Gentle
Keeps more of the original tone. Start here for light hiss and quiet rooms.
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Noise Reduction Explained: Settings That Keep Voices Natural
AI noise reduction lowers the steady sound under a voice while keeping its tone. The trick is choosing a pass that is strong enough and stopping there.
By Priya Shah · Updated
What noise reduction actually removes
Every recording has a noise floor, the quiet sound you hear between words.
Steady noise
Hiss, hum and fan rumble sit at one level, so the model can learn and lower them.
The voice
Speech and singing change every moment, so they stay in front.
The tradeoff
The stronger the pass, the more fine detail goes with the noise.
Gentle or Deep clean
Two strengths cover most recordings.
Deep clean
Pulls harder on heavy noise. Use it when Gentle leaves the noise in front.
Settings by recording
Match the pass to what you hear.
| Recording | Start with | Then |
|---|---|---|
| Quiet room voice memo | Gentle | Done |
| Podcast with fan or air conditioning | Gentle | Deep clean if the whoosh still leads |
| Tape or old mic hiss | Deep clean | Compare with Gentle on the quietest part |
| Guitar amp hum | Deep clean | Check sustained notes for softening |
| Echo in a bare room | Dereverb | Denoise afterwards if hiss remains |
Apply noise reduction in two steps
Both steps run as noise reduction online in your browser.
1. Run a Gentle pass first
Open Denoise, upload an MP3, WAV, M4A or FLAC file and start with Gentle. Pick Deep clean only when the noise still leads.
2. Treat room echo as a separate job
Echo is space, so it needs Dereverb. Pick Room recording for small rooms and Full song or Vocals only for the output.
After the cleanup
Each tool picks up where noise reduction stops.
Noise reduction questions
Is there free noise reduction?
Yes. You can try AI noise reduction free in your browser on MusiCraft and compare Gentle with Deep clean on your own file. It is free AI noise reduction you can run from a phone too, so noise reduction online free fits quick fixes on the go.
Why does my voice sound like it is underwater?
The pass was too strong for the recording. Go back to Gentle and accept a little quiet hiss, which listeners barely notice.
Does noise reduction remove echo?
Echo is room sound, a different job. Run Dereverb after Denoise for rooms that ring.
Which noises respond best?
Steady sounds such as hiss, hum, fan rumble and air conditioning. Sudden sounds such as a door slam are best cut by hand.
Should I clean before or after mastering?
Before. Clean first, then master, so the loudness stage works on the cleaned audio.
Which formats can I upload?
MP3, WAV, M4A and FLAC.
Hear your voice with less noise
Upload one recording, start Gentle and let noise reduction do just enough.