Targeted cuts
24 shared positions for Manual, learned Fixed and adaptive Live notches. Automatic processing only cuts; it never raises the master gain.
NORMSONIC / FEEDBACK GUARDMore control.
More control.
Less ringing.
Identify narrow ringing frequencies and apply precise cuts. FEEDBACK GUARD combines hands-on notch EQ with deliberate fixed learning and adaptive live assistance, in one clear interface.
Windows x64 · VST3 + StandaloneFree personal & commercial audio useZero declared plugin latency
24stable filter slots
3manual & assisted modes
192automatable parameters
16factory starting points
Precision where it mattersSee the evidence.
See the evidence.
Keep the decision.
For master and monitor buses, speech systems and precise resonance control. Fixed and Live filters have distinct roles; Manual slots let you choose the frequency, depth and bandwidth yourself.
Visible processing
Real input/output FFT, applied left/right filter response, meters and filter activity history. Requested Manual handles are visibly separate from the applied filter bank.
Deliberate actions
Learning starts only when you press LEARN. Stop retains Fixed filters. Clear Fixed and Clear Live are separate, and removal actions require confirmation while output is active.
Detection is heuristic: a sustained musical tone can resemble feedback. Software and simulated-loop tests do not replace checking your actual microphones, loudspeakers and room.
WorkflowsChoose your level
Choose your level
of assistance.
Manual settings, fixed learning and live recovery are separate workflows. Use only the assistance you need.
01 / MANUAL
A notch you control
Select a slot, enable Manual, then set frequency, cut and Q. Drag the hollow graph handle or type physical values. Enable Dynamic when the cut should respond to the local signal level.
02 / LEARN FIXED
Learn, then keep it fixed
Choose Learn Fixed and press LEARN deliberately while checking the system at controlled levels. The detector evaluates persistent narrow candidates. Press STOP to retain learned cuts; changing a preset never starts learning. No test tone is generated.
03 / LIVE ASSIST
Adapt when the path changes
Live Assist assigns adaptive cuts within your filter budget. Hold and Recovery control their return as evidence decays. Freeze Live converts existing Live filters to Fixed; Clear Live leaves your Manual and Fixed filters intact.
ListenHear the cut.
Hear the cut.
Follow the same signal.
Compare the original and processed signal at the same playback position. Examples demonstrate the actual filter engine; each example explains its source and settings.
Switch Plugin OFF / ON while playback continues. Start at a comfortable listening level.
Loading audio comparisons…
The synthetic tones in these open-loop examples are deliberately added to music and vocals. They are not recordings of a physically qualified microphone/loudspeaker system. Separate numerical closed-loop tests are engineering evidence; these listening examples demonstrate filtering, not proof of room protection.
ControlsPrecise controls.
Precise controls.
Visible results.
Physical units, typed values, graph editing and explanatory tooltips. Every stored control can be automated by the host.
Signal & bypass
Input and Output trim, wet/dry Mix and exact bypass. The graph shows the wet filter response; trims and Mix are separate.
Detector evidence
Sensitivity, Noise Floor, frequency bounds, Persistence, Prominence, Growth and Harmonic Guard help constrain candidate admission.
Automatic cut geometry
Auto Depth limits automatic attenuation; Auto Q sets notch width. Fixed and Live limits share the same 24 stable positions with Manual filters.
Manual dynamics
Each Manual slot has its own frequency, cut, Q, Dynamic switch, Threshold and Release. Dynamic Knee is shared. Disabled controls retain their values.
Live hold & recovery
Attack smooths cut activation. Cooldown spaces automatic admissions. Live Hold and Recovery govern adaptive filter release.
Linked stereo / dual mono
Linked Stereo shares new detection and filter assignments. Dual Mono detects and filters channels independently. Previously learned channel assignments are retained.
Spectra & applied response
Input/output FFT, applied L/R response, bank types, cuts, confidence and meters show actual engine data. Analyzer Off disables the FFT display, not necessarily detection.
Presets, A/B & saved filters
16 factory starting points plus A/B and Copy. Stored controls and the learned bank are saved together. Learn, Stop, Clear and Freeze are deliberate actions rather than continuous automation parameters.
Help
A clear first setup.
Begin with Manual or a conservative starting point. Confirm the signal path and watch the real response before relying on automatic assistance.
Install in your DAW
- Unzip the Windows package into a local folder and read the included installation guide.
- Run the included Install.ps1 to install in %LOCALAPPDATA%/Programs/Common/VST3, add that folder to your DAW scan paths and rescan. You can also copy the entire FEEDBACK GUARD.vst3 bundle manually to your chosen VST3 folder.
- Insert FEEDBACK GUARD on the intended master or monitor bus. Start with controlled levels and check which channels feed that bus.
The Standalone application is also included. Device and buffer settings determine system latency; zero plugin PDC does not mean zero hardware latency.
Does it guarantee feedback-free sound?
No. The detector evaluates spectral evidence and can react to sustained musical tones. Real acoustic feedback depends on the room, microphone placement, speakers, gain and routing. Keep physical setup and gain management under control. This release has not been qualified across physical venues.
Does it generate a sweep or measure the room?
No. FEEDBACK GUARD does not generate test signals or automatically increase gain. Room-response measurement and correction belong to a separate workflow.
What does zero declared latency mean?
The causal notch signal path has no lookahead and reports zero added audio samples to the host. FFT observation and persistence take time to collect evidence; they are detector response time, not audio buffering. Your interface, host and other plugins still add latency.
Are learned filters saved?
Controls and learned filters are included in plugin state and A/B banks. Learning is a deliberate runtime action and does not resume automatically when you load a preset or session.
How do Manual dynamic notches work?
Enable Manual and Dynamic for a slot, choose its frequency, requested cut and Q, then set its Threshold and Release. The cut follows energy near that frequency. It is not a broadband gate or a compressor that boosts the signal.
Is there a macOS version?
This release is Windows x64 only. A macOS download is not currently offered.
Free Windows release · v0.1.0Your next
Your next
precision tool.
Free compiled Windows package with VST3, Standalone, instructions and license notices. Use it in personal or commercial audio work.
Check the included release notes for the tested host and known limitations. Physical room performance must be checked with your own system.
Free to use
Personal and commercial audio use is free. This is a compiled-only distribution; NORMSONIC source code is not offered for download. The included license and third-party notices apply.
Questions or unexpected behaviour? Write to info@normsonic.com with your host, Windows version and steps to reproduce.