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For this reason, we picked 17 Best Free EQ VST Plugins, so you can choose your most favorite one and use it for mixing as well as for mastering. You may face several scenarios while mixing and mastering which may include the use of an equalizer, having a transparent display to analyze what you are adding or subtracting with the EQ, multiple EQ. AU or Audio Units are software plug-ins developed for the macOS and iOS operating systems. Like VST plug-ins, they may either generate sounds, as in the case of instrument plug-ins, or process them, as in the case of effects plug-ins. AU plug-ins are system-level plug-ins that utilize the Core Audio system in Apple operating systems.
You may face several scenarios while mixing and mastering which may include the use of an equalizer, having a transparent display to analyze what you are adding or subtracting with the EQ, multiple EQ bands, and proper CPU usage is what to look for in an EQ.
But with that said every piece of software and hardware alike creates and outputs a slightly different sound meaning they all have unique timbres and uses. Alongside that, there are some rather expensive plugins we may see online, which aren’t out of our reaches but we don’t know what we need until we need it right? Well, this is why its best to try some free EQ’s first to see what it is you like within an EQ and what it maybe you are looking for.
We become ever so comfortable with our stock plugins, they do the simple tasks for us (sometimes), they don’t run our computer into the ground, and they for sure are pretty basic. Well, this is the issue most people come to, they want a better EQ, or they want a change of visuals.
EQ History – ‘The first EQ was first used by John Volkman working at RCA in the 1920s”
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17 Best Free EQ VST Plugins In 2020 For Mixing And Mastering
- DDMF Colour EQ info & download
- SPL Free Ranger info & download
- Analog Obsession STEQ v2 info & download
- TDR Nova Parallel Dynamic Equalizer info & download
- Cockos ReaEQ info & download
- Blue Cat’s Triple EQ info & download
- Analog Obsession Merica info & download
- TinyQ lkjb info & download
- Sonimus SonEQ info & download
- Ignite Amps PTEq-X info & download
- Leftover Lasagne Pushtec 5+1A EQ info & download
- lkjb QRange info & download
- TDR Slick EQ info & download
- Manda Audio 7Q info & download
- Mellowmuse EQ1A info & download
- Voxengo Marvel GEQ info & download
- Kuassa BASIQ info & download
1. DDMF Colour EQ Review
More Info & Download
Specifications:
- 64-bit processing
- Low-CPU Usage
- Customizable GUI
- Great warm sound
- 5 Bands
- Resizable Window
Features & When To Use:
Colour EQ is a 64-bit EQ plugin that offers 5 ”super parametric” bands to manipulate the frequency range. This is exceedingly handy when wanting to use more than one band in one instance; the intuitive gain knobs on the five bands allow for perfect mixing of these bands when mixing and mastering.
Using the two different types of curves, Colour EQ offers a warm sound that you just wouldn’t get from your stock EQ.
Having a bright visual display helps you to craft and mould your bands to preference.
A great way to use this plugin is when you are not getting enough warmth in your low, mid/mids, Colour EQ will add a great sense of warmth throughout the selected bands. Another cool way to use this plugin is to use two different setups with two different curve types; you can use modified versions of the EQ for selected times in your mixdowns to add the feeling of a change in energy in a breakdown or drop.
Colour EQ is a great tool to have in your arsenal for mixing and mastering, plus you may find many uses in your day-to-day production.
Compatibility:
Windows VST (32/64 bit), Windows/Mac RTAS, and Mac VST/AU format (Intel, OSX 10.5 and higher)
2. SPL Free Ranger Review
More Info & Download
Specifications:
- Four useful bands
- Volume knob
- Great sound
- Four buttons to switch between EQ settings
Features & When To Use:
With a sleek, minimalistic design Free Ranger is a powerful EQ.
With a mid-band (150Hz – 7kHz), fixed high (10kHz), low shelf (80Hz) SPL have kept things very simple so anyone can EQ with ease.
Free Ranger gives the feel of the world-renowned API 560 EQ but offers this all for free!
Free Ranger is a bodybuilder for your sounds while mixing and a gentle touch when mastering, this plugin makes EQing fun, quick and easy.
You may find yourself using the four different EQ settings and incorporate them into your mixdowns. Using them to create different feels and vibes can give your masters that final touch you’ve been looking for.
This is a must-have!
Compatibility:
macOS 10.9 through 10.15, Windows 7-10
3. Analog Obsession STEQ v2 Review
More Info & Download
Specifications:
- mid-band (150Hz – 7kHz)
- fixed high (10kHz)
- low shelf (80Hz)
- Optical compressor knob
- Added preamp
Features & When To Use:
Simplicity is key with EQ work in the mix or master, and this plugin keeps that in mind through and through.
