How Do I Add more RIAA Curves?

Hello,
I’ve got the list of EQ curves for alternative RIAA settings (thanks everyone) but I don’t know how to add them to Audacity.
Can someone explain or point me to where this info is?

I’m using a Scarlett 2i2 to rip my vinyl which has no RIAA curve.

Do you mean Missing features - Audacity Support? The “RIAA” curve is incorrect (deprecated) in that file, as is the “Inverse RIAA” curve. You can use the shipped RIAA curve in Effect > Equalization… in Audacity 2.1.1. If you don’t have 2.1.1, please obtain it here: Audacity ® | Download for Windows.

If you do ever want to add custom EQ curves to Equalization, use the “Save/Manage Curves…” button in the Equalization dialogue, then the “Import…” button. See Audacity Manual.


Gale

Hi Gale,
Thanks for the response. :slight_smile:


Right now I use some RIAA found in the “R” section of my EFFECTS list…It’s not in the EQ (my EQ doesn’t have any default settings)
Unfortunately I have no idea where it came from…I think I found it online somewhere and loaded it a year ago.

I Googled RIAA Curves today and found these…I then pasted them to my desktop QuickFox memo pad.

<curve name="RIAA">
		<point f="20.000000000000" d="19.274000000000"/>
		<point f="25.000000000000" d="18.954000000000"/>
		<point f="31.000000000000" d="18.516000000000"/>
		<point f="40.000000000000" d="17.792000000000"/>
		<point f="50.000000000000" d="16.946000000000"/>
		<point f="63.000000000000" d="15.852000000000"/>
		<point f="80.000000000000" d="14.506000000000"/>
		<point f="100.000000000000" d="13.088000000000"/>
		<point f="125.000000000000" d="11.563000000000"/>
		<point f="160.000000000000" d="9.809000000000"/>
		<point f="200.000000000000" d="8.219000000000"/>
		<point f="250.000000000000" d="6.677000000000"/>
		<point f="315.000000000000" d="5.179000000000"/>
		<point f="400.000000000000" d="3.784000000000"/>
		<point f="500.000000000000" d="2.648000000000"/>
		<point f="630.000000000000" d="1.642000000000"/>
		<point f="800.000000000000" d="0.751000000000"/>
		<point f="1000.000000000000" d="0.000000000000"/>
		<point f="1250.000000000000" d="-0.744000000000"/>
		<point f="1600.000000000000" d="-1.643000000000"/>
		<point f="2000.000000000000" d="-2.589000000000"/>
		<point f="2500.000000000000" d="-3.700000000000"/>
		<point f="3150.000000000000" d="-5.038000000000"/>
		<point f="4000.000000000000" d="-6.605000000000"/>
		<point f="5000.000000000000" d="-8.210000000000"/>
		<point f="6300.000000000000" d="-9.980000000000"/>
		<point f="8000.000000000000" d="-11.894000000000"/>
		<point f="10000.000000000000" d="-13.734000000000"/>
		<point f="12500.000000000000" d="-15.609000000000"/>
		<point f="16000.000000000000" d="-17.708000000000"/>
		<point f="20000.000000000000" d="-19.620000000000"/>
		<point f="25000.000000000000" d="-21.542000000000"/>
		<point f="48000.000000000000" d="-27.187000000000"/>
</curve>

I’m hoping one will be better than what I have now.

Now that I know it goes in the EQ… I still don’t know how to Import these.

I don’t understand why you want to make this complicated. What version of Audacity are you using? Please see the pink panel at the top of the page.

The curve you posted appears to be the same as the one currently shipped with the Equalization effect in Audacity 2.1.1 and many versions before that. So, simply use that curve by opening Equalization and selecting the “RIAA” curve from the “Select Curve:” box.

I answered that in my first reply:

If you have an obsolete Audacity version that does not have the “Save/Manage Curves” feature in Equalization, I recommend you upgrade to 2.1.1: Audacity ® | Download for Windows.


Gale

I’m sorry but I suffer from MS so everything is complicated for me.
Some days I can’t string a sentence together.

