Purix
Intelligent Auto-EQ & 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.
AU
VST3
Standalone
macOS
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
- Architecture Apple Silicon + Intel (Universal Binary)
- Formats AU, VST3, 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.