With a very easy to use GUI STEQ 2 has a powerful but simple way of delivering a small form factor EQ to your DAW.
This EQ gives off old school retro vibe, precise, clean, and adds a lot of detail to the mid-range.
STEQ 2 is excellent for tonal rebalancing due to the broadness of the three bands creating a pure blend between the frequency ranges.
Using this to add punch to claps and snares is also a good use. But be careful when adding to full bus groups.
This EQ from Analog Obsession is an excellent tool to keep at your disposal when thinking about doing some tasks during your mix, or why not change up those stock plugins for free.
Compatibility
WiN, OSX AU VST, VST3
4. TDR Nova Parallel Dynamic Equalizer Review
More Info & Download
Specifications:
Great for:
Features & When To Use:
Nova is a parallel dynamic EQ; each band has a dedicated, dynamic section giving the user full flexibility.
Giving the option to drag and move bands in the visual GUI individually or group, this provides a natural form factor way to get results.
Using the multiband compression built into Nova your be able to manipulate your EQ even further, this will be displayed in the visual GUI with real-time feedback of the compression process. (subtly decrease the threshold to hear the difference)
In mix and mastering, you can use Nova to visually see where you may have audio issues to fix and makes it very easy to apply these changes with the drag and change feature.
The dynamic EQ is a handy tool to have in practice when mixing down full compositions – use it to bring down or up frequencies only when they reach a specific volume.
Nova is a heavyweight EQ with a lot under the hood all for free!
Compatibility:
Win XP SP2 or above, Mac OS X 10.7 or above.
5. Cockos ReaEQ Review
More Info & Download
Specifications:
- Low CPU & RAM
- Fast and highly configurable
- Portable – copy & run
- Resizeable GUI
Features & When To Use:
ReaEQ may look basic, but under the hood, there is a lot to offer.
Being able to have as many bands as you wish is a massive bonus, you also have the ability to change all of these bands to one of the following (shelves, bands, LPF, HPF, notch, bandpass, allpass).
With a stripped-back GUI, it keeps you focused on the task at hand, not over complicating things but giving you the power of an audio god at your fingertips.
With a tremendous real-time visual display, this gives you the eyes and ear focus that you need when EQ in the mix.
Phasing is a big issue when mixing, ReaEQ gives you a ‘Show Phase’ button which will show you in your display what frequencies are being affected by the band.
When mastering you may wish to keep all bands in one EQ patch, with ReaEQ you can do this.
Stripped back and powerful ReaEQ is a favorite among many producers across a wide range of genres.
Compatibility:
WIN 32, WIN 64
6. Blue Cat’s Triple EQ Review
More Info & Download
Specifications:
- Semi-parametric EQ
- +/- 40dB Range per band
- MIDI control and automation support
- Real-time display
- All sample rates supported
Features & When To Use:
The Triple EQ is a three-band semi-parametric equaliser.
With a simple and easy to read visual display of the frequencies in real-time, you will have a clear display of the EQ in front of your eyes.
Alongside the huge +/- 40 dB range, Triple EQ has a bandwidth of .01 to 5 Octaves!
An exciting feature with Triple EQ is that you can link two bands together using the ‘Link Channels’ feature. This will allow you to use them in unison; combine this with the automaton support to create quick and easy modulation. This is a great way to change an EQ while in the mix with complex automation.
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Using the linking feature to create movement and progression within your mixdowns makes Triple EQ a threat.
Fully customisable shapes make this a different tool when deep in the mix or master, you will find many uses for the dynamic bands you can create—having dynamic bands that you are able to manipulate helps when visually your EQ and how it may affect the whole frequency range.
Check this one out for a small form factor powerful EQ!
Compatibility:
Windows 7 to 10, Mac OS 10.7 or newer.
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7. Analog Obsession Merica Review
More Info & Download
Specifications:
- Low & High Band – Shelf
- Mid Band – Proportional Q Peak
- HP & LP Filter – Constant
- Low CPU usage
Features & When To Use:
We have another FREE plugin from Analog Obsession!
This time is bringing you Merica an emulation of the API 550A console equaliser.
A simple three-band EQ delivers a lot of power to your mixes and masters. Selectively choose which frequency your band boosts or cuts with the option to the right of the knobs.
All bands kept simple and easy to get to grips with.
Meica also has a nifty and very much needed output knob, there will be no issues with clipping in the digital domain when mastering with this plugin.
A larger than appearing sound Merica is an excellent EQ plugin to use when in the mixdowns and masters.
