[Audacity-users] question about equalization

[Bob cavanaugh]

Hi all,

I'm not understanding what's going on here. First, the background.

I trade airchecks with someone in Ohio who has 3 different recorders, a
C-Crane, a Sangean, and a Kyato. The few recordings I have made with the
Sangean are too quiet, but otherwise are fine. The C-Crane and the Kyato are
recorded at the same loud volume, imo too loud. Anyway, the Kyato also has
issues with frequency range. Importing a file it creates into Audacity, I
discovered that the 10 kHZ frequency on that recorder is too low, and the 12
and 16 kHZ frequencies are also very low. The C-Crane doesn't have these
issues, so I decided to try and create something similar using the
equalization function in Audacity, so I imported one of the airchecks from
the C-Crane into Audacity, lowered the 20 kHZ frequency only at first, then
added the 16, 12.5, and 10 kHZ frequencies, running equalization several
times to make sure the two sounded as similar as possible. Next, I exported
the file as an MP3, followed by importing it into Audacity again. Then, I
ran the opposite of the equalization I had run to create this file,
expecting to get the original result back, or at least something close, but
that wasn't the case at all. If I run equalization the opposite of what I
did to create the file, shouldn't I get the original result?

Bob

[Dave]

Hi
once you have equalized it then export the result as a MP3 it is done , why go back .
THANKYOU DAVE-211

From: Bob cavanaugh
Sent: Thursday, May 12, 2016 8:49 AM
To: 'Discussion list for Audacity users'
Subject: [Audacity-users] question about equalization

Hi all,

I’m not understanding what’s going on here. First, the background.

I trade airchecks with someone in Ohio who has 3 different recorders, a C-Crane, a Sangean, and a Kyato. The few recordings I have made with the Sangean are too quiet, but otherwise are fine. The C-Crane and the Kyato are recorded at the same loud volume, imo too loud. Anyway, the Kyato also has issues with frequency range. Importing a file it creates into Audacity, I discovered that the 10 kHZ frequency on that recorder is too low, and the 12 and 16 kHZ frequencies are also very low. The C-Crane doesn’t have these issues, so I decided to try and create something similar using the equalization function in Audacity, so I imported one of the airchecks from the C-Crane into Audacity, lowered the 20 kHZ frequency only at first, then added the 16, 12.5, and 10 kHZ frequencies, running equalization several times to make sure the two sounded as similar as possible. Next, I exported the file as an MP3, followed by importing it into Audacity again. Then, I ran the opposite of the equalization I had run to create this file, expecting to get the original result back, or at least something close, but that wasn’t the case at all. If I run equalization the opposite of what I did to create the file, shouldn’t I get the original result?

Bob



--------------------------------------------------------------------------------
------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j


--------------------------------------------------------------------------------
*********** ASKING FOR HELP *************

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[Bob cavanaugh]

I was trying to go back to see if I could use the results on the other recording.



From: Dave [mailto:***@bigpond.net.au]
Sent: Thursday, May 12, 2016 5:17 AM
To: Discussion list for Audacity users <audacity-***@lists.sourceforge.net>
Subject: Re: [Audacity-users] question about equalization



Hi

once you have equalized it then export the result as a MP3 it is done , why go back .

THANKYOU DAVE-211



From: Bob cavanaugh <mailto:***@comcast.net>

Sent: Thursday, May 12, 2016 8:49 AM

To: 'Discussion list for Audacity users' <mailto:audacity-***@lists.sourceforge.net>

Subject: [Audacity-users] question about equalization



Hi all,

I’m not understanding what’s going on here. First, the background.

I trade airchecks with someone in Ohio who has 3 different recorders, a C-Crane, a Sangean, and a Kyato. The few recordings I have made with the Sangean are too quiet, but otherwise are fine. The C-Crane and the Kyato are recorded at the same loud volume, imo too loud. Anyway, the Kyato also has issues with frequency range. Importing a file it creates into Audacity, I discovered that the 10 kHZ frequency on that recorder is too low, and the 12 and 16 kHZ frequencies are also very low. The C-Crane doesn’t have these issues, so I decided to try and create something similar using the equalization function in Audacity, so I imported one of the airchecks from the C-Crane into Audacity, lowered the 20 kHZ frequency only at first, then added the 16, 12.5, and 10 kHZ frequencies, running equalization several times to make sure the two sounded as similar as possible. Next, I exported the file as an MP3, followed by importing it into Audacity again. Then, I ran the opposite of the equalization I had run to create this file, expecting to get the original result back, or at least something close, but that wasn’t the case at all. If I run equalization the opposite of what I did to create the file, shouldn’t I get the original result?

