Klevgrand Brusfri - Detailed Review

Klevgrand Brusfri Overview

Klevgrand Brusfri is a sophisticated audio noise reducer that stands out for its simplicity and effectiveness. Here are the key features and how they work:

Noise Reduction Algorithm

Brusfri uses a unique approach to noise reduction, avoiding the common method of audio phasing that can introduce unwanted artifacts like squishy or robotic sounds. Instead, it employs multiple fine-tuned gates and frequency-trimmed expanders to intelligently identify and reduce unwanted noise. This method ensures that the desired sound remains untouched and natural.

Learn Button

The “Learn” button is a crucial feature that allows Brusfri to analyze and create a noise profile. By holding the Learn button during a few seconds of isolated noise, the plugin can recognize the background noise and set up the necessary thresholds for the expanders. This process is essential for effective noise reduction.

Attack, Threshold, and Release

These parameters control the internal expanders of Brusfri. The Attack Time sets how quickly the noise reduction starts, the Threshold determines the level of noise to be removed (a lower value means more reduction), and the Release Time sets how long it takes for the reduction to fade out. These controls allow for fine-tuning the noise reduction process to suit different audio materials.

Tonality and Additional Controls

• Tonality: This feature helps in tweaking the noise profile, especially in cases with heavy noise. It ensures that the noise reduction works as expected without affecting the sound quality.
• EDGE: This control adjusts the aggressivity of the noise reduction. A lower value gives a smoother reduction.
• HPF (High Pass Filter): This reduces low frequencies, helping to eliminate noises like microphone wind noise or stand vibration.
• HIGH: This compensates for high frequencies by boosting them, which can be lost during heavy denoising.

Lookahead and Mix Controls

• Lookahead: This feature adds a few milliseconds of latency but gives the processor advanced warning of transients, helping in more accurate noise reduction.
• Mix: This control adjusts the balance between the processed and unprocessed signal, allowing for more transparent results by blending the two signals to an acceptable noise level.

Compatibility and System Requirements

Brusfri is compatible with macOS 10.10 or later (optimized for M1 processors) and Windows 7 SP1 or later. It supports AU, VST-2, VST-3, and AAX plugin formats at 64-bit depth. For iOS, it works as an AUv3 plugin and requires an iPhone 6S or iPad Air 2 or better due to its CPU-intensive nature.

AI Integration

While Brusfri does not explicitly use AI in the form of machine learning algorithms beyond the initial noise profiling, it does utilize a sophisticated algorithm to analyze and adapt to the noise profile created through the “Learn” function. This approach ensures effective noise reduction without the need for complex AI-driven processes.

Conclusion

In summary, Brusfri offers a straightforward yet powerful solution for cleaning up noisy audio recordings, retaining sound quality, and avoiding common artifacts associated with other noise reduction methods. Its intuitive interface and adjustable parameters make it a valuable tool for various audio projects, from podcasts and voiceovers to music and film recordings.