Given that the EQ it emulates is an industry-standard plugin this small form, powerful, easy to use, and was coded by one man! Merica is a must grab for all audio creatives looking to upgrade their stock EQ plugins.
Compatibility:
VST Win, VST3 Win, VST Mac, VST3 Mac, AU Mac
8. TinyQ lkjb Review
More Info & Download
Specifications:
- Four bands (20 Hz to 20 kHz)
- Small form factor (ability to make larger if wanted)
- High & Low cuts range is 6 and 48 dB/octave
- Included frequency analyser
Features & When To Use:
TinyQ is a small form factor EQ.
Giving the user a stripped-back interface TinyQ offers a solution to a simple job.
Having too many settings can become overwhelming; TinyQ does what it says on the tin and doesn’t make your job any harder.
Keeping things simple when mixing down whole groups is essential – finding yourself using CPU heavy EQ, or a stock plugin just might not cut it for you. TinyEQ is excellent for doing those necessary but straightforward EQ tasks!
With the recent addition of built-in frequency analyzer, it makes EQ even easier when getting stuck into your mixes or masters.
Create awesome sounding band curves.
Great emphasis on keeping things simple goes a long way with TinyQ; the team has made a great EQ that does everything it needs to in one small package. With four bands plus high pass/low pass filters, you won’t be looking any further for your day to day EQ needs.
Compatibility:
Windows 7 or later, macOS 10.7 or later (both 64 bit)
9. Sonimus SonEQ Review
More Info & Download
- Three-band Equalizer, Low, Mid, High.
- 2 Musical Filters, High-Pass Low-Pass.
- Preamp stage with a bass booster.
- 64-bit floating-point precision.
- Up to 192kHz sample rates supported.
Features & When To Use:
SonEQ has 3 bands, low (20 Hz – 100 Hz), mid (150 Hz – 4 kHz), high (6 kHz – 15 kHz). Combined with a high pass and low pass filter, plus a ‘Mid-high Q’ this means when it’s on your band its narrow and when deactivated will cause it to be wider. This indicated by the red light.
Giving the user a lot of ways to EQ but keeping things user-friendly is what SonEQ does best.
Having the volume meter is very hand when mixing with any EQ, it gives the visual display of when things are getting a bit heated for your output.
SonEQ also gives you the full control of your input and output levels. This comes in handy when you are mixing your tracks with heavy effects, causing the overall levels to become louder than 0.0dB; this is where adjusting both the input and output parameters will solve the issue.
With this plugin being free for all to use we don’t see any reason why this shouldn’t be ready to deploy at the click of a finger, whether it’s beefing up the mix with the built-in bass boost preamp staging or adding a touch of colour to the highs this plugin has you covered.
Compatibility:
Mac OSX 10.6 or newer – Windows XP or newer
10. Ignite Amps PTEq-X Review
More Info & Download
Specifications:
- Three equalisation modules
- Stereo/Mono switching
- Four different tube types
- Global input/output level control
Features & When To Use:
PTEq-X is a digital emulation of three famous vintage EQ.
Equipped with three EQ modules comprised of mid-range (2kHZ – 7 kHz), low-frequency (20Hz – 150Hz), high-frequency (3kHz – 16kHz).
Using the mid-range module, you can use the low, mid parameter (top left) to effect the lower mid frequencies. Alternatively use the high mid setting (top right) to cause-effect to these frequencies.
Moving down the EQ, we have our second module, which is PEQ1A EQ (Low & High). This comes with a bunch of parameters to mould your EQ patches perfectly to your source.
Finally, this is all topped off with the HL3C module; this is a low-cut accompanied by a high-cut.
You can also use the ‘Oversampling’ feature to reduce aliasing.
Use the “Tube” switch to apply or deactivate the tube amp.
Using the input and output levels will give you the ability to control any nasty peaks brought in or out of the EQ.
PTEq-X is a combination of some of the best analogue EQ’s to exist, plus its FREE!! We recommend this one for a great addition to your EQ arsenal.
Compatibility:
Windows 7 – 10 32 and 64 bit. OS X 10.7 64 bit
11. Leftover Lasagne Pushtec 5+1A EQ Review
More Info & Download
Specifications:
- 6 Band mid-range EQ
- Presets built-in
- Algorithms based on famous analogue gear
- Designed for mixing and mastering
Features & When To Use:
Pushtec 5+1A is a versatile mid-range program EQ that has mixing and mastering at its heart.
This plugin offers six bands, all offering a fantastic sounding boost through all parameters.
Free drum vst instruments for cubase. A vast selection of plugins makes it easy for users to start with something super effective and tweak to their liking.
“B/W” stands for bandwidth, this allows you to tweak the selected band and adjust to your preference.