Bob

_____

------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j

_____

*********** ASKING FOR HELP *************

When asking for help on this list, please include the following information, so we can
help you properly:

* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)

* Exactly what three digit version number of Audacity you are using (Help > About
Audacity, or Audacity > About Audacity on a Mac computer)

* If this is a recording problem, what equipment you are recording with, and how is it
connected to the computer?

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To UNSUBSCRIBE, use the form at the bottom of this web page:
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[Dave]

Hi
to do that you would have to use the undo that you did the mp3 with.
THANKYOU DAVE-211


From: Bob cavanaugh
Sent: Thursday, May 12, 2016 8:49 AM
To: 'Discussion list for Audacity users'
Subject: [Audacity-users] question about equalization

Hi all,

I’m not understanding what’s going on here. First, the background.

I trade airchecks with someone in Ohio who has 3 different recorders, a C-Crane, a Sangean, and a Kyato. The few recordings I have made with the Sangean are too quiet, but otherwise are fine. The C-Crane and the Kyato are recorded at the same loud volume, imo too loud. Anyway, the Kyato also has issues with frequency range. Importing a file it creates into Audacity, I discovered that the 10 kHZ frequency on that recorder is too low, and the 12 and 16 kHZ frequencies are also very low. The C-Crane doesn’t have these issues, so I decided to try and create something similar using the equalization function in Audacity, so I imported one of the airchecks from the C-Crane into Audacity, lowered the 20 kHZ frequency only at first, then added the 16, 12.5, and 10 kHZ frequencies, running equalization several times to make sure the two sounded as similar as possible. Next, I exported the file as an MP3, followed by importing it into Audacity again. Then, I ran the opposite of the equalization I had run to create this file, expecting to get the original result back, or at least something close, but that wasn’t the case at all. If I run equalization the opposite of what I did to create the file, shouldn’t I get the original result?

Bob



--------------------------------------------------------------------------------
------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j


--------------------------------------------------------------------------------
*********** ASKING FOR HELP *************

When asking for help on this list, please include the following information, so we can
help you properly:

* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)

* Exactly what three digit version number of Audacity you are using (Help > About
Audacity, or Audacity > About Audacity on a Mac computer)

* If this is a recording problem, what equipment you are recording with, and how is it
connected to the computer?

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To UNSUBSCRIBE, use the form at the bottom of this web page:
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[Bob cavanaugh]

I’m not sure you’re understanding the situation. The one recorder that I’m satisfied with was being used as a test to see if I could improve the sound of the other recorder, which at this point seems cannot be done. The question is, shouldn’t it be possible at least in theory, possible to undo those changes by running the opposite effect? For example, if you adjusted the 20 kHZ frequency by -20 DB, shouldn’t you be able to get most of that quality lost back by bringing it up by the same amount?



From: Dave [mailto:***@bigpond.net.au]
Sent: Friday, May 13, 2016 5:21 AM
To: Discussion list for Audacity users <audacity-***@lists.sourceforge.net>
Subject: Re: [Audacity-users] question about equalization



Hi

to do that you would have to use the undo that you did the mp3 with.

THANKYOU DAVE-211





From: Bob cavanaugh <mailto:***@comcast.net>

Sent: Thursday, May 12, 2016 8:49 AM

To: 'Discussion list for Audacity users' <mailto:audacity-***@lists.sourceforge.net>

Subject: [Audacity-users] question about equalization



Hi all,

I’m not understanding what’s going on here. First, the background.

I trade airchecks with someone in Ohio who has 3 different recorders, a C-Crane, a Sangean, and a Kyato. The few recordings I have made with the Sangean are too quiet, but otherwise are fine. The C-Crane and the Kyato are recorded at the same loud volume, imo too loud. Anyway, the Kyato also has issues with frequency range. Importing a file it creates into Audacity, I discovered that the 10 kHZ frequency on that recorder is too low, and the 12 and 16 kHZ frequencies are also very low. The C-Crane doesn’t have these issues, so I decided to try and create something similar using the equalization function in Audacity, so I imported one of the airchecks from the C-Crane into Audacity, lowered the 20 kHZ frequency only at first, then added the 16, 12.5, and 10 kHZ frequencies, running equalization several times to make sure the two sounded as similar as possible. Next, I exported the file as an MP3, followed by importing it into Audacity again. Then, I ran the opposite of the equalization I had run to create this file, expecting to get the original result back, or at least something close, but that wasn’t the case at all. If I run equalization the opposite of what I did to create the file, shouldn’t I get the original result?

