Resonance Suppressor
Find the frequencies that stick out, and turn them down only while they do.
Load a track and the Resonance Suppressor scans it frame by frame for regions that rise above their surroundings, then reduces them by a bounded amount for as long as they stick out. The display shows where in the spectrum, when in the track and how much, all measured from your file. Compare with the original, listen to exactly what was removed and download the result. Nothing leaves your device.
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DROP YOUR TRACK
or click to choose a file
WAV, MP3, AIFF or FLAC, up to 8 minutes. Everything happens in your browser: the file is not uploaded and nothing is stored. Privacy notice.
Where and when: reduction by frequency over time
Vertical: frequency (low at the bottom). Horizontal: time. Darker means more reduction at that moment. Click or drag to jump to a spot.
Starting points
Controls
Download
The download is the exact audio you are hearing in Processed — the same processing, the same settings, 24-bit WAV. It is created in your browser, so there is no upload and no wait for a server.
Measure, compare, reduce a little, check
- Scan. The track is split into short overlapping frames and each frame's spectrum is measured.
- Compare with the surroundings. A smoothed copy of each frame's spectrum is compared with the average level around it. A region that sticks out by more than the Sensitivity threshold is a candidate.
- Reduce, with limits. Candidates are turned down by an amount that grows with how far they stick out, never more than Reduction, and only between the Low and High limits. Attack and Release smooth how the reduction moves.
- Check. Switch between Original, Processed and Delta. The spectrum shows the average before and after, and the map shows every moment of reduction.
The map, the numbers and the region markers are measurements of your file and the processing applied. The notes about what a frequency region “often relates to” are a general guide, not a diagnosis: whether a peak is a problem is a decision for your ears.
Where to start
The presets only set the controls above to cautious positions. They do not analyse your material and they are not guaranteed to suit it. Start with a low Reduction, play a section, then look at Delta: if it sounds like the harshness or boxiness you wanted gone, you are in the right place; if it sounds like pieces of the music, back off.
Gentle Cleanup
Small, slow moves across the whole range.
Vocal Harshness
Upper-mid and presence region, moderate depth.
Boxy / Muddy
Low-mid region, slower release so it does not pump.
Strict Resonances
Narrow detection, higher depth, full range.
Related tools
For a fixed tonal change, use EQ Studio. For harsh “s” sounds specifically, use the De-Esser. To see where a track's energy sits before you decide, use the free Frequency Analyzer.
Questions
How is this different from an EQ?
An EQ turns a frequency range up or down all the time. The Resonance Suppressor measures every few milliseconds which parts of the spectrum stick out above their surroundings and turns only those down, only while they stick out. When a peak goes away the reduction goes with it. That is why the heat map changes over time instead of showing one fixed curve.
Is my track uploaded?
No. The file is decoded, analysed, processed, played and encoded to WAV in your browser. Nothing is sent to our servers.
Will the download sound like the preview?
Yes. Processed is a fully rendered version of your track and the download is exactly that audio as a 24-bit WAV. The Match loudness switch only changes how loud the Processed side plays while you listen.
What do Sensitivity, Selectivity and Reduction do?
Sensitivity sets how far a region has to stick out above its surroundings before it is reduced. Selectivity sets how narrow the regions are that it looks for. Reduction is the most any region may be turned down. The Low and High limits keep the processing out of ranges you do not want touched.
Does it find problems automatically?
It finds spectral peaks that stand out from their surroundings in your file, and it shows you where, when and by how much. It cannot know whether a peak is a fault or part of the sound you want. A resonant bass note or a bright cymbal may be exactly what the track needs. Use Delta to hear what was removed and decide.
What can go wrong?
Strong settings can leave a hollow, filtered or slightly watery sound, and fast Attack on percussive material can soften transients. Start gentle, use Delta to check that mostly the problem was removed, and compare at matched loudness. Files are limited to 8 minutes in the browser.
Is this AI?
No. It is conventional spectral processing: a short-time Fourier transform, a comparison of each region with its surroundings, a bounded gain mask with attack and release, and overlap-add resynthesis. The presets only set the visible controls.