase the cut-off frequency of your subwoofer to avoid the dip).
Hi K2K, and thanks for your response. Unfortunately, I have a problem that will persist, regardless of your excellent suggestion.

My main speakers start a steep roll-off at about 200 Hz. I tried adjusting the crossover frequency on my woofer as high as it would go...and to my surprise it only goes to ~125 Hz, then drops off at 24 dB/octave. Even with the crossover F set up high, there is a rather deep suck out between 125 and 200 Hz...a critical zone for upper bass guitar.

You are correct in that I could drop the correction curve WAY down to the bottom of that trough. I tried that, and as you can imagine, the resulting sound was "artificial" and lifeless. Like many other users, I have found that DSP corrections sound best when used sparingly...I set my correction curve (Bruel and Kjaer) to allow for a bit of ripple below the line - this makes the system sound the most realistic to me. Human hearing is complex...it almost appears humans want some deviation from a perfect curve to sound "real."

So how did I solve the problem? After placing the correction curve to where I liked it, I noted the center F and depth of the remaining troughs. I used another DSP program called Easy Q to apply a boost where appropriate. I am happy with the result! Easy Q seems to work together with Room EQ without any negative artifacts...at least none that I can hear. I'm using a Intel Core 5 that appears to handle the double DSP processing duties without bogging down in the least.

Is it OK for me to continue using the two DSP programs together as I outlined?

Thanks again! 

    
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-03-13 08:37:33
Is it OK for me to continue using the two DSP programs together as I outlined?
Hi Papi,
There is no problem with your setup.
You can use free MathAudio Headphone EQ component for Foobar2000 instead of a conventional equalizer. Headphone EQ can work as a conventional equalizer and it 'always' uses 64-bit floating-point filters - even if you use 32-bit Windows or 32-bit CPU.

Title: Re: MathAudio Room EQ for Foobar2000
Post by: Papi Chulito on 2020-03-14 07:33:51
Is it OK for me to continue using the two DSP programs together as I outlined?
Hi Papi,
There is no problem with your setup.
You can use free MathAudio Headphone EQ component for Foobar2000 instead of a conventional equalizer. Headphone EQ can work as a conventional equalizer and it 'always' uses 64-bit floating-point filters - even if you use 32-bit Windows or 32-bit CPU.
K2K,

OK, great! Thanks for the tip on your headphone EQ program. I'll try it out!

My only "dream wish" at this point would be for the Room EQ and Headphone EQ programs to be integrated, so that the test tone sweep for Room EQ comes from the Headphone EQ program. This way, I could dial in the lift I need at my sub/main speaker crossover point, and then see the result by sweeping with Room EQ...to make final corrections for room reflections, bass resonant peaks, etc. I think using Room EQ + a "standard" DSP EQ in consort is a better sounding approach than just bringing the Room EQ correction curve down so low that it takes the "life" out of the sound. Just my opinion!  

That combo of integrated programs would be the ULTIMATE solution for every possible application an audiophile might have!

Thanks again!
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-03-15 09:37:32
My only "dream wish" at this point would be for the Room EQ and Headphone EQ programs to be integrated, so that the test tone sweep for Room EQ comes from the Headphone EQ program. This way, I could dial in the lift I need at my sub/main speaker crossover point, and then see the result by sweeping with Room EQ...to make final corrections for room reflections, bass resonant peaks, etc.
You can do it right now by means of using demo versions of VST plug-ins for measurement, saving the resultant presets and loading that presets to the Foobar2000 versions of Room EQ and Headphone EQ. The process is as follows:
1. Install demo version of Reaper (you can download it from https://reaper.fm)
2. Download demo versions of Room EQ VST and Headphone EQ VST from https://mathaudio.com/download.htm
3. Add Room EQ VST to Reaper as it is shown at https://mathaudio.com/images/reaper.png
4. Add Headphone EQ VST to Reaper in series with Room EQ VST to process the sweep tone with the Headphone EQ VST.
5. Measure your room and adjust all the desirable settings of both Room EQ and Headphone EQ.
6. Save the presets of both Room EQ and Headphone EQ as .snr and .hdp files correspondingly.
7. Add both Room EQ and Headphone EQ components to Foobar2000 and load the .snr and .hdp files to the corresponding components.
8. Click the "Apply" button.
That's all.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: rpnfan on 2020-03-25 20:58:55
I just would like to better have the control of what going on during the equalization.
I know the possibility of using the mouse ... but you should know that it has many limitation, low accuracy and practically no way to see exactly what I am doing where... I mean, I cannot dial in precise value I get from another computational model (this just for example).

