3.3 GENERALITIES
The frequencies indicated on the interface are relative
and rounded for 44.1 and 48 kHz, if you use 88.2 or
96 kHz, the frequencies will be approximately the
double of the values displayed. And for this reason,
the EQ-C needs a high number of points provided in
the audio correction files in order to ensure greater
accuracy.
3.4 LOADING THE AUDIO
CORRECTION FILES
To load the frequency response data from the audio
correction files into EQ-C, enter the file name without
the extensions "-1.txt" or "-2.txt" and click the Play
"R" button.
Loading the file will automatically invert and normalize
these values in EQ-C, values which could be those of
the measured frequency and phase response curve of
an audio system, so there is no need to manually
invert these values to perform audio correction.
Thus, to create an audio correction file, it suffices to
obtain the points of the frequency and phase
response curve and to specify them in the audio
correction files, with per line, the frequency in Hz, the
sound level in dB, the phase in degree, these values
are separated by a space or a tabulation.
3.5 SAVING THE AUDIO
CORRECTION FILES
Saved equalizations are written for left and right
channels, under the “specifiedFileName-1.txt” and
“specifiedFileName-2.txt”.
If you wish to create a custom equalization, and to
save it, edit the file name in the input box
corresponding and click on the Save button “S”.
WARNING
If another file with the same name already exists
in the EQ-C folder, this would overwrite its
content without notification.
Avoid loading a
detailed response curve file and saving it over, it
would affect the quality by its number of points
,
which are useful when changing of sample-rate, re-
load after changing it.
3.6 CUSTOM AUDIO
CORRECTION FILES
Configuration files use the extension .txt.
For each line, the first term is the frequency value in
Hz, the second is the measured level in dB, the third
is the Phase deviation in degree, and the separator
between each value, is a space or a tab.
There can be as much frequencies as measured, the
audio plugin will convert and import them (min and
max dB values are automatically normalized within
the -18 and +18 dB range available for each EQ
sliders), each EQ's LVL will automatically correct each
channel maximum output peak level.
Sample of frequency response levels and phases
saved for an audio system corrections in the files
“default-1.txt” for the left channel, and “default-2.txt”
for the right channel, at a samplerate of 44.1KHz:
“
31.250000 -0.000000 -0.000000
70.312500 -0.000000 -0.000000
140.625000 -0.000000 -0.000000
281.250000 -0.000000 -0.000000
562.500000 -0.000000 -0.000000
1125.000000 -0.000000 -0.000000
2250.000000 -0.000000 -0.000000
4500.000000 -0.000000 -0.000000
9000.000000 -0.000000 -0.000000
18000.000000 -0.000000 -0.000000
36000.000000 -0.000000 -0.000000
“
WARNING
: There must be frequencies indicated for
the lowest and highest frequencies, for 96 KHz, there
must be at least one line with corresponding values
for the EQ & Phase correction, at 72000 Hz, which is
0.75 times the frequency sample rate, and this dvided
by 2 for the other frequencies until you reach the
highest specified one, else the plugin will see infinite
values if the original values exceed -18 or 18dB.
3.7 INSTALLING THE AUDIO
CORRECTION FILES
The folder EQ-C is located under the user profile or
home directory, Music folder, if not exists it should be
created automatically, otherwise please create a
folder with the name “EQ-C” under your HOME/Music
directory, all ResponseCurve.txt files are located in
this folder.
Install the custom ResponseCurve.txt into the EQ-C
folder under your HOME/Music/EQ-C folder, or on PC
under your C:/users/YourUserName/Music/EQ-C.
While adding configuration files in the EQ-C folder
manually, duplicate if mono, and rename the files with
the “-1” for the left channel and “-2” for the right one.
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Summary of Contents for EQ-C
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