(Quickly) Remove Background Audio Noise in DaVinci Resolve

remove audio noise

Your recorded audio could have a lot of background noise coming from air-condition, fans, wind noise, power line hums and hisses, etc, to name a few.

Today, we’ll see how to remove all these unwanted background noises from your audio clips in DaVinci Resolve.

We’ll also see how to reduce noise from individual clips and track as a whole (which contains all the clips).

Without wasting time, let’s get started!

Does DaVinci Resolve have Noise Reduction for Audio?

DaVinci Resolve has noise reduction features which can be found in “Effects Library” under “Edit“, “Fairlight” and “Cut” page.

The “Effects Library” also contains other important plugins like De-Hummer, Dialogue Processor, De-Esser plugins, etc,.

On top of that, we can also use third party VST plugins like iZotope inside Resolve.

How to Remove Background Audio Noise in DaVinci Resolve 17

You can remove unwanted noise like air-condition, fans and wind noise using “Noise Reduction” plugin.

  • Under “Edit” page, click on “Effects Library“.
  • Click on “Audio FX“.
  • Locate “Noise Reduction” plugin.
  • Drag and drop the plugin on your desired audio clip.
  • Select “Manual” and click on “Learn“. The button should be highlighted.
  • Move your playhead to where you have the unwanted noise, like wind or rumble.
  • Play the audio clip, which has the noise only part, and stop.
  • Now Resolve has learnt the noise print.
  • Click on “Learn” so that it’s not highlighted any more.
  • Now play the audio clip. There should be no noise.

For an effective noise removal, the “Learn” part is very important for Resolve. If the noise is accurately learnt, then that can be removed easily.

(Auto Speech Mode – Try this option when you have a dialogue. Resolve will automatically “learn” the noise and remove it.)

But if you’re not satisfied with the noise removal, then play with different settings like “Threshold“, “Attack“, “Sensitivity“, etc,.

In the “Output” section, there are two knobs – “Dry/Wet” and “Level”.

Using the “Dry/Wet” knob, you can actually lessen or maximize the output of noise removal done through the above methods.

Level” – If your audio db level is reduced because of the noise reduction, you can use “Level” knob to increase the db level (output gain).

Toggle the “Noise Reduction” button on and off to see the – before and after – difference. The button can be found in the top left corner.

(You might have to play the audio in a loop when you’re working with plugins so that you can correctly identify the noise and remove it.)

The above is done for a single audio clip.

If you want to apply the same noise reduction settings to multiple clips, then you’ll have to create a preset.

How to Create a Preset for Audio Noise Reduction in Resolve

After dragging and dropping “Noise Reduction” plugin on one of the clips and changing the settings to your taste, you can save the settings into a preset.

  • Inside the “Noise Reduction” plugin, click on “+” icon, which is called as “Add Preset” – found on the top left corner.
  • Enter a name.
  • Click on “Ok” to save the preset.
  • Clicking on the preset drop-down will display your created preset.
  • Next time, when you drag and drop “Noise Reduction” plugin on other clips, you can choose this preset from the drop-down.
  • This will save you a lot of time!

If you have a lot of clips with the same background noise in the same track (inside your timeline), then instead of dragging and dropping “Noise Reduction” plugin on a clip, you can drag and drop it onto a track header.

Now the changes that you do in noise reduction plugin will affect the whole track with all the clips in it.

(Please keep in mind that after dragging and dropping, you can also access noise reduction plugin from the “Inspector” tab.)

You can do the same on “Fairlight” page as well.

How to Add Noise Reduction Plugin to a Track in Fairlight Resolve?

  • Go to “Fairlight” page.
  • Click on “Mixer” – it should display your audio track.
  • Under your track, against “Effect“, click on “+” sign.
  • Select “Noise Reduction” -> “Noise Reduction“.
  • This noise reduction plugin will be added to the whole track.

And inside Fairlight, you can also add noise reduction plugin to individual clips and save as presets, as you did in “Edit” page.

There are also other plugins which can remove noise like a power line hum and low rumbles inside a room.

How to Remove Hum Noise in DaVinci Resolve

You can remove hum noise by using “De-Hummer” plugin found under “Effects Library”.

  • Under “Edit” page, click on “Effects Library“.
  • Click on “Audio FX“.
  • Locate “De-Hummer” plugin.
  • Drag and drop the plugin on your desired audio clip.

You can play with the “Frequency” and “Amount” knobs till the hum is removed.

Powel line hum frequency in US is 60 Hz and in Europe it is 50 Hz. So you can select the appropriate radio button under “Frequency” for a much better result. If not, you can always adjust the knob according to your requirements.

How to Remove Low Rumble Noise in DaVinci Resolve

Equalizer plugin can easily remove low rumble noise, which is generally of low frequencies.

A high-pass filter (band 1) should do the job of ignoring low end frequencies without affecting other frequencies.

  • Go to “Fairlight” page.
  • Click on “Mixer” – it should display your audio track.
  • Under your track, against “EQ“, double click on the graph.
  • The “Equalizer” plugin will be displayed.
  • Click on “Band 1“.
  • Play the clip. If the noise is removed, then you are good.
  • If not, then adjust the frequency knob such that EQ catches hold of the low frequency noise and removes it.
  • If needed, increase the gain (on the right-hand side of the plugin) to make up for any reduction in sound because of EQ processing.

Using Equalizer, you can also remove high frequency hiss sounds. All you have to do is apply a low-pass filter (Band 6). This low-pass filter will remove the higher frequencies (hiss sound).

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