Klevgrand Brusfri Review: The Best Zero-Latency Noise Reducer?

For quite a while, Klevgrand Brusfri was my go-to denoiser plugin, and I still highly recommend it. It was also my introduction to Klevgrand, the Swedish music software company that has become one of my favorite sources of inspiration.

Brusfri

As I stated in my Clear review , when you’re using a decent mic for remote work, noise is your biggest foe. A good microphone will pick up air conditioners, people walking around, and the myriad other little bumps, scratches, whooshes, hums, and buzzes that surround us. Our brains filter those out really well in day-to-day life, but they become very apparent as soon as you lose the small visual and aural cues your brain uses to decide what sounds are and are not important. A denoiser plugin is a magical little thing that sets an army of fairies to work, removing all those little sounds and leaving you with a clean and professional sound. They can use a variety of different techniques to achieve this (most of which, I won’t even pretend to understand), but Brusfri’s method is simple and effective. According to Klevgrand, it uses a collection of carefully tuned expanders to filter out noise without sounding unnatural or introducing weird audible artifacts.

Klevgrand, a company named after the alley in Stockholm in which they began, has created a wide range of interesting and quirky plugins. Their products range from relatively simple and straightforward EQs like GotoEQ to the innovative and unusual Tomofon synthesizer. Their products nearly always sound fantastic and have a simple, clean interface that is easy to use. Brusfri is no exception.

The UI

The Brusfri UI

The UI is broken up into three simple sections.

On the left, you have the basic noise reduction controls, including the attack, threshold, and release settings. You also get a simple lookahead toggle, which lets it look 20ms into the future to handle things like drum sounds. You can use the controls here to adjust how hard it’s working, and how quickly it starts and stops doing its thing. Somewhat unintuitively, the threshold control feels a little backwards to me, but the UI explains it nicely: you lower the threshold to reduce the noise more. I find that the default threshold of 0% works well, but I prefer to raise it to 10-15% to sound a bit more natural. I also turn off lookahead, since the 20ms of latency that it introduces isn’t worth it to me. I usually don’t bother with any other controls.

In the middle, you have the all-important giant learn button. All you do is stay quiet and hold the button down for a second or two. If the noise around you changes (for me, it’s usually an air conditioner turning on or off), repeat the process to learn the new noise profile.

To the right of that, you have the “tonality” section, which allows you to make minor adjustments as needed. The smooth control adjusts the expander ratios to precisely determine how much noise is removed when the signal drops below the noise threshold. SC-HPF adjusts the side-chain high-pass filter, altering how it handles lower frequencies. Treble does precisely what it says on the label: it boosts the higher frequency content after removing noise. Gain adjusts the output volume after the noise has been reduced. Finally, the mix is controlled by the usual mix knob, which adjusts unbalanced and processed signals.

Along the top of the UI is a handy box that indicates the function of each element when you hover the mouse over it. That little box is the only reason I don’t immediately start adjusting the threshold control backwards every time. There are also controls for saving and loading presets, but honestly, I wouldn’t bother. Finding and loading a preset file would take about as long as setting up the whole thing from scratch.

Brusfri in action

Let’s run some particularly noisy sound through it, to see how it does.

For this demo, I disabled lookahead and left all of the other settings alone (besides lowering the threshold to 20% for the 2nd demo). The plugin was trained on the second or so of noise at the beginning.

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Why it’s great for remote work

Three reasons: with lookahead turned off, it’s zero-latency; it does a fantastic job; and it’s straightforward to set up quickly.

For me, it’s especially well-suited for working at home (as opposed to travel) because I can simply map a button on a MIDI controller to the “learn” button to quickly relearn my environment’s noise. Fair warning, though: when it’s learning noise, it doesn’t do any noise reduction at all. If you are unmuted in a meeting, you might accidentally blast everyone with noise. For that reason, I tend to set up a macro in my DAW to mute myself while Brusfri is learning.

When traveling (so most of the time), I don’t have a MIDI controller handy, so I have to actually go click a button, which isn’t ideal.

One trick I found to make this less of an issue is to use multiple denoiser plugins. I use one that doesn’t require learning a noise profile (I use iZotope’s RX Voice De-noise set to Adaptive mode).On its own, it doesn’t sound great when it’s set up to remove all noise, but it works decently when you need a lighter touch, with its noise reduction settings dialed down enough to sound okay, followed by Brusfri. The first one takes care of most of the heavy lifting and evens out the pronounced noise, providing Brusfri with a more stable noise profile to deal with. If you’re not constantly dealing with changing noise, though, I would go with Brusfri on its own.

Another great thing about Brusfri, which I’ve never taken advantage of, but really want to, is Tula Mics . Klevgrand teamed up with Tula on their travel mic, and the thing as Brusfri built into the mic itself! It’s specifically targeted at musicians and digital nomads, making it a nearly perfect fit for me. I’m already sold on Brusfri, and building the learn button into the mic itself would really boost its usability. If I had a spare $280 lying around (for the mic + dead cat bundle), I’d buy one in an instant (hey Klevgrand and/or Tula, I’m open to bribes here!).

You already said Supertone Clear is the best for remote work, so why bother with Brusfri?

Unlike Clear, Brusfri can operate with zero latency, which is a significant advantage. Clear does a better job and doesn’t require learning the noise profile, but it also introduces 24.5ms of latency; it’s the single most significant contributor of latency in my entire processing chain.

The other primary consideration is that Clear is basically useless for anything besides the human voice. If you’re like me and enjoy dabbling in music production, Clear just won’t cut it. If you want to clean up a noisy guitar or synth recording, you’re out of luck. Brusfri can handle those situations better than anything else I’ve ever tried.

One other thing to bear in mind is that Brusfri is cheaper. Its regular price is $60 (as of December 2025), occasionally dropping to as low as $24 on sales. Klevgrand also tends to partner with other companies and offer their stuff for free; there’s actually a pretty good chance I got it for free. Something like Clear, on the other hand, starts at $100 and drops to the $50-60 range during sales.

Additionally, in some cases, a single plugin can still struggle. In my audio demo above, I found that neither Brusfri nor Clear could quite cope with the noise, but the combination of the two worked pretty well.

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Overall impressions

If you don’t feel like paying the premium price for Clear, want to remove noise from more than just vocals, or want to support an excellent company, the Brusfri is absolutely worth considering. Grab a copy here . It’s a bit of a no-brainer.