MixingVocalsEQTame Harsh Vocals With A Free Resonance Suppressor
A step by step pass on a harsh vocal with GLOAM, a free resonance suppressor: where it goes, where to focus it, how deep, and how to hear what it took.

Seven free plugins suggested instead of soothe, checked on each maker's own page: which are really suppressors, which are really free, and what they need.
Search for a free soothe alternative and most of the first page is videos, a five year old forum thread and lists written by companies that sell a paid suppressor, which then appears at the top of the list. Several lists with "free" in the title recommend nothing that is free. So we did the dull part: we took every free plugin these pages and the forums suggest, opened each maker's own page in November 2026, and wrote down what it is, what it costs, what it runs on and what it asks of you. One of the seven is ours, GLOAM, and it is marked as ours. Nothing here is a listening test. We have not run them on the same material and we do not rank them by sound.
The plugins suggested under this search are not one category, and that matters more than any single feature. An automatic resonance suppressor watches the whole spectrum and decides by itself where to cut and for how long. That is what soothe does, and in the free column it is GLOAM, CRQL ANINA and Mercurial Tones Dagon.
A dynamic EQ cuts only where you place a band. TDR Nova is the free plugin forums have named most often since 2019, and ZL Equalizer 2 is an open source one with up to 24 bands. Both are excellent at a known problem and neither looks for one. The difference is laid out in resonance suppressor vs dynamic EQ vs de-esser.
The third group softens the top end. Wavegrove Vastaus describes itself as bringing down and blocking overly harsh high frequencies, and Airwindows Acceleration2 is a high frequency limiter. They are useful on sibilance and cymbals and they are not resonance suppressors, by their makers' own descriptions.
Compared
Every row was read from the maker's own page on 4 November 2026. soothe3 is the reference, not a free entry.
| Plugin | Price | What it actually is | Formats and platforms | What it asks for | Newest dated signal |
|---|---|---|---|---|---|
| Nolvra GLOAM (ours) | Free | An automatic resonance suppressor with a focus range and a five band sensitivity curve | VST3 on Windows 10 or later. VST3 and AU on macOS 11 or later, Apple Silicon and Intel | Nothing. No account, no licence key, no activation | Version 1.0.0 |
| CRQL ANINA | Free, donation optional | Spectral resonance suppression that can also isolate the resonances | VST3 and CLAP on Windows. VST3, CLAP and AU on macOS, with an arm64 build. VST3 and CLAP on Linux | A download. No form on the page | Version 1.1.1, March 2026 |
| Mercurial Tones Dagon | Free | Resonance and volume control with five detection modes | VST3 and AU. Windows 10 64-bit with an AVX2 processor. macOS 11 or later, Apple Silicon native | A free checkout tied to an account, installed through the maker's own hub | Released June 2026 |
| Tokyo Dawn Labs TDR Nova | Free | A parallel dynamic EQ with four dynamic bands plus high and low pass | VST2, VST3 and AAX on Windows. VST2, VST3, AU and AAX on macOS, native on Apple Silicon. Linux too | A download. The newsletter is optional | Version 2.2.3 |
| ZL Audio ZL Equalizer 2 | Free and open source | A dynamic EQ with up to 24 bands and side chain | Separate Windows x86-64 and arm64 builds, separate macOS arm64 and x86-64 builds. The page does not list formats | A download from the release page | Version 1.4.1, 28 September 2026 |
| AIDE AUDIO TP-1 | Free version, paid full version | Noise reduction, resonance suppression and a four band EQ. The free version is capped at 50 percent reduction | VST3 on Windows and macOS, AU on macOS. Windows 11 or later, macOS 13 or later | An internet connection for the first activation | Version 1.0.3, 23 September 2026 |
| Wavegrove Vastaus | Pay what you want, from zero | A high frequency smoother for sibilance, cymbals and guitars | VST3 and AU on macOS. VST3 and VST on Windows. No Pro Tools version | A checkout on its store page | No version on the page |
| oeksound soothe3, for reference | Paid | Identifies resonances on the fly and applies matching reduction | VST3 and AAX on Windows 10 to 11. VST3, AU and AAX on macOS 10.14 to 26, Apple Silicon supported | A fully featured 20 day trial. soothe2 is now a legacy download | Version 1.0.5 |
Three plugins that appear in free lists and headlines are paid today: Kobito ResSup, Plea Tech Pure Amber and Cymatics Velvet Lite were free for a launch window or with a coupon. Check the store page before you trust a headline.
Platform rules out more options than features do. On an Apple Silicon Mac, check for a native build. On Windows, Dagon asks for an AVX2 processor and TP-1 for Windows 11. On Linux, ANINA and TDR Nova list builds on their pages.
If you would rather place the cut yourself, a dynamic EQ like TDR Nova gives exact control. If the rings move from line to line and you do not want to chase them, you want one of the three automatic suppressors.
Some free plugins are a plain download, some need an account and a separate installer, and one stops at half strength until you pay. None of these is wrong, but they are different kinds of free.
Every one of these removes energy, and the quieter version always sounds duller for a few seconds. Match the output level before you compare, listen in the mix rather than soloed, and use a delta or difference monitor where the plugin has one to hear what it is taking. A full pass on a harsh vocal shows the routine.
GLOAM is ours, so here is what separates it on paper and nothing more. It needs no account, no key and no activation. It is built to leave two things alone: a sung note, which arrives as a series of harmonics, and a steady tone under 250 Hz, which is how an 808 or a held sub reads. It has a focus range, a five band sensitivity curve, Soft and Hard modes, and L/R, Link and M/S stereo. It looks ahead, so it adds 1024 to 4096 samples of latency, reported to the host. It has no CLAP, Linux or AAX build. Whether it suits your material is a question for your ears, on your tracks.

GLOAM finds the ringing frequencies by itself and turns each one down only while it rings. VST3 on Windows, VST3 and AU on Mac, no account and no key.
Yes. Three free plugins work the same way, watching the spectrum and cutting resonances automatically: Nolvra GLOAM, CRQL ANINA and Mercurial Tones Dagon. TDR Nova and ZL Equalizer 2 are free dynamic EQs, which cut only where you place a band.
It is the free plugin forums have suggested most often since 2019, but it is a parallel dynamic EQ with four dynamic bands. You choose where it works. An automatic suppressor finds the frequencies itself.
On the makers' own pages: GLOAM, Dagon, TDR Nova and TP-1 state it, and ANINA and ZL Equalizer 2 offer arm64 builds. Wavegrove's page for Vastaus does not say.
oeksound now sells soothe3, with a fully featured 20 day trial, and lists soothe2 under legacy downloads.
Guides
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MixingVocalsEQA step by step pass on a harsh vocal with GLOAM, a free resonance suppressor: where it goes, where to focus it, how deep, and how to hear what it took.
MixingEQVocalsAll three turn something down only while it is too loud. What differs is who picks the frequency and what sets it off, and that decides which to use.