A friendly and straightforward GUI keeps this EQ a smaller form factor but with a lot of power. Being designed for mixing and mastering be assured that this plugin delivers best when applied to a whole group or a master channel.
Giving instant sparkle to a mix or a very much needed bass boost this FREE plugin has you covered!
Compatibility:
Win 7 or higher only
12. lkjb QRange Review
More Info & Download
Specifications:
- 12 bands
- peak, shelf and cut filter
- Cut filters (12, 24 and 48 dB/oct steepness)
- Stereo/Left/Right/Mid/Side routing for each band
- A global gain for loudness adjustments
- Resizable GUI
Features & When To Use:
QRange is a very straight forward, user friendly, and effective EQ for mixing and mastering.
Giving the user an intuitive click and drag feature makes EQ work easy and more controllable.
With a choice of twelve bands, there is excellent room for doing additive plus subtractive EQ all in one plugin patch. Each band has. Selection of up to five different types (peak, low-shelf, high-shelf, low cut, and high cut).
Built into the frequency spectrum, you have the power to change it to pre or post. ‘Pre’ will let you see what the frequency range looks likes before the EQ is applied, whereas ‘Post’ will allow you to see it after the EQ has taken effect.
Offering the ability to users to save and load their own presets makes it easy to bring back some of your favourite patches while working on a mix or master.
It has to be said lkjb QRange is a must-have FREE EQ plugin.
Compatibility:
Win 7 or higher, macOS 10.7 or higher
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13. TDR Slick EQ Review
More Info & Download
Specifications:
- Semiparametric EQ layout
- Three bands combined with 18dB/Oct high-pass filter
- Four EQ models: “American”, “British”, “German” and “Soviet” with optional non-linearity
- Five output stages: “Linear”, “Silky”, “Mellow”, “Deep” and “Toasted”
- Saturation algorithms by VoS (“Stateful saturation”)
Features & When To Use:
TDR’s Slick EQ provides a recognizable analogue sound.
Using three bands that bring together four different EQ models.
Both low and high bands are coupled with a cut and bell feature allowing for comfortable band changing.
Auto gain estimates the gain change caused by the current EQ settings; this makes it great to compare your EQ setting during the mix. There is also an ‘EQ Sat’ button; this will activate the saturator which is very intelligently paired to your EQ bands. This will add harmonics when boosting and remain passive when cutting.
Being able to save your favourite EQ settings for a later mix or master can be done within the plugin. Coupled with a undo/redo button you never miss that sweet spot for your bands, alternatively set up two different EQs with the A/B switch.
Slick EQ gives a very stripped back interface meaning you don’t get caught up with the visuals when doing equalising, providing a focus on what your hearing. This EQ shouldn’t be overlooked, with great coding, algorithms, settings, and excellent sounding types SlickEQ delivers more than you would expect from a FREE plugin.
Compatibility:
Win 32 bit VST2, VST3, Win 64bit VST2, VST3, AAX
Mac VST2, VST3, AU, AAX 64 bit
14. Manda Audio 7Q Review
More Info & Download
Specifications:
- Seven band EQ
- Highpass/lowpass
- Stereo/mono options
- Left/right options
- Output level
Features & When To Use:
Manda Audio brings us 7Q.
7Q is an emulation of the beloved ‘Classic EQ’ which became discontinued, the team came together and brought the community back a redesigned version.
7Q takes off all the fancy parts and gives you the bare basics; this is what gives this a place on our list. With 7Q giving you the ability to apply your EQ to the left or right or both channels, you can independently EQ both sides of the stereo field.
Each band can be additive or subtractive. Keeping easy to use format is what this plugin does best; it doesn’t over-complicate the task at hand but assists your needs along the way wether mix or master.
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Low memory and CPU usage make it easy to have multiple instances in your projects without having your computer meltdown.
7Q is a nifty EQ that is awesome for giving your sounds a little crisp boost before running into your other plugins within the chain.
Compatibility:
Win VST 32/64 bit, AAX 32/64 bit
Mac VST, AU, AAX
15. Mellowmuse EQ1A Review
More Info & Download
Specifications:
- HP: 10hz – 1khz / sweepable Q
- Low Shelf: 30hz – 500hz
- Low Mid: 70hz – 2khz / sweepable Q
- High Mid: 500hz – 6k / sweepable Q
- High Shelf: 1.5k – 18k
- Phase switch
- Output level
- 64-bit internal processing
- Formats: 64bit VST, VST3, AU and AAX
- Version: 3.2
- Legacy 32bit installers
Features & When To Use:
EQ1A is a FREE analog-style EQ with a clever algorithm giving you minimal phase coloration.
