Submit your EQ Curves

Special Interest Groups Audio Processing
122

I posted it so people could use it in Audacity, obviously. See:
Submit your EQ Curves - #7 by Gale_Andrews .

I assumed someone interested would create XML files from the information given, but it seems no-one was interested, or did not share the files.

As I explained, the entries in the FEQ files are for the following 18 frequencies in Hz:

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

Here for example is “Metal.FEQ”. This contains the following 18 gain values (amounts by which the frequency will be increased or reduced) for each of the 18 frequencies above:

4
5
5
3
0
-1
-2
-1
0
1
1
1
1
0
-1
-1
-1
-1

So, open Effect > Equalization. Find 55 Hz (the first frequency) in the Equalization graph. Then find the first gain value in “Metal.FEQ”. That first value is “4”. So increase the 55 Hz frequency by 4 dB in Equalization. Repeat for the other 17 values. If the gain value is 0, there is no need to create a point on the graph. If the gain value is negative (for example, -1), reduce the gain for that frequency by that amount.

Alternatively (more accurately), create an XML file using the values above. Then import it into Equalization using “Save/Manage Curves…”, then “Import…”.

This is an example of correct syntax of an XML EQ file that Audacity will be able to import:

    <equalizationeffect>
       <curve name="new default walkie talkie curve">
          <point f="100.000000000000" d="-20.000000000000"/>
          <point f="125.000000000000" d="-16.000000000000"/>
       </curve>
    </equalizationeffect>

“f” is the frequency (the first set of code in this message) and “d” is the gain amount (the second set of code).


Gale