Bertom Audio Denoiser Classic noise reduction plug-in: features and spec-based rating

Bertom Audio’s noise reduction and audio repair plug-in Denoiser Classic reduces noise with no latency. It uses conventional controls that do not use FFT (a method that processes sound split into frequencies), and the manufacturer explains that the CPU load is low and that it can be used on music as well as voices. You choose how much to pay, so you can get it for nothing.

Noise reduction and audio repair software is a tool for reducing, after the fact, noise that got into a recording, such as air conditioner noise, room ring and hum.

In this article we compare Denoiser Classic with 13 noise reduction and audio repair programs and rate how well it serves its purpose on three criteria. The basis is official manufacturer information.

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Summary

Among the 13 noise reduction and audio repair programs, Denoiser Classic is rank C. The ranks run S, A, B and C, and C is the lowest. Averaging the scores for each criterion (out of 5, with the one criterion that matters most for the purpose counted double) gives 2.2.

Strengths

• Streaming and real time (4 points): you can reduce noise on the spot while streaming or recording.

Things to keep in mind

• Noise control for vocal recordings (2 points): the kinds of noise it deals with are limited.
• Sound separation (1 points): it has no feature for separating mixed sound.
• Speed (2 points): repair work takes time.

Who it suits: people who want to try noise reduction for free first, and people who want low-latency noise reduction for live use and streaming.

Main features of Denoiser Classic

Noise reduction with no delay and a low CPU load

Denoiser Classic is described as a zero-latency noise reduction plug-in that can be used for music, finishing video and live use. The manufacturer explains that it uses conventional processing that does not use FFT, so the unnatural sounds (artifacts) that come with FFT are less likely to appear and the CPU load is low. It is not limited to voices, and all the parameters can be automated.

Pay what you want

It is sold on a “Pay What You Want” basis, so you can get it for nothing. Denoiser Pro is also offered as a paid higher product.

Video: “Bertom Denoiser Classic v3 – Free noise reduction plug-in” (official Bertom Audio YouTube channel; narration in English) Watch on YouTube

Where it is useful

• Trying noise reduction for free
• Applying noise reduction to a voice or guitar while recording, with no delay

Rating by criterion

Noise control for vocal recordings: 2 / 5

We look at how it deals with noise that often gets into home recordings.

It is a process that reduces noise. We could not confirm dedicated processing for hum, clicks, room ring or lip noise.

If “noise control for vocal recordings” matters most to you, RX 12 Advanced and RX 12 Standard (5 points) are a better fit.

Sound separation: 1 / 5

We look at features that separate the voice from the backing, or separate by part.

It has no feature such as part separation.

If “sound separation” matters most to you, RX 12 Advanced and SpectraLayers Pro 13 (5 points) are a better fit.

Speed: 2 / 5

We look at features that make repair work faster.

You adjust the amount of noise reduction and similar settings yourself with conventional controls.

If “speed” matters most to you, RX 12 Advanced and SpectraLayers Pro 13 (5 points) are a better fit.

Streaming and real time: 4 / 5

We look at whether it can reduce the noise in a voice in real time while streaming or recording.

The manufacturer explains that it is a zero-latency plug-in that can be used live. It is not explicitly stated to be for streaming.

How we score (Noise reduction and audio repair software)

Criterion	Basis	5 pt	4 pt	3 pt	2 pt	1 pt
Noise control for vocal recordings	How it deals with noise that often gets into home recordings	Deals with background noise, hum, clicks and room ring, and even lip noise, breaths, sibilance and plosives	Deals with most of those	Deals with the basics: background noise, hum, clicks and room ring	Only some	—
Sound separation	Features that separate voice from backing, or by part	Voice extraction, part separation, removal of bleed and separation of scenes are all included	Three of those	One or two of those	—	No separation features
Speed	Features that make repair work faster	Automatic suggestions, spectral editing and batch processing, plus features that match ambience and EQ	Automatic suggestions, spectral editing and batch processing	A feature that automatically suggests repair settings	—	—
Streaming and real time	Whether it reduces noise in a voice in real time while streaming or recording	Works in real time, and use for streaming is stated officially	Voice noise reduction is available as a real-time plug-in with no delay (zero latency)	Can be used as a plug-in (amount of delay not stated)	Mainly editing after recording (only the preview of processing is real time)	Cannot be used in real time

Each criterion is scored from 1 to 5 on how well the product serves one goal: reducing the noise in a vocal you recorded at home. Scores follow the conditions in the table above, and the rank is based on an average in which "Noise control for vocal recordings" counts double. The basis is official manufacturer information. Sound quality and CPU load are not measured, so they are not scored; reviews from trade magazines are introduced in the articles for reference. Price is not part of the score. Features that cannot be confirmed from the manufacturer's or a retailer's description are scored as if absent. "Streaming and real time" is a criterion that answers the common search for "noise reduction that works for streaming". The "OBS (streaming)" column in the table shows whether the official page lists the VST2 format that the streaming software OBS Studio can use (○). OBS does not support the VST3 format. It is not part of the score.

Denoiser Classic system requirements and getting started

Operating system	Windows 7 or later / macOS 10.13 or later (Apple silicon supported) / Linux
Plug-in formats	Windows: VST3, AAX / Mac: VST3, AU, AAX / Linux: VST3
Other	Not a standalone app. It can be obtained for free
Price	Free
OBS (streaming)	Does not work as it is (VST3 only). It can be loaded through a bridge plug-in

Checked on the manufacturer’s official pages on October 17, 2026.

Compared with other noise reduction and audio repair programs

Click a heading to sort. On a phone, the table scrolls sideways.

Read next

• Restoration Suite 2: features and rating (rank C)
• WNS: features and rating (rank C)
• Clear: features and rating (rank B)
• Clarity Vx: features and rating (rank B)