Log in
Log in

or
Learning
2 comments

The Match Game

How to use a match EQ to manipulate your audio

A Match EQ is a specialized type of equalizer plug-in that works by extracting the EQ profile from one audio file and applying it to another, so that the latter sounds more like the former. This type of EQ can be used both in corrective and creative ways, as you’ll see if you read on.

Match me, please

Match EQs are not all that common. Apple Logic Pro X (and earlier versions) comes with one, axisplugins makes Match EQ, and the TC Konnekt system has a plug-in called Assimilator.  The Nugen Audio SEQ-S, and FabFilter Pro Q 2 have match EQ features, A couple of iZotope applications Ozone 6 and Ozone 6 Advanced, and RX 4 and RX 4 Advanced also feature them. There are probably others, but those are the only ones I could find. I personally have experience with the Logic Pro, Ozone and RX match EQs.

 
 
iZotope Ozone 6 has a match EQ feature inside its Equalizer module

Although the controls of different products can vary somewhat, the basic way you use a match EQ is as follows. First, you open it up on the source file, that is the audio that you want to match. There’s typically a “Learn” button, which samples the EQ profile of the source) usually a second one to learn the target audio’s unprocessed profile. With both profiles captured, the EQ can calculate how to make the target’s EQ curve match that of the source.

On some match EQ’s you’ll find a color-coded spectrum analyzer display simultaneously showing the source and target EQ curves, and on some, the match curve, as well. Usually there’s a slider that lets you choose what percentage of the source profile you want to apply on the target, and on some EQs, such as the one on Ozone 6 (which is part of its regular EQ module). The next step is usually to set the parameters and then hit the Match or Process button that initiates the actual matching. You can then experiment with the settings until you get what you want. Many match EQs have a “smoothing” feature, which smoothes out the EQ curve used for the match, sometimes helping the matched file blend in better with the source.

On the corrective side of things, a match EQ comes in handy when you have to two pieces of audio that need to sound like they were recorded on the same mic, but actually weren’t. Or an acoustic guitar part where on one of the overdubs, the player accidentally moved a little from the original mic position, and now you’re mixing and there’s a sonic discrepancy.

A match EQ is not going to perform miracles, because it’s dealing with the EQ profile of the sound, not its basic sonic character. It’s not going to make a tuba sound like a banjo, but it might make recordings of two different banjo’s sound like the same one. When you have a small but obvious difference between sounds, it can save your butt. Match EQs are also very useful for video work, because you can use them to more closely match voices recorded through camera mics with that of voices added in post production.

 
 
Like other match EQs, Logic Pro X's version can learn the EQ profile of an entire mix and copy it onto another

Some match EQ’s such as the one in Logic Pro or Nugen Audio’s SEQ-S, let you invert the matching curve, which can be useful when trying to carve out space in a mix. Here’s how that works: Say you’re mixing and the electric rhythm guitar part is getting in the way of the piano part. You’d use the match EQ to learn the profile of the piano, and then you’d invert the profile and apply some percentage of it to the rhythm guitar. By doing that, it will be reducing the frequencies of the guitar that are in the same range as the piano, making both fit together better.

Matching with the stars

The really fun part of a match EQ however, is to use it as a creative tool. One of the coolest ways to do that is to find a song from a CD that’s similar to yours in style and instrumentation, with an overall sound to it that you like (better a CD than an MP3, or other compressed format, for the sake of fidelity). Use the matching EQ to learn its EQ profile, and then apply that to your mix. You’ll be surprised how much of an improvement, or at least a change, you can make by doing that. You could also take the EQ profile of a wholly different type of song and apply it, which might give you interesting results, or might sound really bad. There’s room for experimentation.

Perfect match

As you can see, a match EQ is a unique processor that can be quite useful. Depending on the EQ, it can take a while to learn how to use it to its fullest potential, so be patient with it. Make sure to read the manual so you know what each control is for, and how it impacts the eventual result. Happy matching!

Watch this video for examples of a match EQ in action

 

  • ericbailey 7 posts
    ericbailey
    New AFfiliate
    Posted on 12/11/2014 at 05:57:47
    Very cool. I have Assimilator via TC Konnekt but never use it as I heard these plug-ins weren't great, but now I'm considering giving it a try. A couple of questions:
    [*]In your examples, when you're saying this is with match 'on' the comparing it when turned 'off', you're strictly talking about matching EQ, correct? That is to say, when the matching is 'of', the guitar track still has EQ, thus we can say the difference in town with Match EQ on vs off is ENTIRELY due to the match EQ, leaving all other plug-ins activated?[newline][*]I can see the benefit on the EQ curve for a whole mix, but what if I hear a guitar part I LOVE within a song? Is there any simple way where I can match the EQ curve of ONLY the guitar track on a CD/mp3 song?[newline]
    Sorry if those questions sound confusing, but hopefully you understand what I'm trying to say :D:
  • Mike Levine 1066 posts
    Mike Levine
    Author
    Posted on 12/12/2014 at 06:04:08
    Quote:
    [*]In your examples, when you're saying this is with match 'on' the comparing it when turned 'off', you're strictly talking about matching EQ, correct? That is to say, when the matching is 'of', the guitar track still has EQ, thus we can say the difference in town with Match EQ on vs off is ENTIRELY due to the match EQ, leaving all other plug-ins activated?
    Yes, because everything else about the sound is the same. In the example I gave on the video, the only changes between the two sounds in the comparison was that the match EQ was either on or off. All else remained the same.

