Spectral Editor Online
Erase a cough, hum, click, or beep by drawing a box on the spectrogram — right in your browser. Preview the edit against the original, then download — no sign-up, and your audio is never uploaded.
How to Remove a Sound on the Spectrogram
See it, box it, preview it — three steps on your own device.
Drop Your Audio
MP3, WAV, M4A, FLAC, OGG, or AAC, up to 200 MB. It decodes in the browser and draws the spectrogram.
Box the Sound
Find the bright shape that matches the noise — a vertical streak for a cough or click, a horizontal line for hum — and drag a box around it.
Preview & Download
A/B against the original, adjust the attenuation, then apply — the edited 192 kbps MP3 downloads instantly.
Why Notevibes Spectral Editor
Frequency-domain editing without installing anything.
See the Sound
Time runs left to right, frequency bottom to top, loudness as color — so a cough, hum, or click shows up as a bright shape you can target.
Box & Attenuate
Drag a box around the unwanted sound and turn down just that time and frequency region — from a gentle -3 dB to full removal.
Live A/B Preview
Hear the original against your edit before you commit. What you preview is exactly what downloads.
Never Uploaded
The spectrogram, the preview, and the final render all run in your browser. Your recording never leaves your device.
Any Common Format
MP3, WAV, M4A, FLAC, OGG, and AAC files up to 200 MB. The edit exports as a clean 192 kbps MP3.
Free, Anywhere
No watermark, no sign-up, no limits. Works on phones, tablets, and laptops in any modern browser.
Nothing to Upload, Nothing to Leak
The spectrogram, every preview, and the final render happen on your own device. Your file never touches a server — a stronger promise than any “we delete it later”.
No Upload
Analysis and rendering run on your device
No Account
Start editing immediately
No Tracking
We never see or hear your audio
What People Erase
Best for one-off blemishes in otherwise clean audio.
Cough Over Speech
Draw a box on the spectrogram around the cough and erase it without cutting the sentence
Mains Hum (50/60 Hz)
Remove the thin horizontal hum line running through a recording
Mouth Clicks
Lift the short click streaks out of voiceover and narration
Phone Beep in a Take
Take out a stray notification without redoing the recording
Chair Squeak or Bump
Attenuate a one-off squeak or desk knock mid-take
Whistle or Whine
Notch out a narrow-band whistle or electronic whine
Erase One Sound, Keep Everything Else
It’s always one sound that ruins the take. A cough in the middle of the best sentence, a phone beep, a hum you only noticed after packing up. Cutting it out of the timeline takes the words with it; re-recording means losing the performance. Spectral editing is the third option: the sound becomes a shape on a picture, and you erase the shape.
Editing a picture of your audio
The spectrogram lays your recording out with time running left to right and frequency bottom to top, loudness as brightness. A cough is a tall vertical streak. Mains hum is a thin horizontal line. A click is a needle. Drag a box around the shape, choose how hard to turn it down — a subtle -3 dB or full removal — and the speech around and even underneath it carries on untouched.
Hear it before you commit
Every edit can be previewed A/B against the original, so you know the cough is gone and the voice still sounds natural before anything downloads. This kind of frequency-domain repair is the same technique professional audio restoration suites are built on — here it runs in a browser tab, and what you preview is exactly the 192 kbps MP3 you get.
Free and private, all the way through
The spectrogram is computed on your device, the preview plays on your device, and the render happens on your device. Your recording is never uploaded, which is why there is no queue, no account, and no watermark. Files up to 200 MB.
The right tool for the right noise
A spectral editor is a scalpel — perfect for one-off sounds, wrong for noise spread across the whole file. For steady hiss, hum, or fan noise under everything, the noise remover subtracts it in one pass. For dead air between sentences, the silence remover tightens the whole take. And when a file needs several kinds of repair, the online audio editor includes this spectral editor alongside multi-track editing and effects.
Need More Than One Fix?
The full Notevibes editor includes this spectral editor plus multi-track editing, effects, and AI cleanup — then exports to MP3 or WAV.
Free to try · No credit card required
Related Audio Tools
More free AI audio tools from Notevibes — same engine, no sign-up.
Vocal Remover
AI-extract the instrumental and acapella from any song.
AI Stem Splitter
Split any song into vocals, drums, bass, and other.
Silence Remover
Cut silent gaps, auto-trim edges, or split at silence.
Voice Recorder
Record audio from your microphone in the browser.
Online Audio Editor
Multi-track browser editor with every tool built in.
Audio Normalizer
Boost audio to peak volume without clipping.
Spectral Editor FAQ
What is spectral editing?
Spectral editing works on audio in the frequency domain instead of the timeline. The tool shows a spectrogram — time left to right, frequency bottom to top, loudness as color. You draw a box around an unwanted sound and only those frequencies, during only that moment, are turned down. Everything else stays untouched.
What sounds can I remove with a spectral editor?
It excels at isolated blemishes in otherwise-clean audio: a cough or throat-clear over speech, a mouth click, a 50/60 Hz mains hum, a single beep, a chair squeak, or a bird chirp. It is not meant for dense music, where any box would overlap the music itself.
How do I find the sound on the spectrogram?
Coughs and clicks appear as bright vertical streaks at the moment they happen. Hum and whine appear as steady horizontal lines at a fixed frequency. Find the bright shape that lines up with the time you hear the problem, box it, and use the preview to confirm before applying.
How is this different from a noise remover?
A noise remover subtracts a steady background-noise profile across the whole file. A spectral editor targets one specific sound at one specific time and frequency — ideal for the one-off blemishes a noise remover cannot touch.
Should I use it on music?
It works best on clean speech or sparse audio where the unwanted sound is isolated. On a dense music mix there is no isolated shape to lift — a box would also remove part of the music — so it is less useful there.
Is my audio uploaded to a server?
No. The spectrogram, preview, and final render all run in your browser using the Web Audio API and an in-browser FFT. Your file never leaves your device.
Is the spectral editor free?
Yes — completely. Because the processing runs on your device rather than our servers, there is nothing to gate: no watermark, no sign-up, no limits. Files up to 200 MB.
Can I make more than one edit?
Yes — draw as many boxes as you need before applying, and set how strongly each pass attenuates, from a subtle -3 dB dip to full removal. The result downloads as a 192 kbps MP3.