Brainworx founder and CEO, Dirk Ulrich, has always emphasized the importance of accurate filtering when treating frequencies in a mix. During his long-lived days as a producer and engineer, working with the likes of Dream Theater, Toto and Michael Jackson, he found that some of the most critical parts of a mix lay within the sub-sonics and super-sonics of a sound. That is, by simply filtering out the imperceptible spectra above and below the desired core character of a sound, one could be well on their way to an immaculate sounding mix—even before the addition of any further dynamics or frequency treatment.

It was on this principle that Dirk designed the bx_cleansweep V2, a deceptively simple and yet powerful hybrid High-Pass and Low-Pass Butterworth filter that implements gently sloped curves (6 dB/octave) in order to achieve a musical and nonintrusive effect when zeroing-in on a sound’s intended character. A joystick control, much like an X/Y pad, helped facilitate intuitive and direct movements towards a cleaner sound stage. The bx_cleansweep design, like it’s bigger siblings – bx_digital V3 and bx_hybrid V2, features Anti-Crush technology. This analog model for filter curves prevents the harshness and aliasing found in certain other EQs.

Now, Brainworx has introduced a third reincarnation of the beloved filter plugin: the bx_cleansweep Pro. Sporting the addition of five filters with adjustable slopes and characters for each, and spectrum analysis with an advanced frequency/phase plot, this next generation in the bx_cleansweep legacy provides an accurate and intuitive tool for your mixing needs. Use it to tweak and tune the deeper regions of your mix, or create interesting spectral sweeps and effects when designing sounds. Make it the first piece in your chain on every single track, and you’ll be amazed at how just a little filtering can go such a long way.

Download the full function 14-day demo (no dongle required!) to explore all the amazing possibilities of bx_cleansweep Pro yourself.


  • Joint HP/LP filter with in-depth frequency response control
  • In addition to Butterworth, five new filter types with additional control options
  • o Bessel, Chebyshev (Type I & II), Elliptical, and Resonant Butterworth
  • Each filter adjustable up to the 6th order
  • New View Modes in graph panel with value callouts at each coordinate: Spectrum analyzer, Magnitude, Phase, Group Delay 
  • Input Gain allows compensation for post-filter volume reduction
  • Joystick/matrix controller manipulates both HP and LP filters on an X/Y plane, creating an intuitive interface for honing-in on character
  • Phase reverse tool button

Audio Examples

Industry Reviews

  • Jody Wisternoff
    Jody Wisternoff

    Brainworx bx_cleansweep Pro might have just become my go-to hi/lo pass filter ! Sounds lovely , and the joystick interface is a top notch idea :)  I can see this plugin becoming a… Read More

  • Stonebridge

    I haven’t seen a fun plugin like this since the early GRM Tools days. It’s perfect using the joystick to sweep out the most funky or twisted sounds in a way you just can’t do with a… Read More

  • Toby Pitman
    Toby Pitman

    A real Jekyll and Hyde of a filter. From subtle shelving effects to face melting resonance. Packed with creative possibilities.

  • Thomas Gold
    Thomas Gold

    Great tool to shape sounds! It’s easy to use and gives you a lot of options. I like the variety of filter types and that you can adjust the order and resonance. I use this plug a lot for… Read More

  • James Wiltshire
    James Wiltshire

    I challenge you -- put this on every channel of your mix and see how far you can get with just this and balance.

Customer Reviews

  • ★★★★★
    The one you didn't know you needed
    by Donald Trump
    Brilliant plug-in. The kind of thing you'd think you wouldn't need until you use it on ... everything.
    Plugin Alliance response
    You´re not "really" Donald Trump, hm? ;-)Thanks for the positive review though.
  • ★★★★★
    Low Cut
    by Keith Moore
    My favorite EQ for cutting that unessesary low end.
  • ★★★★★
    bx_cleansweep Pro
    by Ebro
    It's been one of the first plugins in my toolbox since I got it, and it's worth of every cent. Thanks.
  • ★★★★☆
    I overlooked this one, That was a mistake
    by Mixedby6
    Super simple but amazingly effective, no need to wonder how to get the sound you want from your recordings, this little tool takes out everything that will muddy and mess up your track with ease.
  • ★★★★★
    bx_cleansweep Pro
    by Alex Hepting
    For all kind of progressive sound effects this thing is a must have.
    A filter setup combination of LP and HP can be used to push the sound forward and back. This ability gives more depth to… Read More


  • Gearslutz 5 Star Review Award
    Gearslutz 5 Star Review Award

    "bx_cleansweep Pro is a powerful filtering plugin that is down-right addictive! All in all, it has accurately been coined a “nonintrusive effect,” and after some demoing I get it. It’s all about focusing on the primary sonic character of the sound and then filtering around and within it — zeroing-in on a sound’s intended character." - Tommy Zai


Supported Plugin Formats

Supported Operating Systems
Mac OS X 10.8 through 10.13
Windows 7 through 10
Pro Tools 10.3.10 or higher or any VST/VST3/AU-compatible host running on a supported operating system

Intel CPU only (minimum 2 GHz recommended)

Intel-compatible CPU with SSE2 instruction set (Pentium 4 compatible or higher; minimum 2 GHz recommended)

System Requirements
Display resolution: 1440 × 900px or 1280 × 960px or higher
Memory: 2 GB RAM


With the Installation Manager, you can select, download and install just the Plugin Alliance products and formats you need for your system. During this initial release, we at Plugin Alliance look forward to hearing the feedback of our valued customers, as your input will help shape future versions of this utility.