    Quote:
    [*]I can see the benefit on the EQ curve for a whole mix, but what if I hear a guitar part I LOVE within a song? Is there any simple way where I can match the EQ curve of ONLY the guitar track on a CD/mp3 song?
    Unless there was a section where the guitar you like was playing by itself during the song, you wouldn't be able to isolate it enough for a match EQ to effectively learn its frequency spectrum.

Would you like to comment this article?

Log in
Become a member
cookies
We are using cookies!

Yes, Audiofanzine is using cookies. Since the last thing that we want is disturbing your diet with too much fat or too much sugar, you'll be glad to learn that we made them ourselves with fresh, organic and fair ingredients, and with a perfect nutritional balance. What this means is that the data we store in them is used to enhance your use of our website as well as improve your user experience on our pages and show you personalised ads (learn more). To configure your cookie preferences, click here.

We did not wait for a law to make us respect our members and visitors' privacy. The cookies that we use are only meant to improve your experience on our website.

Our cookies
Cookies not subject to consent
These are cookies that guarantee the proper functioning of Audiofanzine and allow its optimization. The website cannot function properly without these cookies. Example: cookies that help you stay logged in from page to page or that help customizing your usage of the website (dark mode or filters).
Audience analysis (Google Analytics)
We are using Google Analytics in order to better understand the use that our visitors make of our website in an attempt to improve it.
Advertising (Google Ads)
This information allows us to show you personalized advertisements thanks to which Audiofanzine is financed. By unchecking this box you will still have advertisements but they may be less interesting :) We are using Google Ad Manager to display part of our ads, or tools integrated to our own CMS for the rest. We are likely to display advertisements from our own platform, from Google Advertising Products or from Adform.
Marketing (Meta Pixel)

On our websites, we use the Meta Pixel. The Meta Pixel is a remarketing pixel implemented on our websites that allows us to target you directly via the Meta Network by serving ads to visitors of our websites when they visit the social networks Facebook and Instagram. The meta pixel are code snippets which are able to identify your browser type via the browser ID - the individual fingerprint of your browser - and to recognise that you have visited our websites and what exactly you have looked at on our websites. When you visit our websites, the pixel establishes a direct connection to Meta's servers. Meta is able to identify you by your browser ID, as this is linked to other data about you stored by Meta on your Facebook or Instagram user account. Meta then delivers individualised ads from us on Facebook or on Instagram that are tailored to your needs.

We ourselves are not in a position to identify you personally via the meta pixel, as apart from your browser ID no other data is stored with us via the pixel.

For more information about the Meta Pixel, the details of data processing via this service and Meta's privacy policy, please visit Meta Privacy Policy - How Meta collects and uses user data for Facebook and Meta Privacy Policy - How Meta collects and uses user data for Instagram.

Meta Platforms Ireland Ltd. is a subsidiary of Meta Platforms, Inc. based in the USA. It cannot be ruled out that your data collected by Facebook will also be transmitted to the USA.


We did not wait for a law to make us respect our members and visitors' privacy. The cookies that we use are only meant to improve your experience on our website.

Our cookies
Cookies not subject to consent

These are cookies that guarantee the proper functioning of Audiofanzine. The website cannot function properly without these cookies. Examples: cookies that help you stay logged in from page to page or that help customizing your usage of the website (dark mode or filters).

Audience analysis (Google Analytics)

We are using Google Analytics in order to better understand the use that our visitors make of our website in an attempt to improve it. When this parameter is activated, no personal information is sent to Google and the IP addresses are anonymized.

Advertising (Google Ads)

This information allows us to show you personalized advertisements thanks to which Audiofanzine is financed. By unchecking this box you will still have advertisements but they may be less interesting :) We are using Google Ad Manager to display part of our ads, or tools integrated to our own CMS for the rest. We are likely to display advertisements from our own platform, from Google Advertising Products or from Adform.

Marketing (Meta Pixel)

On our websites, we use the Meta Pixel. The Meta Pixel is a remarketing pixel implemented on our websites that allows us to target you directly via the Meta Network by serving ads to visitors of our websites when they visit the social networks Facebook and Instagram. The meta pixel are code snippets which are able to identify your browser type via the browser ID - the individual fingerprint of your browser - and to recognise that you have visited our websites and what exactly you have looked at on our websites. When you visit our websites, the pixel establishes a direct connection to Meta's servers. Meta is able to identify you by your browser ID, as this is linked to other data about you stored by Meta on your Facebook or Instagram user account. Meta then delivers individualised ads from us on Facebook or on Instagram that are tailored to your needs.

We ourselves are not in a position to identify you personally via the meta pixel, as apart from your browser ID no other data is stored with us via the pixel.

For more information about the Meta Pixel, the details of data processing via this service and Meta's privacy policy, please visit Meta Privacy Policy - How Meta collects and uses user data for Facebook and Meta Privacy Policy - How Meta collects and uses user data for Instagram.

Meta Platforms Ireland Ltd. is a subsidiary of Meta Platforms, Inc. based in the USA. It cannot be ruled out that your data collected by Facebook will also be transmitted to the USA.


You can find more details on data protection in our privacy policy.
You can also find information about how Google uses personal data by following this link.