Downloading bxsubfilter 1.1 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. This free program is a product of Plugin Alliance. The most popular version among bxsubfilter users is 1.1.
The software is categorized as Multimedia Tools. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. The latest version of bxsubfilter is supported on PCs running Windows 10/7/8/11, 64-bit.
From the developer:
The bx_subfilter is a free plugin for adding clarity and definition to tracks that have troublesome low frequencies. It implements the same great analog-style filtering present in its bigger brother, bx_subsynth, but with the added bonus of a three-step “Resonance” switch, so users can select resonant peaks for additional flexibility.
You may want to check out more software, such as Jupiter-8V, Guitar-Online Tools - Tuner or Psycle, which might be similar to bxsubfilter.