I second Andrea's wish. I wanted to register Mathaudio for a looooong time, but held back, because it lacks the control one has with other systems. Mathaudio EQ is a "black box" correction. This alone would be fine for me, but I also would like to have control over:

* target curves in a numerical way (for example by importing a custom target curve)
* be able to test different multi-point measurements by
   a) making as many measurements as I want (which are then stored and can be accessed later)
   b) then separately choosing which of those measurements to use for the multi-point calibration

This would give a very effecient way to test if enlarging the multi-point measurement area and / or adding more spots will be benefitial for a specific setup or not.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-03-26 01:34:43
I wanted to register Mathaudio for a looooong time,
MathAudio Room EQ for Foobar2000 is free. You don't need to register it.
I also would like to have control over:
* target curves in a numerical way (for example by importing a custom target curve)
You can already do it. See the first question at our FAQ https://mathaudio.com/room-eq-faq.htm  You can download bruelandkjaer.targetcurve and manually edit its numerical values. You can also import other target curves in the ".targetcurve" format.
I second Andrea's wish.
Room EQ's filters include many hundreds of coefficients. All of them are interrelated. Changing one coefficient totally change the response of Room EQ in hardly predictable way. You can easily get unpleasant instability issues if you change the coefficients manually. This is the case when an automatic method is much more accurate than a manual one.
* be able to test different multi-point measurements by
   a) making as many measurements as I want (which are then stored and can be accessed later)
   b) then separately choosing which of those measurements to use for the multi-point calibration
You can make as many sets of measurements as you wish and store them as SNR files. After that you can use the "Load preset" button to load them one by one and compare the sound.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: rpnfan on 2020-03-27 20:05:04
Thanks for the answer.
I did not mean Mathaudio for foobar, but the general version which works systemwide.

Great that target curves work now. This is relatively new, was not there when I tested the last time.

My wish on influence was not to be able to configure filters -- I know that a Blackbox approach is given here. My wish was to be able to quicker and easier manage measurements for multiple point calibrations. But it seems this is now also possible. I'll give it a try! :-)

Very curious to see how my tests will turn out! :-)

