SMOOTH / plugin 01

catch the resonances your EQ can't.

dynamic suppression across 40 ERB bands mapped to how your ear resolves frequency. SMOOTH rides each band independently and only acts when a resonance flares.

50 papers. 5 knobs. $29.

buy smooth / $29 try free demo read the docs
KERN SMOOTH plugin interface

in motion

watch SMOOTH work.

SMOOTH v1.3.3 with frequency-dependent spectrum smoothing, peak hold ghost line, and transient flash overlay. April 7 visual identity refresh still in place: editable EQ values, improved inline controls.

listen

hear the difference.

click play. each demo plays the original, then auto-switches to SMOOTH halfway through. click either box to toggle manually.

🎧 for best results, listen on headphones or studio monitors.

drums 0:00 / 0:00
vocal 0:00 / 0:00
vocal II 0:00 / 0:00
guitar 0:00 / 0:00
guitar II 0:00 / 0:00
mix 0:00 / 0:00
pad 0:00 / 0:00

explore the interface

see what you're hearing.

SMOOTH processing a vocal track in real time. the spectral display shows resonances being detected and tamed across the frequency range.

KERN SMOOTH processing a vocal track, spectral display showing dynamic resonance suppression

hover the numbered dots to explore the interface

features

what makes SMOOTH different.

01 / psychoacoustic precision

40 frequency bands mapped to how you actually hear. not arbitrary frequency splits.

02 / dual character modes

resonance mode for sustained harshness. transient mode for percussive spikes. switch or blend.

03 / M/S routing

process mid and side independently. tame center-panned vocals without touching the stereo field.

04 / spectral display

real-time visualization of what's being reduced. see the problem, see the solution.

specifications

the numbers.

4096-point FFT
40 ERB bands
under 3% CPU
32 factory presets
5 controls
$29 forever
VST3 / AU
zero-delay feedback filters
M/S processing

system requirements

macOS macOS 10.13+, Intel or Apple Silicon
windows Windows 10+, 64-bit
DAW any VST3 / AU compatible host

learn the science

understand what SMOOTH is doing.

free guides built from the same research behind the plugin. no paywalls, no courses to sell.

01

what is resonance

every signal chain has resonant frequencies. understanding them is the first step.

 04

how spectral processing works

FFT, frequency bins, magnitude and phase: the math behind SMOOTH.

 05

ERB scale and psychoacoustics

why SMOOTH uses 40 ERB bands instead of linear frequency bins.
all resonance guides →

go deeper

full documentation.

controls, presets, how the 5-stage pipeline works, quick start recipes, and keyboard shortcuts. everything you need to get the most out of SMOOTH.

read the docs

$29

one-time. yours forever.

buy smooth / $29 try free demo

or get all four for $59