Every major mixing console from brands like SSL, Neve, etc. has dedicated HP & LP Filters per channel. There is a reason for that.

Brainworx founder and CEO, Dirk Ulrich, has always emphasized the importance of accurate High Pass & Low Pass Filtering when treating frequencies in a mix. 

During his long-lived days as a producer and engineer, working with acts and members of acts like 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. He figured, that by simply filtering out the spectrum 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 EQ treatment.

It was on this principle that Dirk designed the bx_cleansweep V2, a simple yet powerful hybrid High-Pass and Low-Pass Butterworth filter that implements gentle curves (6 dB per octave) in order to achieve a musical and non-intrusive 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 many other EQs.

Now, bx_cleansweep PRO is the third reincarnation of the beloved filter plugin!

Sporting the addition of five filter types 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.


  • Joint HP/LP filter with in-depth frequency response control
  • In addition to Butterworth, five new filter types with additional control options:
  •  (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 
  • Joystick/matrix controller manipulates both HP and LP filters on an X/Y plane, creating an intuitive interface for honing-in on character

Audio Examples

Industry Reviews

  • Jody Wisternoff

    Jody Wisternoff

    Way Out West

    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

    Paul McCartney, David Arnold, Sonos

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

  • Thomas Gold

    Thomas Gold

    Producer/DJ (Armada, Axtone, Protocol, Revealed)

    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

    Producer (Freemasons, F9 Audio)

    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

  • No brainer filter

    by Tim
    This filter does what it says it will - provides a variety of high and low pass filters which can be effortlessly tweaked to your taste. The range of filter shapes is broad, and the controls are… Read More
  • Bx cleansweep

    by Calton
    It’s a great plugin, thanks
  • Easy to use and sounded great

    by Alen
    It’s a perfect little monster to mask your track. Sounded clean and natural. And the preset are great!!
  • bx_cleansweep

    by oekoumene
    Solves problems you never knew you had! A great tool to use while tracking, loads with the 2 filters already engaged on their lowest setting, saving a few clicks every time.
    A real problem… Read More
  • bx cleansweep pro

    by Stamatis
    Very well sounding and customizable. The simplicity of its job should not make it underestimated. I use it on practically every channel, it delivers quality and a speedy workflow, with enough options… 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 10.9 through 10.13
Windows 7 through 10
Pro Tools 10.3.10 or higher or most VST/VST3/AU-compatible hosts 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


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