Submit your EQ Curves

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Submit your EQ Curves

Permanent link to this post Posted by steve » Fri Jun 18, 2010 10:34 am


DOWNLOADS:

The latest (still experimental) 78 RPM EQ Curve Generator can be downloaded by clicking this link.



Many moons ago there was a feature request for a way to import/export Equalization curves (without needing to manually edit the EQCurves.xml file). This feature is now available in the latest "Nightly" build of Audacity.
(see here for Audacity nightly builds - http://wiki.audacityteam.org/index.php? ... tly_Builds )

This new feature is implemented with a "Manage Curves" dialogue accessed by a "Save/Manage curves..." button. This button replaces the previous "Save As" and "Delete" buttons. "Custom" curves are now called "unnamed".
This is an opportunity for Audacity users to contribute Equalization curves they would like to be available either as "default" presets that all users will have, or as "optional" presets that can be specially imported.

"Manage Curves" provides an easy way to manage pre-set curves. You can save unnamed curves to the list of curves, rename, re-order or delete individual or multiple curves, and import/export .xml files containing individual or multiple curves. When you change the curves list, an automatic backup is made to EQBackup.xml, so if you make a mistake you can import that backup file. You can also restore the presets to the default set, which removes any customised curves you saved.

You can read the full story here: http://audacity.238276.n2.nabble.com/Be ... l#a4719919 .


  • The new default curves set is not finished yet and so far only contains curves for amradio, acoustic and 60 Hz notch. EDIT:The Windows Nightly Build includes the preliminary default set EQCurves.xml in the same folder as the executable. On Mac or Linux you can download this default EQCurves.xml at "Proposed default curves" on: http://wiki.audacityteam.org/wiki/EQCurvesDownload . Place EQcurves.xml in your Audacity installation folder for Audacity to find it. Please paste new curves for the default set on: http://wiki.audacityteam.org/wiki/Default_EQCurves .
  • There isn't yet a useful selection of optional presets to import. You can upload .xml files containing suggested optional curves for the library to: http://wiki.audacityteam.org/wiki/EQCurvesDownload

The easiest way to create a curve is to save it, then export it with the name you like. Audacity will add an .xml extension to the file name. Include "default" or "optional" in the file name so we know what usage you think the curve should have.

As an alternative to posting curves on the Wiki, you can post them here by making them into a zip file and uploading the zip as an attachment in replies to this topic. You can't attach .xml files directly to the Forum, but you can rename the .xml file with a .txt extension and add that as an attachment. (Please don't post curves as inline text in your post as they tend to be rather long and forum has a habit of messing up text formatting.)
Last edited by steve on Fri Apr 24, 2015 3:25 pm, edited 11 times in total.
Reason: added link to current 78 RPM Curve Generator
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Re: Submit your EQ Curves

Permanent link to this post Posted by whomper » Fri Jun 18, 2010 5:15 pm

cant edit the discussion page so
here are some ideas

cant be many preset eq curves of value
RIAA maybe some 78s
after that they are all really custom
say for your room and speakers

maybe a set of fletcher munson curves by SPL
sort of a more customisable "loudness" as was noted

if you want some standard eqs then look at realtek
they have 4 standard ones :
pop live club rock
pick the settings off their picture and convert to coded values

and they have fx processing (dont think you can copy those though):
bathroom sewerpipe auditorium arena stonecorridor

but if you have realtek you can pick them from realtek already
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Re: Submit your EQ Curves

Permanent link to this post Posted by steve » Fri Jun 18, 2010 5:54 pm

Thanks for your contribution whomper, but what is really needed are the actual XML files.
Could you make the XML files for those settings and upload them here as described?
9/10 questions are answered in the FREQUENTLY ASKED QUESTIONS (FAQ)
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Re: Submit your EQ Curves

Permanent link to this post Posted by Gale Andrews » Sat Jun 19, 2010 3:16 am

whomper wrote:maybe
point me to the xml tutorial
and we will see if i have the smarts to figure it out


There isn't really an "xml tutorial" apart from this post by Steve, but a valid xml file as exported from "Manage Curves" has this structure:
Code: Select all
<equalizationeffect>
   <curve name="new default walkie talkie curve">
      <point f="100.000000000000" d="-20.000000000000"/>
      <point f="125.000000000000" d="-16.000000000000"/>
   </curve>
</equalizationeffect>


Strictly speaking, <equalizationeffect> and </equalizationeffect> aren't needed if importing an .xml file containing a single curve. Otherwise the opening and closing <equalizationeffect> tags are necessary.

When you import the xml file into Audacity <equalizationeffect> and </equalizationeffect> are stripped out from your curve so that the xml file Audacity works with just has one instance of <equalizationeffect> and </equalizationeffect>.



Gale
Last edited by Gale Andrews on Fri Apr 24, 2015 3:25 pm, edited 3 times in total.
Reason: Clarify that <equalizationeffect> and </equalizationeffect> are needed except when importing an xml file with a single curve
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Re: Submit your EQ Curves

Permanent link to this post Posted by kozikowski » Sat Jun 19, 2010 4:13 am

Some of the space and carriage return formatting goes away when I post it like this, but the values should be OK.