Bob

_____

------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j

_____

*********** ASKING FOR HELP *************

When asking for help on this list, please include the following information, so we can
help you properly:

* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)

* Exactly what three digit version number of Audacity you are using (Help > About
Audacity, or Audacity > About Audacity on a Mac computer)

* If this is a recording problem, what equipment you are recording with, and how is it
connected to the computer?

Mailing list: Audacity-***@lists.sourceforge.net <mailto:Audacity-***@lists.sourceforge.net>
To UNSUBSCRIBE, use the form at the bottom of this web page:
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[Allistair Bywater]

Bob, I think it might not work because the effects are being done
digitally - if it were analogue, I suspect it would work to a greater
extent. But I can't say for sure.

Good luck anyway.

Allistair

I’m not sure you’re understanding the situation. The one recorder that
I’m satisfied with was being used as a test to see if I could improve
the sound of the other recorder, which at this point seems cannot be
done. The question is, shouldn’t it be possible at least in theory,
possible to undo those changes by running the opposite effect? For
example, if you adjusted the 20 kHZ frequency by -20 DB, shouldn’t you
be able to get most of that quality lost back by bringing it up by the
same amount?
*Sent:* Friday, May 13, 2016 5:21 AM
*To:* Discussion list for Audacity users
*Subject:* Re: [Audacity-users] question about equalization
Hi
to do that you would have to use the undo that you did the mp3 with.
THANKYOU DAVE-211
*Sent:*Thursday, May 12, 2016 8:49 AM
*To:*'Discussion list for Audacity users'
*Subject:*[Audacity-users] question about equalization
Hi all,
I’m not understanding what’s going on here. First, the background.
I trade airchecks with someone in Ohio who has 3 different recorders,
a C-Crane, a Sangean, and a Kyato. The few recordings I have made with
the Sangean are too quiet, but otherwise are fine. The C-Crane and the
Kyato are recorded at the same loud volume, imo too loud. Anyway, the
Kyato also has issues with frequency range. Importing a file it
creates into Audacity, I discovered that the 10 kHZ frequency on that
recorder is too low, and the 12 and 16 kHZ frequencies are also very
low. The C-Crane doesn’t have these issues, so I decided to try and
create something similar using the equalization function in Audacity,
so I imported one of the airchecks from the C-Crane into Audacity,
lowered the 20 kHZ frequency only at first, then added the 16, 12.5,
and 10 kHZ frequencies, running equalization several times to make
sure the two sounded as similar as possible. Next, I exported the file
as an MP3, followed by importing it into Audacity again. Then, I ran
the opposite of the equalization I had run to create this file,
expecting to get the original result back, or at least something
close, but that wasn’t the case at all. If I run equalization the
opposite of what I did to create the file, shouldn’t I get the
original result?
Bob
------------------------------------------------------------------------
------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
------------------------------------------------------------------------
*********** ASKING FOR HELP *************
When asking for help on this list, please include the following information, so we can
* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)
* Exactly what three digit version number of Audacity you are using (Help > About
Audacity, or Audacity > About Audacity on a Mac computer)
* If this is a recording problem, what equipment you are recording with, and how is it
connected to the computer?
https://lists.sourceforge.net/lists/listinfo/audacity-users
------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
*********** ASKING FOR HELP *************
When asking for help on this list, please include the following information, so we can
* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)
* Exactly what three digit version number of Audacity you are using (Help > About
Audacity, or Audacity > About Audacity on a Mac computer)
* If this is a recording problem, what equipment you are recording with, and how is it
connected to the computer?
https://lists.sourceforge.net/lists/listinfo/audacity-users

[Johnny Rosenberg]

Post by Allistair Bywater
Bob, I think it might not work because the effects are being done
digitally - if it were analogue, I suspect it would work to a greater
extent. But I can't say for sure.

I strongly doubt that. You still have phase issues and you also have noise
issues on top of that. Maybe the increased noise will mask the phase issues
a bit though



Kind regards

Johnny Rosenberg

Good luck anyway.

