How to Remove Background Noise in DaVinci Resolve

Quick answer: Drag the free Noise Reduction plugin from Fairlight FX onto the noisy clip, switch it to Manual, then use Learn on a clean section of just the noise before anyone speaks. That handles hiss, hum, and steady room noise on the free version. For a harder case, DaVinci Resolve Studio's Voice Isolation runs the separation through the DaVinci Neural Engine instead, at the cost of a $295 Studio license if you don't already own one.

I recorded a 34-minute sit-down interview in a rented apartment last spring, and the refrigerator compressor kicked on halfway through the second take. Nobody caught it on set, headphones or not. By the time the footage landed in Resolve, I had two options: reshoot, or fix it in Fairlight. Reshoots aren't free, so this is the chain I actually used, and it's the same chain that works whether your problem is a fridge, an air conditioner, a fan, or steady room tone. If your problem is room reverb rather than background noise, treat that as a separate issue: noise reduction can lower the noise floor, but it won't remove the sound of the room itself.

Which DaVinci Resolve Noise Removal Tool Should You Use?

Start here before you touch any plugin. Different noise problems need different tools, and reaching for the wrong one is why so many noise reduction attempts end up sounding worse than the original recording.

Problem	Use this first	Why
Steady hiss, fan, fridge, HVAC	Noise Reduction FX in Manual + Learn	It can learn a constant noise print and reduce matching noise.
Traffic, wind, crowd, mixed background	Voice Isolation in Studio	AI separation handles changing noise better than a static noise profile.
Noise only between words	Gate in Dynamics	A gate mutes gaps. It doesn't remove noise under speech.
50/60 Hz electrical hum	De-Hummer	Hum sits at predictable power-line frequencies and their harmonics.
Low-end rumble	High-pass EQ around 80 Hz	Cutting rumble first makes later cleanup less destructive.

DaVinci Resolve Noise Reduction FX for Free-Version Background Noise Cleanup

The tool you want is called Noise Reduction, and it lives under Fairlight FX in the Restoration category. On the Edit page, open the Effects Library, then Audio FX, then Fairlight FX, and drag Noise Reduction onto the clip. On the Fairlight page, it's faster to open the Mixer, click Effects on the channel strip, and add it from there. Both paths load the same plugin. Most tutorials only show one of the two, which is why people searching for "noise reduction" on the wrong page assume the free version doesn't have it.

Inside the plugin you'll find two modes. Auto Speech Mode guesses which parts of the audio are voice and reduces everything else, no setup required. It works in a pinch, but it tends to shave off some of the natural texture in a speaker's voice along with the noise. Manual mode with Learn is more work and gives a cleaner result: find a stretch of your clip with only the unwanted noise, no dialogue at all, loop it, turn on Learn, and let Resolve build a noise profile from those few seconds. On my interview, an 11-second gap before the subject started talking was enough for the plugin to learn the fridge hum and knock it down without touching the voice.

Once you've learned a profile, the De-Hiss, De-Rumble, and combined presets in the dropdown give you a starting point for the next clip in the same session, and the Level knob lets you add back gain if the reduction drops your overall volume too far. Toggle the effect on and off while it plays to compare, since it's easy to over-apply this the first few times.

DaVinci Resolve Voice Isolation for Studio-Only AI Background Noise Removal

Voice Isolation uses the DaVinci Neural Engine to separate a human voice from everything else in the recording, and it's a DaVinci Resolve Studio feature. The free version doesn't include it, no matter which page or panel you go looking in. If you're on Studio and still can't find it, the usual cause is the Mixer's Track Effects setting: open the three-dot menu in the top right of the Fairlight Mixer and confirm Track Effects is checked, since the whole Track FX row disappears when it's off.

In current Studio workflows, Voice Isolation is usually easiest to manage from the Fairlight Mixer or track-level effects, especially when you want the same cleanup applied across a full dialogue track. Depending on your Resolve version and page, you may also see AI audio controls exposed elsewhere. If the control is missing, first confirm you're running Studio, then check that Track Effects are visible in the Mixer. The Amount control blends between your original audio and the fully isolated voice. Full strength removes the most noise. It also does the most damage to natural vocal texture. On a loud rooftop shoot with traffic below, I landed around 70% before the dialogue started sounding processed instead of just cleaner. Your number will depend entirely on how loud and how complex the background noise actually is.

Reach for Voice Isolation over the free Noise Reduction plugin when the background isn't a steady tone you can teach the plugin to recognize. Traffic, wind, crowd noise, and overlapping conversation are the cases where a learned noise profile struggles and an AI model trained on separating voices tends to do noticeably better.

Voice Isolation vs Dialogue Leveler

Don't confuse Voice Isolation with Dialogue Leveler. Voice Isolation tries to separate speech from background noise. Dialogue Leveler evens out loud and quiet speech levels within a clip or track. If your voice jumps in volume after you clean up the noise, that's a leveling problem, not a noise problem. Use Dialogue Leveler or a compressor after noise removal, not instead of it.