Thanks for offering the foobar version for free!
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Enri-audio on 2020-03-29 15:39:30
Hi K2K, thank you very much for the beautiful software that I use with Foobar that allows you to easily have an excellent sound. With my system, applying the neutral curve the result is very good, but I miss a bit of bass. In your graph the neutral curve appears to be contained from 20 Hz to 20K within 5 decibels, while in the graphs of the bruel & kjaer 1974 Moller curve the curve appears to be within 6 decibels. Maybe that's why it seems to me that a little bit of bass is missing, they should be increased by about a decibel? Thanks again for the wonderful software
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-03-29 20:53:47
Hi K2K, thank you very much for the beautiful software that I use with Foobar that allows you to easily have an excellent sound. With my system, applying the neutral curve the result is very good, but I miss a bit of bass. In your graph the neutral curve appears to be contained from 20 Hz to 20K within 5 decibels, while in the graphs of the bruel & kjaer 1974 Moller curve the curve appears to be within 6 decibels. Maybe that's why it seems to me that a little bit of bass is missing, they should be increased by about a decibel? Thanks again for the wonderful software
Hi Enri-audio, if you you wish to try the Bruel & Kjaer curve, you can download it from our web site. See the first question at Room EQ FAQ: https://mathaudio.com/room-eq-faq.htm
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Enri-audio on 2020-04-11 13:42:09
Hi K2K, thanks for the bruel & kjaer curve! I made my hi-fi system with 2 differently positioned subwoofers, two front speakers and two others that play sideways upwards. By controlling the amount of indirect sound there is an almost holographic stereophony. With your system I can simply equalize this complex system, the result is truly excellent, thanks again!
I noticed that if I measure the room with the volume of the sweep a little high, even without any distortion, I get a sound with less low frequencies. if I take the measurement at a lower volume, the graph of the frequency response shifts very slightly downwards but it seems practically the same, yet the bass goes well and the listening is extraordinary. Can you tell me why? Maybe the sweep volume should be similar to the volume used when listening to music? Thank you
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-04-11 19:04:08
Hi K2K, thanks for the bruel & kjaer curve! I made my hi-fi system with 2 differently positioned subwoofers, two front speakers and two others that play sideways upwards. By controlling the amount of indirect sound there is an almost holographic stereophony. With your system I can simply equalize this complex system, the result is truly excellent, thanks again!
I noticed that if I measure the room with the volume of the sweep a little high, even without any distortion, I get a sound with less low frequencies. if I take the measurement at a lower volume, the graph of the frequency response shifts very slightly downwards but it seems practically the same, yet the bass goes well and the listening is extraordinary. Can you tell me why? Maybe the sweep volume should be similar to the volume used when listening to music? Thank you
Hi Enri-audio, dynamic speakers are non-linear devices. They always produce some non-linear distortion even if you don't hear it. Usually the non-linear distortion increases with the volume and affects the frequency response of speakers. Normally the sweep volume should be similar to your listening volume. Too high sweep volume can reduce the accuracy of the measurement. If you wish to accurately measure the non-linear distortion in your audio system, you can use free MathAudio THD Meter which can be downloaded from https://mathaudio.com/download.htm (you need a demo version of Reaper https://www.reaper.fm or any other DAW to use the THD Meter).
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Enri-audio on 2020-05-02 10:39:01
Hi k2k, I noticed that by measuring the room, decreasing or increasing the buffer of the input and output card, there is a minimal effect on the sound of the equalization. For now in tests that I made a 512 S buffer it sounds better. Can you recommend the optimal values to use?
Should the buffer of Foobar2000 also be changed, or is it bypassed?
Also I would like to know if there is a stand-alone version of Mathaudio to buy, it would be very useful to me.
Thanks and bye!
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-05-02 20:47:13
Hi k2k, I noticed that by measuring the room, decreasing or increasing the buffer of the input and output card, there is a minimal effect on the sound of the equalization. For now in tests that I made a 512 S buffer it sounds better. Can you recommend the optimal values to use?
Should the buffer of Foobar2000 also be changed, or is it bypassed?
Also I would like to know if there is a stand-alone version of Mathaudio to buy, it would be very useful to me.
Thanks and bye!
Hi  Enri-audio,
The quality of the sound does not depend on the size of the buffer at all, however, if the buffer is too small, old computers may produce pauses between buffers that sound like loud crackles. Foobar2000 and your audio card may use different sizes of buffers - this fact doesn't affect the sound. If you don't hear the loud crackles, the size of the buffer is sufficient and you should not worry about it.
Room EQ can be used as a system wide equalizer on your computer if you need it: https://mathaudio.com/system-wide-eq.htm
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Enri-audio on 2020-05-02 23:41:16
Hi k2k, thank you very much for the possibility that Mathaudio provides as a system equalizer. For the difference in sound of the equalization depending on the buffer, I confirm that I have done hours of listening tests on a hi-end system, which confirm that the 512s setting gives the best results. I repeated the measurements several times; I don't know if this is the only parameter that varies, but for now I have no other hypothesis. I tried starting from 32s to more than 1000, the best results are always at 512 s. In any case, what do you recommend? For example, can the size of the buffers influence the synchronization of the signal, between what comes out of the audio system and what is processed by the software? In this case, should we have the lowest buffer, but compatible with the processing capacity of the PC? Or what could be the reason? Thanks again
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-05-03 10:22:03
Hi k2k, thank you very much for the possibility that Mathaudio provides as a system equalizer. For the difference in sound of the equalization depending on the buffer, I confirm that I have done hours of listening tests on a hi-end system, which confirm that the 512s setting gives the best results. I repeated the measurements several times; I don't know if this is the only parameter that varies, but for now I have no other hypothesis. I tried starting from 32s to more than 1000, the best results are always at 512 s. In any case, what do you recommend? For example, can the size of the buffers influence the synchronization of the signal, between what comes out of the audio system and what is processed by the software? In this case, should we have the lowest buffer, but compatible with the processing capacity of the PC? Or what could be the reason? Thanks again
Hi  Enri-audio,
I have no idea why the buffer of 512 samples can sound better than the buffer of 1024 or 2048 samples. Large size buffers help to avoid interruptions of sound on old slow computers, that is why Foobar2000 uses so large default buffer size (1000 ms). Small size buffers help to reduce the latency of audio systems which is important for direct monitoring, live performances and watching video. If you use Foobar2000 for playing music, the latency is not important, so you can safely use a large buffer size. Room EQ processes all buffer sizes without any distinction - every bit of the digital stream remains the same. Try to set your audio card to the largest possible buffer size to minimize the load on the CPU.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Enri-audio on 2020-08-09 14:29:33
 hi k2k, i bought a license to use mathaudio as vst on cubase, where should i put the code to activate it? thank you
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Enri-audio on 2020-08-09 14:30:55
 hi k2, i bought a license to use mathaudio as vst on cubase, where should i put the code to activate it? thank you
Title: Re: MathAudio Room EQ for Foobar2000
Post by: Enri-audio on 2020-08-09 15:51:04
Also I can't use it with Cubase. If I use mathaudio as a system equalizer, it works if I play an audio file, but not with Cubase. if i load it as cubase vst plugin, it beeps even though i put the key code in the registry.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-08-09 19:58:26
Also I can't use it with Cubase. If I use mathaudio as a system equalizer, it works if I play an audio file, but not with Cubase. if i load it as cubase vst plugin, it beeps even though i put the key code in the registry.
Hi Enri-audio, the registration button is located in the "About" dialog. If you have any other questions concerning the VST version of the plug-in, please contact us directly at https://mathaudio.com/contact.htm 
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-08-11 22:00:19
News
New version released ( v2.7.7 ).
v2.7.7 uses newer versions of Foobar2000 SDK and Windows SDK.
Windows XP and Windows Vista are no longer supported.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: AndreaT on 2020-08-12 09:40:55
Hello @k2k,
thanks for the news!