Post by Allistair Bywater
Allistair
I’m not sure you’re understanding the situation. The one recorder that I’m
satisfied with was being used as a test to see if I could improve the sound
of the other recorder, which at this point seems cannot be done. The
question is, shouldn’t it be possible at least in theory, possible to undo
those changes by running the opposite effect? For example, if you adjusted
the 20 kHZ frequency by -20 DB, shouldn’t you be able to get most of that
quality lost back by bringing it up by the same amount?
*Sent:* Friday, May 13, 2016 5:21 AM
*To:* Discussion list for Audacity users
*Subject:* Re: [Audacity-users] question about equalization
Hi
to do that you would have to use the undo that you did the mp3 with.
THANKYOU DAVE-211
*Sent:* Thursday, May 12, 2016 8:49 AM
*To:* 'Discussion list for Audacity users'
*Subject:* [Audacity-users] question about equalization
Hi all,
I’m not understanding what’s going on here. First, the background.
I trade airchecks with someone in Ohio who has 3 different recorders, a
C-Crane, a Sangean, and a Kyato. The few recordings I have made with the
Sangean are too quiet, but otherwise are fine. The C-Crane and the Kyato
are recorded at the same loud volume, imo too loud. Anyway, the Kyato also
has issues with frequency range. Importing a file it creates into Audacity,
I discovered that the 10 kHZ frequency on that recorder is too low, and the
12 and 16 kHZ frequencies are also very low. The C-Crane doesn’t have these
issues, so I decided to try and create something similar using the
equalization function in Audacity, so I imported one of the airchecks from
the C-Crane into Audacity, lowered the 20 kHZ frequency only at first, then
added the 16, 12.5, and 10 kHZ frequencies, running equalization several
times to make sure the two sounded as similar as possible. Next, I exported
the file as an MP3, followed by importing it into Audacity again. Then, I
ran the opposite of the equalization I had run to create this file,
expecting to get the original result back, or at least something close, but
that wasn’t the case at all. If I run equalization the opposite of what I
did to create the file, shouldn’t I get the original result?
Bob
------------------------------
------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
------------------------------
*********** ASKING FOR HELP *************
When asking for help on this list, please include the following information, so we can
* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)
* Exactly what three digit version number of Audacity you are using (Help

About

Audacity, or Audacity > About Audacity on a Mac computer)
* If this is a recording problem, what equipment you are recording with, and how is it
connected to the computer?
https://lists.sourceforge.net/lists/listinfo/audacity-users
------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
*********** ASKING FOR HELP *************
When asking for help on this list, please include the following information, so we can
* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)
* Exactly what three digit version number of Audacity you are using (Help > About
Audacity, or Audacity > About Audacity on a Mac computer)
* If this is a recording problem, what equipment you are recording with, and how is it
connected to the computer?
To UNSUBSCRIBE, use the form at the bottom of this web page:https://lists.sourceforge.net/lists/listinfo/audacity-users
------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
*********** ASKING FOR HELP *************
When asking for help on this list, please include the following information, so we can
* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)
* Exactly what three digit version number of Audacity you are using (Help

About

Audacity, or Audacity > About Audacity on a Mac computer)
* If this is a recording problem, what equipment you are recording with, and how is it
connected to the computer?
https://lists.sourceforge.net/lists/listinfo/audacity-users

[Johnny Rosenberg]

Post by Bob cavanaugh
I’m not sure you’re understanding the situation. The one recorder that I’m
satisfied with was being used as a test to see if I could improve the sound
of the other recorder, which at this point seems cannot be done. The
question is, shouldn’t it be possible at least in theory, possible to undo
those changes by running the opposite effect? For example, if you adjusted
the 20 kHZ frequency by -20 DB, shouldn’t you be able to get most of that
quality lost back by bringing it up by the same amount?

I'm not an expert on filters and EQ stuff, and I'm sure there are a few
different algorithms to use for this with different side effects and so on,
but generally speaking, more than just attenuating or amplifying different
frequencies happens when applying an EQ effect on something. For instance
there are phase issues, and I don't think they are reversed by applying an
EQ twice even though you adjusted by -20 dB first time and +20 dB next time.

And saving as mp3 and using that as a new original is never a good idea.
Always use non destructive formats, such as flac, for editing. Things like
mp3 are for the end product only.