100Hz Rumble Filter by kozikowski. 20081118

After the Shure A15HP microphone filter.

Find EQCurves.xml in Your Audacity 1.3.x install. Open it in a plain
text editor. Copy the following code and paste it between
the existing filters. Save the new file. Koz


<curve name="100Hz_Rumble">
<point f="25.558066373145" d="-40.000000000000"/>
<point f="31.632604280524" d="-39.353843688965"/>
<point f="37.316881063924" d="-37.953842163086"/>
<point f="42.635296659786" d="-36.230766296387"/>
<point f="49.237316986327" d="-33.107692718506"/>
<point f="54.196034330446" d="-29.553844451904"/>
<point f="88.033573501041" d="-6.923076629639"/>
<point f="95.871851182279" d="-4.523078918457"/>
<point f="108.957037410504" d="-1.938461303711"/>
<point f="123.828171198057" d="-0.738462448120"/>
<point f="149.228077614658" d="-0.092308044434"/>
</curve>
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Re: Submit your EQ Curves

Permanent link to this post Posted by kozikowski » Sat Jun 19, 2010 4:16 am

It's not perfect because the Q of the filter and the defined points don't match.
http://kozco.com/tech/audacity/100Hz_Rumble.jpg

Koz
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Re: Submit your EQ Curves

Permanent link to this post Posted by Gale Andrews » Sat Jun 19, 2010 8:33 am

I haven't got time to produce possible Audacity curves myself but maybe as a starting point for someone to customise:

First, the sony-oxford R3 EQs from this page:
http://www.sonnoxplugins.com/pub/plugin ... le2-eq.htm

Second, http://sjeng.org/ftp/fb2k/eq_presets.zip

Those are .feq presets for Foobar 2000, but they are plain text files with 18 gain values for the following frequencies in Hz:

55, 77, 110, 156, 220, 311, 440, 622, 880, 1200, 1800, 2500, 3500, 5000, 7000, 10000, 14000, 20000

The 20 presets in the zip are:

1965
Air
Brittle
Car Stereo
Classic V
Clear
Dark
DEATH
Drums
Flat
Home Theater
Loudness
Metal
Pop
Premaster
Presence
Punch & Sparkle
Shimmer
Soft Bass
Strings

More explanation of how to use the above data is at viewtopic.php?p=203701#p203701 .

Gale
Last edited by Gale Andrews on Fri Apr 24, 2015 3:25 pm, edited 2 times in total.
Reason: added a link to http://forum.audacityteam.org/viewtopic.php?p=203701#p203701
________________________________________FOR INSTANT HELP: (Click on Link below)
* * * * * Tips * * * * * Tutorials * * * * * Quick Start Guide * * * * * Audacity Manual
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Re: Submit your EQ Curves

Permanent link to this post Posted by whomper » Sat Jun 19, 2010 3:26 pm

Gale Andrews wrote:
whomper wrote:maybe
point me to the xml tutorial
and we will see if i have the smarts to figure it out


There isn't really an "xml tutorial" apart from this post by Steve, but a valid xml file as exported from "Manage Curves" has this structure:...
When you import the xml file back into Audacity and exit, <equalizationeffect> and </equalizationeffect> are stripped out from your curve so that the saved xml file that Audacity loads at restart just has one instance of <equalizationeffect> and </equalizationeffect>.
...
whomper wrote:do you really want to trust something like that
done by a "probationer" ?? :shock:


Absolutely 8-)! Then you'll earn some more brownie points towards no longer being in that category. ;)

Gale


if that is what you mean by xml then i could possibly duplicate that format okay. i thought xml was some odd formatting for ms word.

gee, i was hoping for a gold star too, if not the ability to delete spam with a single clik.
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Re: Submit your EQ Curves

Permanent link to this post Posted by kozikowski » Sun Jun 20, 2010 4:21 pm

Extensible MarkUp Language (XML) is pretty plain and the basic format is used by billions of programmers and developers. All you need is the understanding of information headers, start and stop tags, and data or value tags and you, too can read XML -- and maybe write it, too.

You do have to be careful not to write something for sound that the Real World can't execute -- or that there are unintended results. For example, if you have a sound track with peaks bumping along at 0dB and filter or remove some of the high frequencies, the loudness of the show may go up causing distortion. How is that possible? You took something away and the values of the show peaks went up???

Welcome to the weird world of Fourier.

In the case of the 100Hz filter, that code was produced in Audcity 1.3. I didn't actually write that. I drew the curves manually while looking at the Shure published product curves and then exported the data.

<MyName> Koz </MyName>
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Re: Submit your EQ Curves

Permanent link to this post Posted by kozikowski » Sun Jun 20, 2010 4:21 pm

<<<the ability to delete spam with a single clik.>>>

The senior forum elves would kill to be able to do that.

Koz
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