This plugin has initially been paid to use the plugin, but the developers have decided to give it to us all for FREE!
EQ1A allows you to use broad bands to shape your sounds or outputs in a clean, crisp and phase-corrected way.
Being able to save you presets within the plugin makes it very easy to pull back that EQ you made on the last mix. 4-band parametric equalizer with an additional HP filter with variable resonance gives a wide range of settings to play with while keeping everything simple and user friendly.
EQ1A does what it says on the tin for FREE!
Using this within mixing or mastering may help you when wanting to add a hefty highpass or when looking to give some warmth to your mid ranges.
It has to be said with a great look, and low CPU usage EQ1A is an excellent addition to your plugins.
Compatibility:
Win, Mac
16. Voxengo Marvel GEQ Review
More Info & Download
Specifications:
- 16-band graphic equalizing
- +/- 12 dB gain range per band
- Channel grouping
- Preset manager
- Contextual hint messages
- Freehand drawing mode
- Stereo and multi-channel processing
- Mid/side processing
- Undo/redo history
- All sample rates support
- Linear-phase equalizing
- Internal channel routing
- 64-bit floating-point processing
Features & When To Use:
Voxengo is notorious for doing some excellent free plugins.
This addition is the Marvel GEQ, which is a fifteen band linear phase EQ.
There is a routing tab that allows you to affect the signals mid/sides independently. (orange slides)
Also giving full independence to the mid/side output level, becoming very useful when mixing and mastering.
Bypass feature makes it simple to hear what your EQ is doing to your sound source. Alternatively, decide between two EQ setups with the A/B mode.
For quick EQ drawing, you can hold ‘Ctrl or Cmd’ and click across the EQ drawing in your fader settings with the click of a mouse.
Having a stripped back form factor with enough controls to complement your mixing tasks this plugin has to be our list today.
Compatibility:
VST Win, VST3 Win, VST Mac, VST3 Mac, AU Mac
17. Kuassa BASIQ Review
More Info & Download
Specifications:
- Three-band EQ
- High, mid, low
- Presets tab
- Output level
- Very simple to use
Features & When To Use:
BASIQ is a three-band EQ.
It keeps in mind that EQ work for mixing and mastering doesn’t have to be a headache or over complicated.
BASIQ is a design similar to the classic ‘Baxandall Equalizer’ which is knowns for its natural-sounding shelves and HiFi quality responses.
Adding a smooth, gradual shimmer or warmth instead of a surgical sharpness is what BASIQ does best. Use on groups or a master chain to subtly but significantly add character with the turn of a knob.
With some added presets you be able to get a quick change in tone with the click of a button.
The small form factor makes this BASIQ a powerful tool to be used within the mix or master.
Compatibility:
Win, Mac, VST, AU, 64 bit
Our Picks For Top 3 Free EQ VST Plugins
With all of that said, grabbing all 17 plugins wouldn’t do you any harm, but we want to break down our top 3 picks!
1. DDMF Colour EQ Review
In our top spot, we have Colour EQ by DDMF.
This plugin brings so many features that you would expect from pay to use plugins but all for FREE! Another fresh point is that the curves you can create with this cannot be done on other EQ plugins, giving Colour EQ a versatile approach.
Low-CPU – Usage Customisable GUI – Great warm sound – 5 Bands
2. TDR Nova Parallel Dynamic Equalizer
Coming in second is Nova by TDR.
Parametric, dynamic EQ, and multiband compression are all built into an excellent looking FREE plugin.
Nova has a built-in dynamic EQ parameter when mixing, and mastering using a dynamic EQ is crucial sometimes. Having this all in one plugin for free is hugely commendable to the team who developed this plugin!
Parametric equalization – Dynamic equalization – Frequency selective compression – Multi-band compression – Wideband compression
3. Blue Cat’s Triple
And finally, our last top pick is ‘Triple’ by Blue Cat.
This awesome plugin has so many features you just wouldn’t expect a FREE plugin to have.
With a fresh interface and drag and click feature to make EQing even more natural Triple is a powerful EQ.
Semi-parametric EQ – +/- 40dB Range per band – MIDI control and automation support – Real-time display
Today we have covered a lot of great FREE EQs for mixing and mastering. Amazingly, we have developers putting out all of these plugins for producers/sound engineers to level out the playing field. As we have all seen these ‘not to name’ brands releasing rather expensive EQs that we just can’t fork out for, but with the way, music has progressed today in the digital domain it has become much more accessible for creatives to share their ideas and effects for free.
With that said, they all have their benefits and downsides, but with them all being free, there is no reason you can’t pick them up and use these in your mixes or masters today!