DaVinci Resolve Noise Gate Method for Removing Noise Between Words

A noise gate doesn't remove noise from your dialogue. It removes noise from the silence around your dialogue, which is a different problem and often the more noticeable one. Open Dynamics on the channel strip in the Fairlight Mixer and select Gate. Set the threshold just above your room noise floor. When the signal drops below that line between sentences, the gate closes and the background hum disappears completely during the pauses.

This is the fix for a clip where the noise itself isn't loud enough to bother anyone while someone is talking, but becomes obvious the second they stop. I use it constantly on voiceover sessions with 7 or 8 separate pickup lines. Set the threshold too aggressively, though, and you'll hear the gate snap shut mid-breath, which reads as more distracting than the noise it was supposed to hide.

DaVinci Resolve EQ and De-Hummer Fixes for Hiss and Hum

Not every noise problem needs the Noise Reduction plugin at all. Power line hum sits at a fixed, predictable frequency: 60 Hz in North America, 50 Hz across most of Europe. The De-Hummer effect in Fairlight FX targets exactly that frequency and its harmonics, and it's a faster, cleaner fix than running full noise reduction on a clip whose only problem is hum.

For general rumble and hiss, the 6-band parametric EQ built into every Fairlight channel strip works well as a first pass. A high-pass filter set around 80 Hz cuts low-frequency rumble from HVAC systems and traffic before it even reaches the Noise Reduction plugin, which means the plugin has less work to do and does less damage to the voice in the process. A gentle low-pass on the high end can take the edge off hiss from a cheap preamp or a high-gain recording.

Why DaVinci Resolve Background Noise Removal Sometimes Makes Voices Sound Robotic

The muffled, slightly artificial sound editors complain about after running noise reduction almost always traces back to one of three habits: Auto Speech Mode left at its default aggressiveness, the Amount or reduction level pushed to its maximum, or two noise-removal tools stacked on the same clip at once. Background noise and human speech share overlapping frequency ranges, so removing one always risks removing a slice of the other. The goal isn't silence. It's a background quiet enough that nobody notices it, while the voice still sounds like a person and not a synthesizer.

Some noise can't be fixed with any plugin, and that's worth knowing before you spend an hour trying. A jet flying over during a take, a door slam, a single loud interruption. Room tone and EQ can't undo a transient event layered directly on top of dialogue the way they can reduce a steady hum. In those cases, cutting the moment and bridging it with recorded room tone from elsewhere in the same clip gets a cleaner result than any amount of Noise Reduction or Voice Isolation ever will.

Frequently Asked Questions

Is DaVinci Resolve's noise reduction free?

Yes. The standard Noise Reduction plugin under Fairlight FX, along with De-Hummer, EQ, and the Gate, is available for basic cleanup work without needing Studio. Studio becomes relevant when you want DaVinci Neural Engine tools such as Voice Isolation, Music Remixer, or Dialogue Separator.

Why did Voice Isolation disappear from my Fairlight Mixer?

Check the three-dot menu at the top right of the Mixer and make sure Track Effects is enabled. If it's off, the entire Track FX section, including Voice Isolation, is hidden rather than disabled.

Why does noise reduction make my voice sound muffled or robotic?

This usually comes from Auto Speech Mode at full strength, an Amount setting pushed too high, or running two noise-removal effects on the same clip. Back the setting off until the noise is reduced rather than eliminated, and compare with the effect toggled on and off before committing.

Can I remove background noise from a whole track instead of one clip at a time?

Yes. Drag Noise Reduction, De-Hummer, or Gate onto the track's channel strip in the Fairlight Mixer instead of an individual clip, and it applies to everything on that track.

Does Noise Reduction work on music or only on dialogue?

It works on any audio, but Auto Speech Mode is tuned specifically for voice. For music beds or ambient recordings, Manual mode with a Learn pass on an isolated section of the unwanted noise gives more predictable results.

What if the background noise happens at the same time as someone talking?

That's the hardest case, and no plugin fully solves it, since the noise and the voice share the same moment in time. Voice Isolation on Studio typically handles overlapping noise better than the free Noise Reduction plugin, but a loud, sudden event like a passing truck horn usually still needs a cut and room tone rather than a processing fix.

Should I use Noise Reduction or Voice Isolation?

Use Noise Reduction for steady, sampleable sounds like hiss, fan noise, HVAC, or fridge hum. Use Voice Isolation in Studio when the background changes over time, such as traffic, wind, crowd noise, or overlapping ambience.

Is a noise gate the same as noise reduction?

No. A noise gate mutes audio below a threshold, so it only hides noise during pauses. Noise reduction tries to reduce noise under the voice itself. Use a gate for gaps between words, not for constant hiss under dialogue.

Updated July 7, 2026 Tested in DaVinci Resolve 21, Free and Studio

Jason Miller I run DaVinci Resolve Club as an independent publication: hands-on edits, color grading breakdowns, Fairlight sessions, Fusion tests, and honest notes on where Resolve gets in the way.