EQ curves download

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Revision as of 18:05, 1 June 2016 by Galeandrews (talk | contribs) (Link to 78rpm playback curves and remove links to old 1.2 and NAB curves. Change example of adding a link to plain bullet.)
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Peter 7Mar15: -1 for the gaudy yellow background.
  • Peter 08Mar15: I removed the yellow highlighting on the links, Connie does not ask for this and we don't do this with links anywhere else. I added display text to replace the explicit links.
  • Gale 08Mar15: I can see why the gaudy background was added - the download link is in a random place in each section, making it hard to find. How about adding a bullet point for the download link at the top of each section? I tried that with one of the curve files.
    • Peter -8Mar15: looked good so I adopted the same for the "A-Weighted Curve"
This page serves as a library of additional EQ curves that can be used in the Equalization effect in current Audacity.

Adding the Curves to current Audacity

  1. Right-click over any of the links to curves on this page, choose "Save Target as" or "Save Link As".
    • As more advanced usage, if you left-click the link, some web browsers will display the XML on the web page which you could then copy and paste to a file.
  2. Save the file to any location on your computer. The best location to save to is inside Audacity's folder for application data as follows:
    • Windows Vista and later: Users\<username>\AppData\Roaming\Audacity\
    • Windows XP: Documents and Settings\<username>\Application Data\Audacity
    • OS X: ~/Library/Application Support/audacity/
    • Linux: ~/.audacity-data/ .
  3. Select some audio and choose Effect > Equalization.
  4. Choose "Save/Manage Curves...".
  5. Choose "Import...", select the .xml file you downloaded, then "Open" (if you did not save the file to the above location, you'll need to navigate to the correct location first).
  6. Click "OK".
In order to see Audacity's folder for application data on Windows, Linux or OS X 10.7 and later, you need to show hidden files and folders. See instructions for Windows 7, Windows versions before 7 and OS X 10.7.

Available Curves

Audacity Default Curves

If you are looking for these because you have no curves at all, right-click over the following link Audacity default curves and save to the folder location described above.

If you just want a copy of the defaults, rename this download or you will overwrite any other curves that you currently have.

EQ Curves for old recordings

A number of specialised curves for old recordings can be downloaded from the EQ Curves Library section of our Playback equalization for 78 rpm shellacs and early 33⅓ LPs page. That page also offers tables listing dozens of disc labels with their "turnover bass" and "treble rolloff" values. EQ Curves for Audacity can be generated from those values using the instructions for EQ Curve Generator on that page.

A-Weighted Curve

A-weighting is a commonly used curve defined in the International standard IEC 61672:2003. It was originally developed for measuring low level noise in audio equipment.

Other Curves proposed on the Forum

Browse all the posts in the complete Forum topic Submit your EQ Curves for some other curves for consideration.

Other user suggestions made by email

  • Gale: Curve(s) to compensate for non-flat frequency response in microphones. I suspect impractical, for reasons such as these.

Creating new Curves

All files should be XML that is readable by the "Save/Manage curves..." dialog in Equalization.

  • The first line of the .xml file must be <equalizationeffect> and the last line of the file must be </equalizationeffect>.
  • Each curve must have a first line in the form <curve name="name of curve"> and a last line </curve>.
  • "f" points are the frequency in Hz and "d" points are the gain in dB (a dB value prefixed by "-" means a negative gain, that is a reduction in amplification).

Example .xml file:

   <curve name="default walkie talkie">
      <point f="100.000000000000" d="-20.000000000000"/>
      <point f="125.000000000000" d="-16.000000000000"/>
   <curve name="modern walkie talkie">
      <point f="102.000000000000" d="-15.000000000000"/>
      <point f="130.000000000000" d="2.000000000000"/>

Files should not contain a curve called "unnamed" , but if they do it's not a disaster.

Files can be most easily be created by drawing EQ curves in Equalization, then choose "Save/Manage curves..." in Equalization and use the "Export..." button.

Saving Curves on this page

.xml files can be saved on this Wiki page as follows.

  1. Log in or request a Wiki account here.
  2. Upload the .xml file here.
  3. Type the link to the file so that it looks like this example
    * Download [[Media:A-weighting.xml‎|A-Weighted Curve]]