--- title: "Spectrogram Editor and Noise Brush | AudioMultiCut Tools" description: "Brush noisy time and frequency areas on a spectrogram view and export adjusted audio." canonical: "https://audiomulticut.com/tools/spectrogram-editor" --- [AudioMultiCut](https://audiomulticut.com/) Tools [All AudioMultiCut toolsBrowse focused audio and video workflows.](https://audiomulticut.com/tools)[AudioMultiCutCut multiple audio segments from a long recording and export them in one pass.](https://audiomulticut.com/)[Remove parts from audioDelete unwanted sections, silence, mistakes, or dead air from an audio file.](https://audiomulticut.com/tools/remove-parts-from-audio)[Gain / normalize / compressionBalance loudness, raise quiet recordings, and tame peaks before sharing or exporting.](https://audiomulticut.com/tools/audio-volume-normalizer)[Audiogram makerTurn podcast clips, interviews, or voice notes into simple social-ready audiograms.](https://audiomulticut.com/tools/audiogram-maker)[Video multi cutCut multiple moments from long videos with the same fast multi-segment workflow.](https://audiomulticut.com/tools/video-multi-cut)[Remove parts from videoDelete unwanted video sections and export one joined local-browser edit.](https://audiomulticut.com/tools/remove-parts-from-video)[Spectrogram editor + noise brushFind noises visually and brush away clicks, hum, bumps, or background artifacts.](https://audiomulticut.com/tools/spectrogram-editor) [Open editor](https://audiomulticut.com/) # 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 Gain changeNew rectangles start with this gain. Negative values lower the selected band; positive values boost it.-18dB ## Export FormatMP3WAV stereoWAV mono 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 - 1Upload an audio file and wait for the spectrogram to render. - 2Find the visible problem and drag the smallest box that covers only that time and frequency area. - 3Choose Adjust, Soften, or Mute, then preview the edited result and the selected band before changing more. - 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. ![Spectrogram Editor showing selected noise areas on a frequency view.](https://audiomulticut.com/_next/image?url=%2Farticle-screenshots%2Ftools-spectrogram-editor.jpg&w=1600&q=75&dpl=dpl_2JMPia5CMxdedvqoVqs9b5z7XM4q) ### Related guides [Best Use Cases for a Spectrogram Editor and Noise Brush When a spectrogram editor helps: clicks, hum, bumps, squeaks, coughs, and short noises that are easier to see by frequency than edit on a waveform.](https://audiomulticut.com/articles/spectrogram-editor-use-cases)[Clean Clicks or Hum Before Normalizing Audio Use the spectrogram editor for visible clicks, bumps, or hum lines before importing the cleaned export into the volume normalizer.](https://audiomulticut.com/articles/spectrogram-cleanup-before-normalizing-audio)[Best Spectrogram Editor Alternatives for Noise Repair Compare AudioMultiCut's spectrogram editor with iZotope RX, Audacity spectrogram workflows, Adobe Audition, DAWs, and simple noise reducers.](https://audiomulticut.com/articles/best-spectrogram-editor-alternatives)[How to Combine AudioMultiCut Tools Without Making the Edit Messy A practical workflow for using the cutter, remove-parts editors, normalizer, audiogram maker, video tools, and spectrogram editor together without losing track of the job.](https://audiomulticut.com/articles/combine-audio-tools-workflow) [AudioMultiCut](https://audiomulticut.com/) Free online audio cutting tools for splitting, cleaning, and preparing recordings in the browser. © 2026 AudioMultiCut. 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