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Spectrogram editor + noise brush

Find visible problem areas, draw a rectangle over the time and frequency area, and export a cleaned version.

Preparing the audio engine...

New brush default

Export

Brushed areas

0

Total: 00:00.000

How to use Spectrogram editor and noise brush

Use this when a problem is easier to see by time and frequency than on a normal waveform. It is for targeted repairs: clicks, hum lines, bumps, squeaks, short cough edges, or narrow tones.

What to click

  1. 1Upload an audio file and wait for the spectrogram to render.
  2. 2Find the visible problem and drag the smallest box that covers only that time and frequency area.
  3. 3Choose Adjust, Soften, or Mute, then preview the edited result and the selected band before changing more.
  4. 4Resize the box if needed, repeat for other visible problem areas, then export the cleaned audio.

Best use cases

  • Reducing a click, bump, squeak, plosive thump, or brief scrape without deleting time.
  • Lowering a narrow hum, whistle, or tone that appears as a line on the spectrogram.
  • Cleaning specific visible trouble spots while preserving nearby speech or music.
  • Checking whether a sound is actually isolated enough to repair before using a heavier restoration tool.

Control guide

New brush default

Sets the starting gain for new boxes.

  • Default: -18 dB.
  • Range: -36 dB to +18 dB.
  • Affects: new brush boxes only.
Adjust

Uses the Gain setting for that box.

  • Default mode for new boxes.
  • Best for: exact cuts or boosts, like lowering a hum band.
Soften

Gently reduces the selected area.

  • Preset target: moderate reduction.
  • Best for: bumps, harsh consonants, squeaks, overlap with speech.
Mute

Turns the selected area down as far as possible.

  • Preset target: very strong reduction.
  • Best for: isolated clicks, beeps, narrow tones.
Gain

Controls how much Adjust mode changes the selected band.

  • Default: copied from New brush default.
  • Range: -36 dB to +18 dB.
  • Negative lowers; positive boosts.
Strength

Controls how much of the edit is applied.

  • Default: 100%.
  • Range: 0% to 100%.
  • Lower it when the repair sounds obvious.
Feather

Smooths the start and end of the brush in time.

  • Default: 18 ms.
  • Range: 0 ms to 120 ms.
  • More feather reduces edge clicks but touches more audio.
Band focus

Controls how tightly the edit follows the selected frequency band.

  • Default: 1.0x.
  • Range: 0.4x to 3.0x.
  • Higher is narrower; lower is softer and wider.
Play edited result

Plays the selected time range after the brush.

  • Affects: playback only.
  • Use it to check whether the repair works in context.
Play edited inside

Plays mainly the edited frequency band.

  • Affects: playback only.
  • Use it to check whether the box targets the right sound.
Format

Chooses the exported file type.

  • Default: MP3.
  • Options: MP3, WAV stereo, WAV mono.
  • Use WAV stereo if the original stereo image matters.
When this is not the right tool: If the whole recording is noisy, clipped, distorted, or badly recorded, this brush is not a one-button rescue. Use a restoration suite or full editor for broad repair work.