A vocal rings on two or three notes. Cut the frequency with an EQ and the rest of the performance goes thin; leave it and the ring stays. That is the job dynamic resonance suppressors exist for, and the search for “soothe2 alternatives” is usually someone looking for one.
This page compares five tools by what their own pages state. We make ENZYME, one of them, so we state its limits as plainly as the others’. We compare stated facts here, not sound quality, and we have not published a listening comparison of these tools on AI-generated vocals.
The short answer
Use a dynamic resonance suppressor when the problem is a ring that appears only on some notes or moments; use a fixed EQ cut when it sits at one frequency all the time. The suppressors below all find peaks themselves; the practical differences are formats, operating systems, trial terms, latency and price. oeksound’s soothe2 page now redirects to soothe3, so soothe3 is the same vendor’s current product.
Is this your problem?
| What you hear | What it usually is | What fits |
|---|---|---|
| A ring that blooms only on certain notes | A resonance excited by some pitches, such as a room or a body | A dynamic resonance suppressor |
| A whistle or hum at one pitch for the whole take | A stationary resonance | A fixed EQ notch |
| Harshness spread across the mix bus | Accumulated peaks nobody put there on purpose | A suppressor at low depth, or a dynamic EQ |
| Shimmer or watery texture that moves with the music | Residue, not a single peak | An artifact remover; a suppressor is not built for it. See the measured comparison |
Our ENZYME manual gives the standard example: a 380 Hz ring on a vocal is only a problem on the notes that excite it, so a notch at 380 Hz also thins every other note that passes through that frequency for the whole take. Two of our guides show the same idea on room resonance on vocals and snare ring.
What about soothe2?
As of October 20, 2026, oeksound’s soothe2 page redirects to its soothe3 page. soothe3’s page mentions soothe2 only in the user reviews it quotes and does not say whether soothe2 is still sold, so we cannot tell you whether you can still buy it. Our measured comparison of AI music artifact removers includes a legacy soothe2 on Suno and ACE-Step tracks.
The tools compared (as of October 20, 2026)
The table records what each vendor page states. “Not stated” means the page we read did not say.
| Tool | What the vendor says it does | Formats and systems | Cost and trial | Latency |
|---|---|---|---|---|
| ENZYME (Intrect) | Finds narrow peaks that stand out from their surroundings and pulls them down per frequency bin and per frame; nothing is boosted; an optional harmonic/percussive/residual stage | VST3, CLAP, AUv2; macOS 11+ (Universal), Windows 10+ (64-bit) | $99 once; 14-day trial | 46 ms at 44.1 kHz |
| oeksound soothe3 | “Identifies problematic resonances on the fly and applies matching reduction automatically” | Windows: VST3, AAX; macOS: VST3, AU, AAX; Windows 10/11 (ARM not supported), macOS 10.14 to macOS 26; Intel Macs only up to macOS 15 | Price not stated on the page; 20-day trial, iLok account required, no dongle | “Zero latency” claimed for tracking, no figure given |
| Mastering The Mix RESO | Finds problem resonances and fixes them automatically; the page titles it a dynamic resonance suppressor and says it adds no phase distortion or transient smearing | Mac: AU, VST3, AAX; Windows: VST3, AAX; macOS 10.15+, Windows 10+ | £59.00 (shown in GBP when we read it); free trial | Not stated |
| Baby Audio Smooth Operator Pro | A spectral balancer that reduces build-up and harshness where frequencies exceed a threshold; linear phase | VST, VST3, AU, AAX; macOS 10.11+, Windows 10+ | Price not stated on the page; free trial | Not stated |
| TDR Nova | “A parallel dynamic equalizer” with dynamics in each band; the page names no dedicated resonance-suppression function | VST2, VST3, AU, AAX; Windows, macOS, Linux | A free version; paid versions not priced on the page | Not stated |
TDR Nova is in the table because it is the cheapest way to try the idea, but by its own description it is a dynamic EQ you set up by hand, not a tool that finds the resonances for you.
Where ENZYME is the wrong choice
- A fixed whistle or hum: a static notch is simpler and costs nothing in latency.
- Live monitoring: about 46 ms of reported latency suits mixing, not playing through the plug-in.
- Generation residue: shimmer and watery texture are not single peaks. ENZYME is not built for them.
How to test any of these fairly
- Choose a passage where the ring is audible and one where it is not.
- Match loudness before you compare, or use the tool’s delta or difference monitor if it has one.
- Listen to the removed signal. It should be the ring, not the vowel or the attack.
- Check notes that do not ring. A good suppressor leaves them alone.
- Try it on the mix bus at low depth if you plan to use it there; the effect differs from a single track.
Try ENZYME on the ring in your own track
A 14-day trial: VST3 and CLAP on macOS and Windows, Audio Unit on macOS.
Related guides
- Removing room resonance from vocals
- Snare ring removal
- AI music artifact removers compared
- What is an audio artifact?
Sources
- oeksound soothe3, oeksound.com/plugins/soothe3 (the soothe2 page redirects here), read October 20, 2026.
- Mastering The Mix RESO, masteringthemix.com/products/reso, read October 20, 2026.
- Baby Audio Smooth Operator Pro, babyaud.io/smooth-operator-plugin, read October 20, 2026.
- TDR Nova, tokyodawn.net/tdr-nova, read October 20, 2026.
- ENZYME specifications and manual, intrect.io/products/enzyme and the user manual.
FAQ
Is there a soothe2 alternative?
oeksound's soothe2 page now redirects to soothe3, so the same vendor's current product is the direct successor. Other dynamic resonance suppressors whose pages we read are RESO, Smooth Operator Pro and ENZYME. TDR Nova is a dynamic EQ rather than a dedicated suppressor.
Is a dynamic EQ the same as a resonance suppressor?
Not by the vendors' own descriptions. A dynamic EQ such as TDR Nova has dynamics in each band you place; a resonance suppressor such as soothe3, RESO or ENZYME finds the peaks itself. Which is better depends on the job, so try both on a ring that moves.
Will a resonance suppressor fix shimmer or watery AI vocals?
Not reliably. A suppressor reduces narrow peaks, while our guides describe generation residue as moving with the music. We have not evaluated that combination, and our measured comparison of artifact removers is a separate page. Test a short passage first.
Does ENZYME work the same on Windows and macOS?
Both platforms ship VST3 and CLAP; Audio Unit is macOS-only. We have not published a feature-by-feature comparison of the two builds. The Windows build is not code-signed yet, so SmartScreen shows a warning on first run.