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SMOOTH

Resonance Suppressor Plugin by KERN audio
MyKVRFAVORITE2WANT3
$29
kernaudio.io
SMOOTH
SMOOTH
SMOOTH by KERN audio is a Virtual Effect Audio Plugin and a Software Application for macOS and Windows. It functions as an Audio Units Plugin, a VST 3 Plugin and a Standalone Application.
Product
Version
1.4.0
Sys Reqs
Windows 10+, 64-bit, any VST3 compatible host
Product
Version
1.4.0
Sys Reqs
macOS 10.13+, Intel or Apple Silicon, any VST3 / AU compatible host
Tags:Resonance SuppressorDe-esserDynamic EQEQKERN audioSmoothSpectral ProcessingUniversal 2 Binary
Effect
Formats
Copy Protection
Serial Number
Smooth Reese ProcessedSmooth Reese DrySmooth Pad ProcessedSmooth Pad DrySmooth Pad 2 ProcessedSmooth Pad 2 DrySmooth Guitar ProcessedSmooth Guitar DrySmooth Drums ProcessedSmooth Drums DrySmooth Bass ProcessedSmooth Bass Dry

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8 KVR members have added SMOOTH to 5 MyKVR groups 8 times.

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KVR Rank

Overall: 2033   1766   1946

30-Day: 7532; 7-Day: 7053; Yesterday: 26434

Dynamic resonance suppressor that hears frequencies the way you do. SMOOTH uses a 4096-point FFT split across 40 psychoacoustic ERB bands to find and tame harsh resonances in real time. One knob gets you 80% there. Five knobs get you all the way.

Features:

  • 40 ERB frequency bands mapped to human hearing perception.
  • Dual character modes: Resonance (sustained harshness) and Transient (percussive spikes).
  • Mid/Side processing for independent mid and side treatment.
  • Real-time spectral display showing what's being reduced.
  • 32 factory presets.
  • Under 3% CPU at 44.1kHz.

$29 one-time. No iLok. No subscription. No account required. Yours forever.

Latest User Reviews

Average user rating of 5.00 from 2 reviews
Read all reviews Add A Review
SMOOTH

Reviewed By MCCdusk [all]
March 26th, 2026
Version reviewed: 1.2.1 on Mac

SMOOTH is a very interesting professional resonance suppressor for macOS and Windows with many usefull functions and a highly intuitive interface with a lot going on under the hood. It's M/S capabilities turned out to be very effective in precisely smoothing out harsh resonances from center-panned sources, a feature I was missing in many other resonance suppressors. Mid and side can be processed fully independent, which makes KERN-SMOOTH an ideal tool for mix & mastering purposes.

Response from kernaudioio from KERN audio on March 27th, 2026

thank you so much for the detailed review. the M/S processing was one of the things i spent the most time on during development, so hearing it's filling a gap for you is really satisfying. mastering use cases like that are exactly what i had in mind.

will keep on updating and improving, thanks mate.

Read Review
SMOOTH

Reviewed By fisherKing [all]
March 5th, 2026
Version reviewed: 1.0 on Mac

just added both 'smooth' and 'warm'(well-named plugins!) to my arsenal; both are excellent tools, great at what they do. my fave is smooth; it has a tasteful, informative GUI, and works well with resonances, the way something like soothe2 does.. but for a fraction of the cost.

it's a no-frills plugin, but that's kinda my preference. and it's stable (logic pro 12). both plugins are highly-recommended.

Response from kernaudioio from KERN audio on March 27th, 2026

really appreciate the kind words on both plugins. and glad SMOOTH holds up well next to soothe2 in your workflow. stable on Logic 12 is good to hear too, that's useful feedback mate.

Read Review

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