A good spectrum analyzer plug-in is essential for letting you know what is going on with your audio.
Even if you have a good monitoring system in your studio, a spectrum analyzer will help you identify potential problem areas in your mix.
Here, we run down some of the best spectrum analyzer VSTs available, giving you a range of potentially useful options.
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Top 7 Spectrum Analyzer VST Plugins
1. iZotope Insight
Demo & Price
iZotope’s aptly-named Insight gives you a broad overview of the spectral content of your audio while giving you the ability to get as detailed as you wish. It comes with plenty metering options to choose from, that can be customized as you fit, enabling you to use it for any type of session. Whether you simply want to check the spectral balance of your mix or you want to tweak the loudness or intelligibility of specific tracks.
Specs and useful features
Insight lets you visualize audio streams in ways that probably only a few spectrum analyzer plugins can. Unlike other plug-ins that force you into a specific way of working, Insight lets you customize the user interface according to your preferences or the demands of the session.
With Insight, you can choose to display only the meters that you need for any given situation. The interface is resizable as well, so you can keep it fairly compact when your screen gets too crowded. If you want to have visual access to more information, you could simply maximize the interface to occupy the full screen.
Of course, you have a great degree of control over viewing the display as well. You can adjust partition sizes however you want, and each meter even comes with dedicated display settings.
User impressions
“Comprehensive” is one word that is commonly used to describe Insight. It gives users the flexibility to view data however they wish, with zooming, scaling, and even freezing options provided.
The option to choose between 2D and 3D spectrogram displays scored points among many users as well. For users that need the ability to change viewing modes for different projects, Insight stands apart from most other spectrum analyzer plug-ins.
Bottom-line
iZotope’s Insight could very well handle all your spectrum analysis needs and then some. If flexibility and accuracy are your primary concerns–as they should be when shopping for a spectrum analyzer–you can’t go wrong with Insight.
2. NuGen Visualizer
Demo & Price
NuGen’s Visualizer may not be a household name in the world of spectrum analyzer plug-ins, but that in no way indicates any shortcomings on its part. Just as capable as its more popular counterparts, it provides feature-packed tools for analyzing audio and enhancing workflow. Furthermore, Visualizer helps you recreate optimal mix settings and avoid frequently-repeated errors.
Specs and useful features
Visualizer provides a single-screen interface for viewing the frequency content of the audio material. The interface can be resized freely, taking up very little screen space or providing a comprehensive overview as needed. There are also many options to customize the display, and you could switch to any of several views simply by clicking a button.
But it’s what you can do within those views that matter the most. Visualizer has a useful comparison mode that let you view frequency content and other information from two audio channels in a few different ways. You have the option to view both audio tracks overlaid on top of each other, side-by-side, or in a differential display.
Other features–such as the stereo spectrogram, vectorscope, stereo bias meter, and peak hold control–give you a range of options by which to analyze your audio. You can even view frequencies by how they correlate to each other, making it easy for you to identify potential frequency overlaps.
User impressions
Users of Visualizer have found numerous applications for the plug-in, particularly during the mixdown and mastering stages of production. One common application is the examination of the differences that a mastering chain imparts on a mix. The plug-in makes it possible to identify frequency clashes quickly, and the ability to customize the display makes audio analysis both easy and efficient.
Bottom-line
NuGen Visualizer is a powerful and attractive-looking spectrum analyzer plug-in that can handle a multitude of audio-related tasks. It is a good deal more expensive than other plug-ins in its category, but the extra cost is justifiable given its versatility and range of features.
3. MeldaProduction MMultiAnalyzer
Demo & Price
MeldaProduction is known for its high-value plug-ins that provide professional features at a reasonable price point. MMultiAnalyzer upholds the company’s reputation admirably, with a host of features that make it possible to analyze audio and deal with any issues easily and accurately.
With a selection of audio analysis and enhancement features, MMultiAnalyzer enables you to analyze multiple tracks simultaneously. Simply patch in an instance of the plug-in in each track that you want to analyze, and they will detect each other automatically. All data will then be available to all instances of the plug-in.
Specs and useful features
MMultiAnalyzer is more than just a spectrum analyzer plug-in. It also has a built-in sonogram, and collision detection, loudness comparison, and stereo analysis features. Even with all these features, the plug-in never gets too complicated to use. Whether you use it as a multi-track sonogram, a collision detector, or a stereo analyzer, the MMultiAnalyzer workflow is fast and intuitive.
MMultiAnalyzer also comes with features that make it easy to identify specific frequencies. These include normalization, super-resolution, and de-harmonization features, all of which help you pinpoint problem areas in your audio.