Kind regards

Johnny Rosenberg

Post by Bob cavanaugh
*Sent:* Friday, May 13, 2016 5:21 AM
*To:* Discussion list for Audacity users <
*Subject:* Re: [Audacity-users] question about equalization
Hi
to do that you would have to use the undo that you did the mp3 with.
THANKYOU DAVE-211
*Sent:* Thursday, May 12, 2016 8:49 AM
*To:* 'Discussion list for Audacity users'
*Subject:* [Audacity-users] question about equalization
Hi all,
I’m not understanding what’s going on here. First, the background.
I trade airchecks with someone in Ohio who has 3 different recorders, a
C-Crane, a Sangean, and a Kyato. The few recordings I have made with the
Sangean are too quiet, but otherwise are fine. The C-Crane and the Kyato
are recorded at the same loud volume, imo too loud. Anyway, the Kyato also
has issues with frequency range. Importing a file it creates into Audacity,
I discovered that the 10 kHZ frequency on that recorder is too low, and the
12 and 16 kHZ frequencies are also very low. The C-Crane doesn’t have these
issues, so I decided to try and create something similar using the
equalization function in Audacity, so I imported one of the airchecks from
the C-Crane into Audacity, lowered the 20 kHZ frequency only at first, then
added the 16, 12.5, and 10 kHZ frequencies, running equalization several
times to make sure the two sounded as similar as possible. Next, I exported
the file as an MP3, followed by importing it into Audacity again. Then, I
ran the opposite of the equalization I had run to create this file,
expecting to get the original result back, or at least something close, but
that wasn’t the case at all. If I run equalization the opposite of what I
did to create the file, shouldn’t I get the original result?
Bob
------------------------------
------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
------------------------------
*********** ASKING FOR HELP *************
When asking for help on this list, please include the following information, so we can
* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)
* Exactly what three digit version number of Audacity you are using (Help

About

Audacity, or Audacity > About Audacity on a Mac computer)
* If this is a recording problem, what equipment you are recording with, and how is it
connected to the computer?
https://lists.sourceforge.net/lists/listinfo/audacity-users
------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
*********** ASKING FOR HELP *************
When asking for help on this list, please include the following information, so we can
* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)
* Exactly what three digit version number of Audacity you are using (Help

About

Audacity, or Audacity > About Audacity on a Mac computer)
* If this is a recording problem, what equipment you are recording with, and how is it
connected to the computer?
https://lists.sourceforge.net/lists/listinfo/audacity-users

[Johnny Rosenberg]

Post by Bob cavanaugh
Hi all,
I’m not understanding what’s going on here. First, the background.
I trade airchecks with someone in Ohio who has 3 different recorders, a
C-Crane, a Sangean, and a Kyato. The few recordings I have made with the
Sangean are too quiet, but otherwise are fine. The C-Crane and the Kyato
are recorded at the same loud volume, imo too loud.

What do you mean by ”too loud”? Are there clipping issues? The louder, the
better, as long as clipping doesn't occur. Just lower the volume when
playing back if it is ”too loud”.

Post by Bob cavanaugh
Anyway, the Kyato also has issues with frequency range. Importing a file
it creates into Audacity, I discovered that the 10 kHZ frequency on that
recorder is too low, and the 12 and 16 kHZ frequencies are also very low.

What sampling rate was used in this case?

Post by Bob cavanaugh
The C-Crane doesn’t have these issues, so I decided to try and create
something similar using the equalization function in Audacity, so I
imported one of the airchecks from the C-Crane into Audacity, lowered the
20 kHZ frequency only at first, then added the 16, 12.5, and 10 kHZ
frequencies, running equalization several times to make sure the two
sounded as similar as possible.

Sorry, yo ulost me there. I thought it was the Kyato files that had
frequency issues, so why amplify those frequencies to the C-Crane files
that didn't have such issues in the first place?

Post by Bob cavanaugh
Next, I exported the file as an MP3, followed by importing it into
Audacity again.

Never do that. Just don't. Use flac or similar if your plan is to get it
back for editing.

Post by Bob cavanaugh
Then, I ran the opposite of the equalization I had run to create this
file, expecting to get the original result back, or at least something
close, but that wasn't the case at all. If I run equalization the opposite
of what I did to create the file, shouldn’t I get the original result?

Depends. As I already said in another reply, other things than just
amplifying or attenuating frequencies happens when applying an EQ. Also, if
you first amplified some frequencies to a signal that was already ”too
loud”, I would expect clipping to occur, and once the clipping occur, the
signal can not be restored in other ways than undoing the step that caused
the clipping.