And sorry for missing the top…I’m running Windows 10 and have the 2.0.1.0 version of Audacity.

I found the RIAA in the EQ… it was as simple as scrolling up since I made so many custom settings (again MS) :blush:
However, I didn’t even know until now to look there.

I still don’t know how to Import this “” into the EQ :blush:
But I sense you’re agitated so I won’t bother you again.

Oh…I forgot to thank you for your help :blush:

Thanks,Gale!

You don’t import that directly.

The equalizer tool uses XML files to “contain” the instructions and the instructions should be relatively complete. I’m not sure what would happen if you installed a single point instruction.

Steve wrote a voice filter that’s handy for getting rid of rumble and other vocal interference. It’s called LF_rolloff_for_speech.xml

If I open it up in a text editor it looks like this:











I wrote simplified instructions for installing it. This file is normally shipped around as a ZIP file to keep transmission damage to a minimum. Unzip the file to get the xml file that you actually install. If you’re in Windows, you may not see the dot-xml on the end of the filename. Windows insists on hiding it to “help you.”

Adding Audacity Equalization Curves
– Select something on the timeline.
– Effect > Equalization > Save/Manage Curves > Import
– Select LF_rolloff_for_speech.xml > OK. (it won’t open the ZIP. You have to decompress it)
– LF rolloff for speech now appears in the equalization preset curve list.


Let us know if you get stuck.

Koz

Thanks, Koz.
I have the 100Hz Rumble so I assume that’s the Curve you’re talking about.

The XML file to be imported does not absolutely need the at the top and at the bottom. Those tags do no harm, but Audacity will remove them when adding an imported curve to its master curve file called “EQCurves.xml” (which is stored in Audacity’s folder for application data).

The curve does need at the top and at the bottom of the XML file, which Koukol’s RIAA curve does have.

So, Koukol, are you happy now to select the RIAA curve that already comes with Equalization in Audacity 2.0.1? :slight_smile: And do you know now how to import a new curve if you need to?


Gale

Hi Gale.
I found the original RIAA in the EQ which sounds better than the one I downloaded…thanks :slight_smile:
For my taste I still need to boost the treble after though.

However, now that I know where the “EQCurves.xml” is I can’t open it with my free WinRAR so I can’t paste the above curves.(if that’s what I need to do)

On the Computer Audiophile site I found this…
" Audacity has several RIAA equalization variations to choose from:"
In a screen capture it shows quite a few other options like COLUMBIA LP and NAB.
(I’m also now curious about the eRIAA curve)
My 2.1.1.0 version just has one RIAA

What curves exactly do you want to add to Audacity that it does not already have?

The curve you posted at How Do I Add more RIAA Curves? - #3 by Koukol is already in Audacity at “Select Curve:” then choose “RIAA”.

Do you want to make a new RIAA curve of your own with less reduction of treble, then save it as a new curve? If so you can do that in Audacity. We can tell you how to do it, if that is what you want to do.

WinRAR only opens archives that are already compressed, like an XML file inside a ZIP file. EQCurves.xml is not in a ZIP file or other archive, so WinRAR will not open it.

If you want to edit EQCurves.xml directly, you have to open it in a text editor like Notepad, but it is safer to use “Save/Manage Curves…” then “Import…” to import a curve’s XML file. If you make the slightest mistake editing EQCurves.xml in Notepad, then Audacity won’t be able to use it.

Do you already have a different RIAA curve that you want to import into Audacity that you know you like?

I think it is really poor that http://www.computeraudiophile.com/content/486-guide-converting-analog-vinyl-digital-files-using-windows/ implies that those pre-RIAA 78 rpm and early LP curves that were once in Audacity 1.2 are shipped in recent Audacity and then refers to all those curves as “RIAA”. RIAA is merely a specific type of EQ curve, just as NAB and AES are other specific types of EQ curve.

I sent feedback to their webmaster about that and other issues in their article.

