Bertom Audio Denoiser 2 Review (FREE Noise Reduction Tool)

Bertom Audio Denoiser 2 Review

Bertom Audio’s Denoiser 2 is a noise reduction plugin with a unique workflow that offers multi-band capabilities for setting bias and range parameter controls. We will go deeper into what these parameters do in the next section. For now, just know that it’s available in many versions. The Classic 2.1.5 version is free, while the Classic 3.0.5 and Pro versions are the paid alternatives.

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Bertom Audio Denoiser 2 Classic v/s Pro

Denoiser Classic has zero-latency performance, ensuring minimal delay during real-time audio processing. Its efficient utilization of CPU resources makes it an ideal choice for those seeking optimal performance without taxing their system resources. The plugin’s interface is designed for intuitive operation, featuring a user-friendly layout that streamlines workflow.

At the heart of Denoiser Classic lies a comprehensive set of controls, including a Threshold slider and six individual frequency band sliders. These sliders let you fine-tune the degree of noise reduction across different frequency ranges. 

Additionally, you can further refine their adjustments by applying high-pass and low-pass filters to isolate specific frequency components. The inclusion of HF Bias functionality enhances the plugin’s versatility by enabling you to target problematic areas with enhanced precision, ensuring optimal noise reduction results.

Workflow Overview

When I opened the plugin, I wasn’t sure about what the parameters do exactly. No manual was available to guide me, so I had to explore and find out myself. The plugin has access to two essential controls, Bias and Range, which play pivotal roles in refining the noise reduction process to match specific audio environments and user preferences.

  • Bias Button

The Bias control, also known as High-Frequency Bias or HF Bias, serves to adjust the sensitivity of the noise reduction algorithm to high-frequency content, typically above 2.5kHz. When activated, Bias enables the Denoiser to focus more acutely on high-frequency components within the audio signal, thereby preserving transient details and sibilant sounds more effectively.

I would use this functionality when I want to maintain clarity in high-frequency elements, such as vocal consonants or sharp transient sounds. 

  • Ratio Mode

The Ratio Mode governs the behavior of the internal expanders within the Denoiser plugin. Through adjustments to the Range setting, you can alter the expansion ratio applied to different frequency bands, thereby influencing the overall characteristics of noise reduction.

Higher Range settings correspond to lower expansion ratios, resulting in a more gradual attenuation of noise, akin to a “gentle” mode. Conversely, lower Range settings yield higher expansion ratios, facilitating more aggressive noise reduction, particularly in frequency bands where noise is prominent.

  • Threshold

The Threshold slider serves as the gateway to noise reduction, offering more elaborate control over the attenuation level. Accompanying this are six frequency band sliders, facilitating targeted noise reduction across various sonic spectra. Additionally, you can fine-tune their adjustments with high/low-pass filters and engage the HF Bias feature for enhanced precision.

I like how strategically the Threshold and frequency band sliders are placed so you can achieve optimal noise reduction while preserving the integrity of their audio signals.

I also found the plugin’s zero-latency performance to seamlessly integrate into any production environment, whether live sessions or post-production endeavors. Moreover, the inclusion of Denoiser Pro extends the plugin’s functionality, offering advanced features such as Adaptive Mode and per-band thresholds for heightened control.

Lastly, the interface is a single-window interface and is quite easy and simple to use. You can also scale Denoiser 2 to resize its window.

Bertom Audio Denoiser 2 Review  

How does Denoiser sound?

I like the plugin’s ability to preserve the source material’s natural dynamics and tonal characteristics. From subtle noise reduction to drastic cleanup, Denoiser proves to be versatile. The absence of FFT (Fast Fourier Transform) and associated artifacts ensures a clean, artifact-free noise reduction process.

I tested it on vocals and found that it effectively removes background noise from recordings, offering easy-to-use controls and dynamic treatment with its 5-band EQ. By identifying and addressing specific frequencies contributing to the noise, you can achieve a balanced result without compromising the clarity of the audio content.

Moreover, the plugin’s high-pass and low-pass filters enable further refinement, while the high-frequency bias option is beneficial for enhancing noise sensitivity in higher frequency ranges. 

Denoiser is also decent with cleaning instrument recordings and loops. By carefully adjusting the processing parameters, you can achieve a desirable balance between noise reduction and preservation of the original audio characteristics. 

Bertom Audio - Denoiser v2 - Review (Best free denoiser?)

Pros & Cons

The plugin boasts an impressive array of advantages. Firstly, it does a satisfying job in noise reduction, effectively diminishing background noise and enhancing the clarity of audio recordings. Its versatility makes it suitable for various applications, catering to podcasters, bedroom producers, audio engineers, and content creators alike.

Moreover, its user-friendly interface ensures ease of use, appealing to both beginners and seasoned professionals. Another notable advantage is its low CPU usage, ensuring smooth performance even in demanding projects. The plugin’s zero-latency processing enables real-time monitoring without any delay. Also, it’s not limited to vocal cleaning, and its application extends to instruments, location sounds, and other forms of audio and recordings. 

Despite its many strengths, the plugin does have some limitations. I noticed that aggressive noise reduction settings sometimes introduce artifacts or affect the natural sound quality of the audio. While effective in many cases, it may not completely eliminate noise in extremely challenging audio environments. Next, I wasn’t able to find its manual, which I consider a huge con, as the Bias and Range parameters weren’t very clear to me initially.

Finally, the frequency bands are controlled simultaneously, and you cannot tweak them individually. 


Denoiser Classic and Denoiser Pro are available in AU, VST3, and AAX formats, ensuring compatibility with most digital audio workstations (DAWs) across macOS (10.13 upwards), Windows (7 upwards), and Linux platforms.


To conclude, Denoiser 2’s intuitive interface and advanced non-FFT-based noise reduction algorithms make it a solid tool for removing background noise. While the free version, Denoiser Classic, offers a satisfactory array of features, the enhanced capabilities of Denoiser Pro make it a worthwhile investment. I hope this article was of help. Thank you for reading. 

Download Bertom Audio Denoiser 2 here

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