Warmth, measured.

Twenty audio plugins, built the way we keep hardware alive: listen, measure, then adjust.

Free 7-day trial · One payment, yours to keep · 4 free plugins

Twenty instruments.
One bench.

Optical, FET and VCA dynamics. EQ that moves only when it must. Saturation, space and pitch. Eight suites built from the same engines.

Heritage. Precision. Suites.

Porcelain fronts for the classic circuits, black glass for the instruments you need to see, racks of modules for whole jobs.

See the catalog

KO-2A

KM-01 · Opto Comp. The slow, singing glow of a tube optical leveler.

Open it up.

Every Kelvinmoor plugin is laid out the same way: presets, compare and SCAN on top, the instrument in the middle, your levels at the bottom. Underneath, a circuit model, not a static curve.

Meet KO-2A

Watch the bench at work.

What the plugins do, how SCAN listens, and why every number on screen is there for a reason.

A second pair of ears.

Press SCAN and play the track. It listens for a few seconds, measures what an engineer would measure, and proposes a starting point you apply with one click.

Every move comes with its reason, in one line. You can keep it, change it, or ignore it. It is a starting point, not a verdict.

  • LUFS
  • Crest factor
  • Spectrum by band
  • Tilt
  • Sibilance
  • Resonances
  • Pitch range and key
  • Transients
  • Low end
  • Stereo width

Scan your vocal for free. PILOT LIGHT writes the report and points each finding to the plugin that fixes it.

SCAN · ISOTHERMListening

Play a representative section for about twelve seconds. Connect a reference to the sidechain to match it.

Source
Vocal
Lowest note
120 Hz
Spectral tilt
−3.1 dB/oct
Strongest resonance
+7.5 dB at 2.9 kHz

Recommended

  • Low cut 74 Hz, 18 dB/oct: below the voice
  • Dynamic cut at 2.9 kHz, up to 5.5 dB: a resonance 7.5 dB above its neighbors, only while it rings
  • Air band at 10 kHz, +2.0 dB: the top octave sits about 4 dB under typical vocals

Example readout. The values depend on your material.

One price.
Yours to keep.

  1. Try it for 7 days, with everything working.Download, install, open. No card, no countdown on half the features.
  2. Hear it on your own music first.All sales are final, so the full trial comes first: every control, SCAN and presets, for 7 days. Terms
  3. Pay once. Yours on your computer.Each serial is active on one computer at a time; moving it to a new one takes a click. Works offline for up to 45 days between checks. Every version 1 update included.
  4. The launch price is the only sale.After launch, prices go to list and stay there. No countdowns, no 90 % off.

The catalog.

Twelve single plugins and eight suites. Each one does a job you already know, with SCAN on the front.

All twenty.

All twenty plugins. Every update in version 1. Bought one by one at list price they add up to $2,050.

List price $599−50%, now $299Launch price

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Add two plugins and save 15%. Up to 45% off with ten or more.

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    Every plugin runs free for 7 days. When you are ready, pick two or more and the discount applies by itself.