Anyway, those other pre-RIAA 78 RPM and early LP curves have to be downloaded from Missing features - Audacity Support. To make things easier for you, I attached the XML file here for you. Do not use WinRAR to open it. Just use “Save / Manage Curves…” then “Import…” to import the attached file.


Gale
EQRecord.xml (10.2 KB)

About four days ago I came across a site that demonstrated 3 or 4 curves so I thought I could add them (or something similar) to Audacity and choose what best works with each recording.

Just to be sure…the RIAA curve in Audacity is a standard for today’s recordings and would be the same in equipment equipped with a RIAA curve (ART USB Phono Plus) and all these other curves are just modified ?

If so… I guess I can modify it myself as you suggested.:slight_smile:

If things are right, the RIAA curve is the only one you need for vinyl.

The older ones are there because before the RIAA curve, there was no standard. When we go back to before vinyl (the 78 rpm era), the curves applied usually had to do with imperfections in recorder and cutter. And since playback devices differed a lot too, everybody was using the tone correction anyway. That was largely a matter of taste, so nobody worried.

IF you’d want to use these older curves correctly, you’d need to know the curve applied when the record was made. Usually, it’s not easy to find that, unless you’re dealing with a well known and famous label.

It’s not all that important anyway, since pre-vinyl recordings will probably need to be equalized anyway.

OK…thanks Cyrano, Gale and Kozikowski!

Hello again.

I just noticed when I apply the RIAA curve in the EQ it reduces the volume.
But when I use the RIAA I uploaded awhile ago the volume doesn’t change as much.
I also noticed both curves reduce the Dynamic Range.
Is this normal?
Do I amplify after applying the RIAA curve from the Equalizer?

The first picture below is the raw vinyl rip, second the EQ’s RIAA applied and the third the other RIAA I have applied.

Because the Equalization effect is boosting some frequencies and reducing others, the overall level may increase or decrease, depending on the curve being applied and the frequency content of the audio being processed. It does not really matter if the overall level is a bit low while you are working on it, but you should adjust the level before you export the finished audio file. If the peak level goes over 0 dB while you are working, it will probably sound distorted because sound cards are not able to reproduce sounds over 0 dB. If that happens, you can use the Amplify effect and amplify by a negative amount to reduce the level.

A good way to set the level before exporting the finished audio file is to use the “Normalize” effect (Audacity Manual). The normalization level should be a little less than 0 dB (for example, -1 dB).

Thanks for the reply, Steve.

When I upload any music into Audacity I usually use Amplify to boost or reduce the signal to 0db. (I think this is the default setting or else I made it the default.) All I have to do is open Amplify and it automatically chooses the db to adjust to achieve 0db.
Would this be the equivalent of the normalizing process you just described?
Should I reset the 0db to -1db?

I’m concerned how the signal looks after I apply the RIAA since it looks nothing like a well recorded CD…it looks like a brick-walled CD.
I’m trying to get the most accurate rips of my vinyl collection.

“Amplify” always defaults to a peak level of 0 dB. That is not a user setting.

“Normalize” allows you to set the peak level. If you set it to 0 dB then it will apply the same amount of amplification as the “Amplify” effect. Personally I prefer to leave a little “head room”, so I “Normalize” to -1 dB.

If you mean that the waveform is flat across the top/bottom, then you may have a problem. Usually a well recorded vinyl album will be more wiggly than a CD.

Thanks again, Steve.
I guess brick-walled was the wrong term now that I get it means clipping.
I was just surprised with the above pics when both RIAA reduced the two original spikes around the 1.16 mark.
I take it the after pics are fine since you haven’t expressed any concern.

The RIAA curve (supplied by us) as expected boosts the bass and reduces the treble. If those spikes after 1 minute 15 seconds were high frequencies, one would expect those spikes to reduce.

I am not so sure that the overall level should go down so much. Normally RIAA would increase the overall level, unless your audio has excessive high frequencies or no bass frequencies.

If you like you can attach a short sample of the audio: How to post an audio sample or select some audio, open Analyze Plot Spectrum… and attach an image of Plot Spectrum.

How are you connecting the turntable to Scarlett exactly?


Gale