User impressions
Like all MeldaProduction’s plug-ins, MMultiAnalyzer is customizable to a remarkable degree. The interface is freely resizable, and users have the option to display the controls as knobs, buttons, or sliders. Even with all the impressive technical features onboard, the plug-in’s customizability is what stands out the most among many users.
Of course, the aforementioned technical features are the main draw for professional users and serious hobbyists. The ‘smart’ metering is one of the most advanced of its kind, giving users the option to display frequency measurements in a variety of graphs and meters.
Bottom-line
MMultiAnalyzer is one of the most versatile spectrum analyzer plug-ins around. It is absolutely flawless in terms of accuracy, and the degree to which you could customize the interface is a definite plus. Even with so many capable spectrum analyzer plug-ins available, this one stands apart from the rest.
4. Blue Cat Audio Analysis Pack
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Blue Cat’s Audio Analysis Pack gives you pretty much everything you need to analyze and measure the frequency content of audio in one convenient package. The pack contains a dazzling array of useful plug-ins, all of which are available individually as well. Among these are two frequency analysis plug-ins, both of which provide performance equal to that of dedicated spectrum analyzers. Furthermore, these plug-ins let you can control other plug-ins–and even MIDI instruments–with the resulting measurements.
Specs and useful features
Because this is a review of spectrum analyzer plug-ins, we will focus on those specific types of plug-ins in the pack.
First up is FreqAnalyst Multi, which provides a variety of spectrum analysis features for multiple tracks. Ideally-suited for mixing and mastering, it provides a detailed view of the frequency and time of several tracks simultaneously, all from a single screen. A useful and versatile mixing tool, it will also find plenty of use as a frequency overlap detector.
The second smartphone plug-in is FreqAnalyst Pro, which adds automation generation capabilities and a 3D viewer to the standard set of spectrum analysis features. Offering much of the same functionality as the free FreqAnalyst plug-in, it provides an extremely smooth and high-resolution view of frequency as well as time.
User impressions
The individual plug-ins in the Audio Analysis Pack come with an impressive wealth of features that provide tremendous value. Most users seem sufficiently impressed with the amount of information provided, with the automation and MIDI capabilities simply being the icing on the cake. For many, the clever implementation of CC/automation generation features makes these tools so much more versatile than most standard spectrum analyzer plug-ins.
Bottom-line
The overall value provided by the Audio Analysis Pack is pretty impressive. Even if you opt to purchase just the individual spectrum analyzer plug-ins, expect to get plenty of bang for the buck.
5. Photosounder Spiral
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To describe Photosounder’s Spiral as a music analysis plug-in would be accurate–but it does underplay its capabilities a bit. Spiral certainly does a great job of revealing the frequency content of music, but its fresh and innovative approach to audio analysis places it so far ahead of other plug-ins that it is almost in an entirely different category.
Frequencies are displayed in a spiral (no surprise there), with a chromatic band encircling it. It is a simple enough concept to be sure, but the ability to see what is going on in your music quickly and intuitively is noteworthy. Spiral also provides many other features that give you a more detailed and informative view of your audio.
Specs and useful features
In the Spiral display, individual instruments have specific colors that represent their unique positions in the stereo mix. The plug-in also makes it possible to capture or record bits of audio into memory and play it back at slower speeds. This feature is helpful for identifying individual notes or deciphering chords.
You can even adjust the resolution at which stored audio plays back. You can lower the resolution for more precise time measurement for instance, or increase it when you need to analyze low-frequency instruments or complex chords.
User impressions
Users found Spiral to be as useful as an audio analysis tool as a musical aid. The bright colors and stereo separation make it possible to identify tones and notes quickly and accurately.
As a learning tool, Spiral is pretty much incomparable in the world of spectrum analyzer plug-ins. Its ability to highlight specific sections of the audio, capture it, and play it back at slower speeds are features that simply don’t exist in any other spectrum analyzer plug-in.
Bottom-line
Spiral probably isn’t the best choice for analyzing audio for mixing or mastering purposes. More a musical aid than a frequency analysis tool, it should nevertheless find a welcome place in your plug-in collection.
6. 2nd Sense Audio Mixing Analyzer
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2nd Sense’s Audio Mixing Analyzer hides an impressive wealth of features in a simple and modernistic interface. Like the best spectrum analyzer plug-ins, it allows the real-time monitoring of multiple tracks of audio, with the data viewable from a single window. It also identifies instances where frequencies collide and mask each other. Whether you need to pinpoint problem frequencies in specific audio tracks or simply want to check your level balances, Audio Mixing Analyzer could be a useful tool.