Kind regards

Johnny Rosenberg

Post by Bob cavanaugh
Bob
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[Bob cavanaugh]

Hi Johnny,

First off, there’s no clipping in either C-Crane or Kyato, but I have to turn my playback volume down to 25% when playing those, where other files are at 50% volume and sound perfect. Good point about the sample rate, what’s the easiest way to check? As for editing the levels on the C-Crane, I did that because, if the file had returned to its original quality as I thought it would, I would have run the same equalization on the files from the Kyato.



From: Johnny Rosenberg [mailto:***@gmail.com]
Sent: Friday, May 13, 2016 1:56 PM
To: Discussion list for Audacity users <audacity-***@lists.sourceforge.net>
Subject: Re: [Audacity-users] question about equalization



2016-05-12 0:49 GMT+02:00 Bob cavanaugh <***@comcast.net <mailto:***@comcast.net> >:

Hi all,

I’m not understanding what’s going on here. First, the background.

I trade airchecks with someone in Ohio who has 3 different recorders, a C-Crane, a Sangean, and a Kyato. The few recordings I have made with the Sangean are too quiet, but otherwise are fine. The C-Crane and the Kyato are recorded at the same loud volume, imo too loud.



What do you mean by ”too loud”? Are there clipping issues? The louder, the better, as long as clipping doesn't occur. Just lower the volume when playing back if it is ”too loud”.



Anyway, the Kyato also has issues with frequency range. Importing a file it creates into Audacity, I discovered that the 10 kHZ frequency on that recorder is too low, and the 12 and 16 kHZ frequencies are also very low.



What sampling rate was used in this case?



The C-Crane doesn’t have these issues, so I decided to try and create something similar using the equalization function in Audacity, so I imported one of the airchecks from the C-Crane into Audacity, lowered the 20 kHZ frequency only at first, then added the 16, 12.5, and 10 kHZ frequencies, running equalization several times to make sure the two sounded as similar as possible.



Sorry, yo ulost me there. I thought it was the Kyato files that had frequency issues, so why amplify those frequencies to the C-Crane files that didn't have such issues in the first place?



Next, I exported the file as an MP3, followed by importing it into Audacity again.



Never do that. Just don't. Use flac or similar if your plan is to get it back for editing.



Then, I ran the opposite of the equalization I had run to create this file, expecting to get the original result back, or at least something close, but that wasn't the case at all. If I run equalization the opposite of what I did to create the file, shouldn’t I get the original result?



Depends. As I already said in another reply, other things than just amplifying or attenuating frequencies happens when applying an EQ. Also, if you first amplified some frequencies to a signal that was already ”too loud”, I would expect clipping to occur, and once the clipping occur, the signal can not be restored in other ways than undoing the step that caused the clipping.





Kind regards



Johnny Rosenberg





Bob


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[Johnny Rosenberg]

Post by Bob cavanaugh
Hi Johnny,
First off, there’s no clipping in either C-Crane or Kyato, but I have to
turn my playback volume down to 25% when playing those, where other files
are at 50% volume and sound perfect. Good point about the sample rate,
what’s the easiest way to check?

I don't know what's easiest, but I use soxi (or sox --i) for that kind of
stuff:
soxi <FileName>
or
sox --i <FileName>

Examples ($ indicates the prompt in this case, so don't input that
):
$ sox --i "04. Black Sand Beach (ブラック・サンド・ビヌチ).flac"

Input File : '04. Black Sand Beach (ブラック・サンド・ビヌチ).flac'
Channels : 2
Sample Rate : 44100
Precision : 16-bit
Duration : 00:02:29.87 = 6609120 samples = 11240 CDDA sectors
File Size : 16.0M
Bit Rate : 852k
Sample Encoding: 16-bit FLAC
Comments :
TITLE=Black Sand Beach
TITLE=ブラック・サンド・ビヌチ
TITLE=Showdown At Newport
ARTIST=The Ventures
ALBUM=60ÂŽs pop
DATE=1981
COMPOSER=Yūzō Kayama
PERFORMER=Yūzō Kayama
GENRE=Instrumental rock
DISCNUMBER=1
TRACKNUMBER=04
TRACKTOTAL=12
ENCODED-BY=Sound Juicer 2.31.6

$

For only the Sample rate line, just filter it out with grep:
$ sox --i "04. Black Sand Beach (ブラック・サンド・ビヌチ).flac" | grep "Sample Rate"
Sample Rate : 44100
$