However, I am not so expert on the matter of SDK and I would like to know what's the improvement achieved?
I mean, I am running Foobar on Windows 10, and does this v 2.7.7 run better? Less memory usage? Less CPU load?

If I am happy with the v 2.7.6, why I should upgrade it?
Thanks and regards, Andrea
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-08-12 12:19:29
Hello @k2k,
thanks for the news!

However, I am not so expert on the matter of SDK and I would like to know what's the improvement achieved?
I mean, I am running Foobar on Windows 10, and does this v 2.7.7 run better? Less memory usage? Less CPU load?

If I am happy with the v 2.7.6, why I should upgrade it?
Thanks and regards, Andrea
Hello Andrea,
v2.7.7 is compiled with a newer compiler which knows and uses the advantages of the latest types of CPU. Most probably v2.7.7 puts less load on the CPU if you use a last-generation CPU chip, though we did not make such measurements. We updated the plug-in to make it more compatible with future releases of Windows and Foobar2000. We wish to be sure that the plug-in will not stop working after the next Windows update. Our previous ten-years-old compiler was optimized for Windows XP and nobody guarantees its compatibility with future updates of Windows 10. That is why we decided to move to a newer technology.
The new version of Room EQ doesn't bring any changes in the sound, so there are no urgent reasons to upgrade.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: czt on 2020-10-11 13:02:55
Hi, any idea why the measurement sweep signal sounds crackling if Windows default format set on 48 kHz and no crackling on 44.1 kHz using Lexicon Alpha? (I want to show it with a screen recording, but in that no crackling.)
Title: Re: MathAudio Room EQ for Foobar2000
Post by: czt on 2020-10-11 17:13:23
Hi, any idea why the measurement sweep signal sounds crackling if Windows default format set on 48 kHz and no crackling on 44.1 kHz using Lexicon Alpha? (I want to show it with a screen recording, but in that no crackling.)

