Purix

Automatic Resonance Removal

"Detects and removes resonances in real time using FFT analysis, five processing modes, and a one-click Learn system — transparent correction without guesswork."

Harsh peaks, muddy buildup, and boxy resonances hide in every mix — and hunting them down by ear eats hours. Purix analyzes your audio in real time with FFT-based spectral detection, finds problematic resonances the moment they spike, and applies fast per-bin dynamic gain reduction exactly where and when they occur — then releases the instant the resonance subsides. Clean, transparent correction that never touches your source tone.

Purix — Automatic Resonance Removal — plugin interface for Mac and Windows
Download Free All Plugins Try Purix Raw (Free)
AU VST3 CLAP AAX Standalone macOS Windows

FEATURES

Spectral Processing Engine

◆Overlap-add FFT engine with 75% overlap and Hann windowing for smooth spectral processing
◆Selectable FFT resolution — 1024 (Eco), 2048 (Standard), or 4096 (High) samples via the Quality control, with latency reported to the host per mode
◆Per-bin dynamic reduction — independent attack/hold/release smoothing on every frequency bin, measured against a rolling time-average and local spectral average
◆8-frame temporal smoothing — a rolling magnitude history steadies detection and prevents false triggers from transient content
◆Parabolic peak interpolation — a 3-point quadratic fit locates each resonance to sub-bin frequency accuracy
◆3 dB threshold hysteresis — a gap between activation and deactivation keeps resonance groups from flickering at the boundary

Five Processing Modes

◆Clean — broadband correction for general cleanup
◆Vocal — tuned for sibilance and vocal harshness
◆Drum — targets boxiness and ring on percussion
◆Master — gentle profile for mix bus and mastering
◆Harmonic — Yin pitch detection places suppression between harmonics; MIDI Pitch Override feeds notes for exact tracking

Detection & Envelope

◆Depth and Sensitivity — set how much reduction is applied and how far above the surrounding spectrum a peak must rise before it's treated as a resonance
◆Speed (Slow / Medium / Fast) and Complexity control detection response across the spectrum
◆Full envelope control — Attack (0.1–50 ms), Hold (0–500 ms), Release (5–1000 ms), plus Auto Hold that scales hold time per frequency
◆Low Cut and High Cut restrict processing to a chosen band; De-Esser Link ties sibilance handling into detection

Learn / Cleanse System

◆One-click Learn runs a 5-second forensic analysis of your audio, then sets Depth, Sensitivity, mode, and band for you — with a teal progress ring and a spectral shadow tracing the profile it captures
◆Punch (P) — deprioritizes sub-100 Hz and above 12 kHz to protect kick weight and hi-hat air
◆Aura (A) — emphasizes the 800 Hz–8 kHz band to target vocal harshness and lead resonances
◆Final (F) — linear weighting with a conservative 50% depth cap, safe for the master bus (default profile)
◆Learn auto-picks the processing mode, applies a 12 dB safety clamp, skips silent input, and offers one-click Undo to restore your pre-learn settings

Output & Workflow

◆Mix (dry/wet), Output trim (−12 to +6 dB), and Auto Makeup level compensation
◆Delta monitoring, Frequency Solo, Before/After freeze, and A/B comparison of two full parameter states
◆Unmask sidechain ducking and 19 factory presets
◆Cleanup Seed — an 8-character base36 code captures 6 key settings (Depth, Sensitivity, Speed, Mode, Low Cut, High Cut); copy and paste to share or restore a snapshot

FACTORY PRESETS

Init
Gentle Cleanup
Remi Blaze Purix
Vocal De-Harsh
Vocal De-Ess
Drum De-Box
Drum De-Ring
Guitar Tamer
Bass Cleanup
Mix Bus Polish
Master Smooth
Harmonic Vocal Clean
Harmonic Deep Clean
Harmonic Instrument
The Mud-Killer
Sibilance Surgeon
FM Lead Tamer
Master Glue
Sub-Stabilizer

SYSTEM REQUIREMENTS

  • OS macOS 15.0 (Sequoia) or later · Windows 10 or 11 (64-bit)
  • Architecture Apple Silicon + Intel (Universal Binary) · x64 on Windows
  • Formats macOS: AU, VST3, CLAP, AAX, Standalone. Windows: VST3, CLAP, Standalone
  • MIDI Accepts MIDI input for Harmonic mode pitch override
  • Access Free — no account required

DOWNLOAD FREE

Purix is free — no account, no wallet, no strings. Download the installer and drop it in your DAW.

Download Free All Plugins

Licensed under the Freeware License.

FREQUENTLY ASKED QUESTIONS

Is Purix free?

Yes. Purix is completely free, with no account, no subscription and no trial period. Purix Raw is the one-knob version if you want something even simpler.

Does Purix run on Apple Silicon and Windows?

Yes. Purix is a Universal Binary that runs natively on Apple Silicon (M1/M2/M3/M4) and Intel Macs, and it also ships as a 64-bit build for Windows 10 and 11.

Which formats and systems does Purix support?

AU, VST3, CLAP, AAX and a Standalone app on macOS 15.0 or later, as a Universal Binary for Apple Silicon and Intel Macs. VST3, CLAP and a Standalone app on Windows 10 and 11, 64-bit. AAX ships on macOS only.

How do I install Purix?

On macOS, double-click the .pkg installer and follow the prompts; it installs every format at once. On Windows, run the .exe installer. The macOS build is code-signed and notarized by Apple and the Windows build is Authenticode signed, so neither needs a security override. No dongle and no extra account.

How is Purix different from Purix Raw?

Purix Raw is the one-knob version: the same engine behind a single macro, with the detailed controls hidden. Purix gives you the full control set.