Or even:
$ sox --i "04. Black Sand Beach (ブラック・サンド・ビヌチ).flac" | grep "Sample Rate" |
awk -F ':' '{print $2}' | sed -r 's/ ([0-9]+)/\1 Hz/'
44100 Hz
$
You would probably want to make a function for the last one and put it in
your .bashrc or similar:
function SR () {
sox --i "$1" | grep "Sample Rate" | awk -F ':' '{print $2}' | sed -r 's/
([0-9]+)/\1 Hz/'
}

$ SR "04. Black Sand Beach (ブラック・サンド・ビヌチ).flac"
44100 Hz
$


For this to work you obviously need Sox and, in the second example, grep,
which is standard in most shells for Linux and Unix anyway.

But easiest way? I'm not sure. Right click the file → Properties → Audio,
maybe? Works in Nautilus at least. I did not test this in any other file
managers though.



Kind regards

Johnny Rosenberg

Post by Bob cavanaugh
As for editing the levels on the C-Crane, I did that because, if the file
had returned to its original quality as I thought it would, I would have
run the same equalization on the files from the Kyato.
*Sent:* Friday, May 13, 2016 1:56 PM
*To:* Discussion list for Audacity users <
*Subject:* Re: [Audacity-users] question about equalization
Hi all,
I’m not understanding what’s going on here. First, the background.
I trade airchecks with someone in Ohio who has 3 different recorders, a
C-Crane, a Sangean, and a Kyato. The few recordings I have made with the
Sangean are too quiet, but otherwise are fine. The C-Crane and the Kyato
are recorded at the same loud volume, imo too loud.
What do you mean by ”too loud”? Are there clipping issues? The louder, the
better, as long as clipping doesn't occur. Just lower the volume when
playing back if it is ”too loud”.
Anyway, the Kyato also has issues with frequency range. Importing a file
it creates into Audacity, I discovered that the 10 kHZ frequency on that
recorder is too low, and the 12 and 16 kHZ frequencies are also very low.
What sampling rate was used in this case?
The C-Crane doesn’t have these issues, so I decided to try and create
something similar using the equalization function in Audacity, so I
imported one of the airchecks from the C-Crane into Audacity, lowered the
20 kHZ frequency only at first, then added the 16, 12.5, and 10 kHZ
frequencies, running equalization several times to make sure the two
sounded as similar as possible.
Sorry, yo ulost me there. I thought it was the Kyato files that had
frequency issues, so why amplify those frequencies to the C-Crane files
that didn't have such issues in the first place?
Next, I exported the file as an MP3, followed by importing it into Audacity again.
Never do that. Just don't. Use flac or similar if your plan is to get it back for editing.
Then, I ran the opposite of the equalization I had run to create this
file, expecting to get the original result back, or at least something
close, but that wasn't the case at all. If I run equalization the opposite
of what I did to create the file, shouldn’t I get the original result?
Depends. As I already said in another reply, other things than just
amplifying or attenuating frequencies happens when applying an EQ. Also, if
you first amplified some frequencies to a signal that was already ”too
loud”, I would expect clipping to occur, and once the clipping occur, the
signal can not be restored in other ways than undoing the step that caused
the clipping.
Kind regards
Johnny Rosenberg
Bob
------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
*********** ASKING FOR HELP *************
When asking for help on this list, please include the following information, so we can
* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)
* Exactly what three digit version number of Audacity you are using (Help

About

Audacity, or Audacity > About Audacity on a Mac computer)
* If this is a recording problem, what equipment you are recording with, and how is it
connected to the computer?
https://lists.sourceforge.net/lists/listinfo/audacity-users
------------------------------------------------------------------------------
Mobile security can be enabling, not merely restricting. Employees who
bring their own devices (BYOD) to work are irked by the imposition of MDM
restrictions. Mobile Device Manager Plus allows you to control only the
apps on BYO-devices by containerizing them, leaving personal data untouched!
https://ad.doubleclick.net/ddm/clk/304595813;131938128;j
*********** ASKING FOR HELP *************
When asking for help on this list, please include the following information, so we can
* What operating system you are using (for example, Windows XP or Mac OS X 10.5.1)
* Exactly what three digit version number of Audacity you are using (Help

About

Audacity, or Audacity > About Audacity on a Mac computer)
* If this is a recording problem, what equipment you are recording with, and how is it
connected to the computer?
https://lists.sourceforge.net/lists/listinfo/audacity-users