Klevgrand's Brusfri targets noise, not full mastering

The audio task

An engineer has a field recording or an otherwise usable take carrying steady background noise, hiss, hum, room tone, air conditioning, and wants a fast, narrow fix rather than opening a full restoration suite or running the whole mix through a mastering chain. The job is subtraction of one specific problem, not general enhancement.

What the documents show

Klevgrand's own Brusfri product page describes it as 'a highly advanced audio noise reducer' built on 'multiple fine-tuned gates' rather than phase-altering techniques, priced at $59.99 for the desktop version in AU, VST, and AAX formats, with a separate iOS release available as a standalone app or AUv3 plugin. The page states Klevgrand's demo model plainly: 'All our plugins can be downloaded and tested for free. The demo is the full version, but with occasional audio dropouts.' The page frames Brusfri as a single-purpose restoration tool, not a mixing or mastering assistant, and it does not detail the machine-learning method beyond naming the gating approach. Klevgrand's Terms of Service & EULA set a single-user, single-session software licence, and state that this licence does not cover using any bundled 'musical example connected to the Software' in a commercial production, while adding explicitly that 'the limitation set out herein shall not be understood as limiting you from making public or otherwise releasing your own projects created with the use of Software.'

Rights status

Brusfri's licence governs the plugin itself and any Klevgrand-supplied demo content bundled with it; it does not restrict a recording a user already owns and simply processes through the plugin. Klevgrand's own terms confirm a user may commercially release a project built with the software, while any factory demo audio shipped alongside it stays under the separate, more restrictive Catalog content terms. Neither document offers an independent measurement of noise-reduction quality; 'highly advanced' is the vendor's own description. This reflects both pages as retrieved on 16 September 2026.

What to check before you use it

This is an editorial checklist. Confirm whether the desktop or iOS version is being licensed, since delivery and update terms differ and the iOS build runs through Apple's own store terms as well. Use Klevgrand's full-featured demo, with its stated dropouts, to judge the plugin's fit for a specific noisy recording before buying. Do not repurpose any bundled demo or example audio commercially, since that use is excluded even though a user's own processed recordings are not. Treat quality claims in the product copy as the vendor's own characterization rather than a verified benchmark.

• Which platform version, desktop or iOS, is actually being licensed for this session?
• Has the free, full-featured demo been used to judge fit on this specific noisy recording?
• Is any bundled demo or example content being kept separate from material intended for commercial release?

Brusfri answers a narrow restoration problem, reducing steady noise in an existing recording, and Klevgrand's own terms are explicit that a user's finished project stays theirs to release, while the plugin's own demo content and its noise-reduction claims remain the vendor's, not an independently verified result.