Specs and useful features
Like other spectrum analyzer plug-ins that allow for the monitoring of multiple audio streams, Audio Mixing Analyzer is meant to be loaded onto each track to be analyzed. All tracks will then be visible on any instance of the plug-in, each in a different color. You can also label each track as you see fit.
A vertical line will pop up on the display if any frequencies clash or overlap. You can then instantly see where two or more parts are occupying the same frequency range. An included threshold knob lets you control how frequencies clashes are displayed, with shorter instances showing up as more pronounced movements of the indicator line.
A scrolling display below the spectrum display provides real-time information on the clashing frequencies, as well as the measure and beat position where they occur. There are also illuminating blocks to the left that indicate the presence of tracks with conflicting frequency content.
User impressions
Audio Mixing Analyzer may be fairly simple, but users seem satisfied at the amount of information provided. By presenting data as text as well as visual form, users can identify frequency clashes easily, and quickly determine what steps to take to remedy potential issues.
Bottom-line
Audio Mixing Analyzer isn’t the most fully-featured spectrum analyzer around. In fact, it is one of the simplest in this rundown, without a lot of esoteric display settings and customizability options onboard. Nevertheless, it is a capable enough analyzer for the most part, and it should find plenty of use in any studio.
7. Voxengo SPAN
Demo & Price
Voxengo’s SPAN is something of a classic in the audio world, providing spectrum analysis capabilities equal to that of the best plug-ins. Remarkably, SPAN is free, which makes its professional features and capabilities even more impressive.
Even so, Voxengo saw fit to release an “extended” version of SPAN, dubbing it the SPAN Plus. Building on the already impressive features of its freeware predecessor, SPAN Plus added a static spectrum display option, PNG file export, and the ability to import and export spectrum data in real-time.
Specs and useful features
SPAN Plus has a new “mode” system that gives you the flexibility to set the display according to your preferences. This feature lets you view Fourier block size in samples, and lets you set the overlap percentage of the FFT window. You can also specify the visual slope of the spectrum, change how the secondary spectrum is displayed, and even smoothen out the spectral display as desired.
SPAN Plus makes it possible to perform a variety of analysis methods. You can compare the spectrums of different tracks at the same time, with unique colors for each channel.
User impressions
SPAN Plus especially impresses users with its ability to perform multi-track comparisons from a single window. The ability to compare EQ curves pre- and post-mastering on the same graph makes it a flexible and useful tool for mixing and mastering.
It is interesting to note that many users find the free SPAN to be just as capable as the SPAN Plus for their needs. But that is more a testament to the excellence of the free plug-in than it is a criticism of SPAN Plus.
Bottom-line
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SPAN Plus is an excellent spectrum analyzer plug-in in more ways than one. Admittedly, you could get pretty much the same features in the free version of SPAN. But if the ability to compare the spectrums of two different audio sources at the same time is important to you, SPAN Plus is a no-brainer.
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Spectrum Analyzer VSTs
What is spectrum analysis?
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In an audio and musical context, spectral analysis is the process of measuring the frequency content of audio signals. Using a function known as “Fourier transform”, audio is broken down into its component frequencies and displayed on a screen.
Spectrum analyzers–purpose and function
Spectrum analyzers essentially provide visual representations of sound. They measure the frequencies of audio signals and display the results in a graph in real-time. The horizontal axis represents the pitch/frequency of the audio, while the vertical axis represents the amplitude. Pitch/frequency is measured in Hertz, and amplitude is measured in decibels.
By providing a visual representation of audio, spectrum analyzers make it easier to identify specific areas of the frequency range that may cause problems in the mix later on. When used in conjunction with standard audio monitoring, spectrum analyzers can enhance efficiency during the mixing and mastering processes.
Essential features
The display is the most important part of a spectrum analyzer. This is where you can see the frequency content of your audio and how “hard” specific frequencies are hitting. You can then figure out which frequencies you will have to cut or boost to fix any problem.
The best spectrum analyzers give you more specific details on frequencies and levels when you place your cursor at certain points on the display. Some plug-ins even allow you to zoom in for a more accurate view of the levels.
How to choose the best spectrum analyzer
Accuracy is, of course, one of the most important aspects of a spectrum analyzer. You will want to pay particular attention to this quality when comparing the different spectrum analyzer plug-ins available.
You should also look into the option to set the FFT block size a few different ways. This feature allows you to view frequencies at different resolutions, which could help you identify problem areas in specific frequency ranges.
One important thing to keep in mind is that spectrum analyzers can not–and should not–take the place of proper monitoring via speakers or headphones. By all means, use spectrum analyzer plug-ins for an added perspective while mixing or mastering. But don’t forget that what ultimately matters is how the music sounds–not how it looks.