Nothing matters, either (now default) WASAPI shared or exclusive output used, as soon as the Room Measurement radio button selected the system sounds distorted (with 48 kHz default formats) or noisy even without playback (with 16 bit default formats). The only usable setting is 24 bit and 44.1 kHz.
Standard USB audio device drivers used by Windows 10 for Lexicon Alpha.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: czt on 2020-10-12 14:57:47
Just out of curiosity (because it's a obsolete HW) I tested (v2.7.7) with my workplace PC's VT1705 VIA codec and even the Start Measurement button not working (foobar v1.6.1 default - WASAPI shared - output).
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-10-14 20:37:08
Hi, any idea why the measurement sweep signal sounds crackling if Windows default format set on 48 kHz and no crackling on 44.1 kHz using Lexicon Alpha? (I want to show it with a screen recording, but in that no crackling.)
I don't know the reason of this problem, but the accuracy of measurement doesn't depend on the sampling rate. You can safely use 44.1 kHz for measurement.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-10-14 20:45:08
Just out of curiosity (because it's a obsolete HW) I tested (v2.7.7) with my workplace PC's VT1705 VIA codec and even the Start Measurement button not working (foobar v1.6.1 default - WASAPI shared - output).
Click the "In/Out" button and select the necessary audio output. Make sure that nothing takes exclusive control of the audio device's driver (including Foobar2000).
Title: Re: MathAudio Room EQ for Foobar2000
Post by: czt on 2020-10-14 22:30:32
I don't know the reason of this problem, but the accuracy of measurement doesn't depend on the sampling rate. You can safely use 44.1 kHz for measurement.

Yes, fortunately accuracy not affected, and at least one default format still works. The whole thing just occurred in the first place because with this device the Windows default is 24/48. It's only a suspicion that one reason might be the rework for the new foobar (beside driver or HW reasons), but without previous version I cannot test this.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-10-15 08:20:46
Yes, fortunately accuracy not affected, and at least one default format still works. The whole thing just occurred in the first place because with this device the Windows default is 24/48. It's only a suspicion that one reason might be the rework for the new foobar (beside driver or HW reasons), but without previous version I cannot test this.
Most probably this is a driver problem. If you set your audio card to the default sampling rate of 48 kHz, the audio player should be able to switch it to 44.1 kHz when necessary. If the driver doesn't allow switching the sampling rate, it may result in the "crackling". Try to find and install the latest driver for your audio interface. If the driver is not designed specifically for your version of Windows, it is better to set it to the default frequency of 44.1 kHz because 44.1 kHz is the sampling rate of majority of audio files in existence. You can check your audio driver like follows. Set the audio driver to 48 kHz, remove Room EQ from Foobar2000, switch Foobar2000 to a conventional audio driver (not WASAPI) and try to play a conventional audio file with the sampling frequency of 44.1 kHz. If you hear the "crackling", most probably this is a driver problem.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: k2k on 2020-10-15 14:15:57
I've just found out that Foobar2000 v1.6.1 uses a new default WASAPI output, so you cannot use it to test DirectSoud drivers. In any case I think that the problem is caused by the audio driver. A lot of audio cards have problems with automatic sample rate switching. This is not a large problem because you can manually set your card to 44.1 kHz for the measurement.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: czt on 2020-10-15 16:22:37
I've just found out that Foobar2000 v1.6.1 uses a new default WASAPI output, so you cannot use it to test DirectSoud drivers. In any case I think that the problem is caused by the audio driver. A lot of audio cards have problems with automatic sample rate switching. This is not a large problem because you can manually set your card to 44.1 kHz for the measurement.
Yes that's what I wanted to emphasize. But I wrongly misinterpreted in your latest change log that foobar's change to WASAPI shared output is one reason for the modernization of the latest version. And that's why I maintained the possibility that Room EQ device access through foobar might be one reason. The driver is the latest, but as I found out only the USB device node using manufacturer components. There is no problem when I play 44.1/48 kHz sources with WASAPI exclusive which demands sample rate change from the device. Anyway, thanks a lot. If I want, I will do DirectSound tests with previous foobar version, and next week I hope I can start the measurements and corrections with your free plugin which I very much appreciate.
Title: Re: MathAudio Room EQ for Foobar2000
Post by: czt on 2020-10-22 17:24:18
foobar2000 1.6.2 (https://www.foobar2000.org/changelog) fixed the problem most likely with this: "Added workarounds for wrong audio mix format reported by certain buggy soundcard drivers. (beta 3, beta 4)". Room EQ does an awesome job with cleaning my most compromised 100-500 Hz range.
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