Klevgrand Brusfri Review (Noise Reduction Plugin)

Klevgrand Brusfri Review
Klevgrand Brusfri Review (Noise Reduction Plugin)
Klevgrand Brusfri Review (Noise Reduction Plugin) - 2024 Update

Klevgrand Brusfri is a life-saver for bedroom producers, home recordings, and other noisy recordings and audio.

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Klevgrand Brusfri is a life-saver for bedroom producers, home recordings, and other noisy recordings and audio.

If you’re like me, living in a bustling and busy city, producing music from your laptop in your bedroom, noisy recordings are one problem that’s recurring. Even in studio recordings under a controlled environment and in acoustically treated rooms, there are issues with headphone bleed, especially with bright and bleedy headphones like the Audio Technica AT-series.

Then there are live drum recordings that just cannot escape from noise and bleed. For situations like these, you need a reliable noise reduction solution. The Klevgrand Brusfri is a simple, clean, and artifact-free plugin that has the ability to maintain audio fidelity while significantly reducing noise.  

It successfully reduces the laptop fan noise, headphones bleed in the form of metronome/click, and other background noise in a few steps. So, let’s discuss the plugin in more detail. 

Also, Brusfri is also part of our “top 6” noise reduction roundup, check that out to choose plugin that works best for you.

Installation & Compatibility

The plugin comes packaged in a zipped file, which consists of an installer that automatically installs the plugin for you. If you’re a Windows user, the installer will ask you where you want to install the plugin and then give you the options to install the VST3, VST2, and AAX versions of the plugin. It is compatible with Windows 7 and later versions. 

For Mac, you get the AU version of the plugin as well, and it is available in macOS 10.10 or later (optimized for the M1-processor) operating systems.

User Interface

Brusfri has a pretty straightforward interface with a single-window consisting of three main sections. In the first section, you can set the threshold for the noise reduction, set its envelope, engage the lookahead function, and change the attack and release of the plugin. 

Klevgrand Brusfri Review (Noise Reduction Plugin)

The ‘Attack’ parameter governs the initiation time of the noise reducer, determining how quickly it begins its noise reduction process. The ‘Threshold’ control is instrumental in setting the offset for the threshold curve. A lower value corresponds to a more aggressive reduction of noise. The ‘Release’ parameter dictates how long it takes for the noise reducer to conclude its operation, influencing the duration of its effect.

Finally, the ‘Lookahead’ toggle controls the Lookahead feature. When turned off, the internal gates operate without anticipating noise levels in advance, providing a real-time response to the audio input.

The next section is where the plugin can learn the noise profile. Here, you just need to click the “LEARN” button and make the plugin listen to the noise. Merely a brief recording of one or two seconds containing only the noise is sufficient for the process to function effectively.

Klevgrand Brusfri Review (Noise Reduction Plugin)

Ensuring that the audio content exclusively consists of noise is crucial. If there are elements other than noise in the recording, the analyzer might mistakenly identify them as noise and attempt to diminish their presence.  

The last section lets you tweak the overall tonality of your noise reduction. While Brusfri generally excels in generating effective noise profiles, situations with heavy noise may necessitate adjustments. The ‘Smooth’ control takes center stage in this section, allowing you to slide it up or down to influence the degree of noise reduction, essentially altering expander ratios. A lower value on the ‘Smooth’ control results in a smoother reduction of noise.

Klevgrand Brusfri Review (Noise Reduction Plugin)

Additionally, the Tonality section offers further refinement with the following controls:

  • HPF (High-Pass Filter)

This control determines the low-cut frequency in the internal side chain, shaping the plugin’s responsiveness to specific frequency ranges.

  • HIGH (High-Frequency Boost)

This parameter enables users to boost high frequencies during the post-processing stage, providing flexibility in tonal shaping.

  • MIX (Signal Balance)

The Mix control becomes a pivotal factor in determining the balance between the processed and unprocessed signals. Users can adjust this parameter to achieve the desired blend, tailoring the output to their preferences.

Algorithm Explained

Brusfri, Swedish for ‘Noise Free,’ is more than just a catchy name and serves as a highly effective tool for audio engineers seeking to minimize noise interference in their recordings. Unlike traditional expanders that may yield inconsistent results, Brusfri employs a series of targeted expanders operating at different frequencies.

Through an automated adjustment of each expander’s settings based on a provided sample of isolated noise, Brusfri achieves satisfactory noise reduction outcomes. Its advanced analyzer enables it to tackle diverse forms of noise, exhibiting the ability to diminish specific frequencies selectively.

Whether dealing with a 50Hz hum, microphone hiss, room tones such as reflections or fan noise, or even electronic static noise from cables or vintage audio equipment, Brusfri adeptly isolates and reduces the identified noise while preserving the integrity of the remaining audio content during processing.

Brusfri refrains from employing phase cancellation techniques to preserve the natural sound of the processed audio without introducing artifacts. However, this choice also means that Brusfri is not suitable for addressing transient forms of noise, such as clicks and pops.


Brusfri is quite effective at its job. From poorly recorded vocals plagued by room reflections to buzzing clavinet or electric guitar tracks, it consistently delivers impressive results. The plugin is also effective in eliminating sibilant frequencies and reshaping compressed acoustic guitar tracks.

Overall, Brusfri strikes a good balance between effectiveness and ease of use and is great for cleaning noisy vocal recordings, location sound, boom mic recordings, instruments, guitars with noisy cables, etc., but may not be ideal for recordings with transient-heavy information like drum recordings.

Its user-friendly interface also facilitates a hassle-free experience and is simple enough for the plugin to be applied in, at most, a couple of minutes. 

Klevgrand Brusfri Official Website

Buy/try Klevgrand Brusfri here

Check out Klevgrand Brusfri’s manual here

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