Bedroom Producers Blog is proud to release BPB Dirty Filter, a freeware tube distortion effect in VST, VST3, AU, and AAX plugin formats for digital audio workstations on PC and Mac.

BPB Dirty Filter is our little gift to Bedroom Producers Blog readers and the music production community as a whole. I launched BPB a little over ten years ago and I enjoyed sharing the news about freeware VST plugins and music production software ever since. This time, BPB’s own VST plugin is in our news section and I couldn’t be happier.

See also: Best FREE Distortion VST/AU Plugins

Of course, none of this would be possible without our readers. Thank you all for your support and for reading Bedroom Producers Blog. And if you’re new here, welcome and subscribe to our newsletter to stay up to date with the latest news!

BPB Dirty Filter by Bedroom Producers Blog

Here’s a closer look at BPB Dirty Filter.

So, you can download BPB Dirty Filter for free from our website and use it as a distortion effect in your favorite DAW. Check out the demo video below for a quick look at the plugin and its features.

What Is BPB Dirty Filter?

BPB Dirty Filter is a dual filter effect with tube distortion. It features a high-pass and low-pass filter, a Slope control (12, 24, 36, 0r 48 dB/octave), a Mix knob, and Volume control. However, the most important parameter is the Drive knob which controls the resonance for both filters and the amount of tube distortion that is applied to the signal.

By boosting the Drive knob, the user adds resonance and distortion at the same time. As a result, BPB Dirty Filter sounds somewhat similar to a multi-band distortion effect. This is because the cutoff frequency will be distorted the most and the user can focus the distortion around a specific area of the signal.

How To Use BPB Dirty Filter?

There are many ways to use BPB Dirty Filter as a standard filter and a distortion effect.

With the Drive set to zero and the Slope set to 12 dB/octave, you can use BPB Dirty Filter as a gentle transparent filter for removing low-frequency hum or high-frequency noise.

Set the Drive to 35 and the low-pass Cutoff frequency to around 45 Hz to add thump to a kick drum. The same can be done to snare or any other percussive instrument. Experiment with different Mix values to find the perfect amount of distortion for your drum loop.

Of course, you can always go bonkers with BPB Dirty Filter. Set the Drive to 100 and increase the slope to enjoy complete audio annihilation. Again, the Mix knob is your friend if you want to get some of that crazy distortion without completely destroying the incoming audio.

Download BPB Dirty Filter

You can download BPB Dirty Filter for free exclusively from Bedroom Producers Blog. The software is completely free to use in your DAW for any commercial or non-commercial purpose. We are providing the plugin as-is without any express or implied warranty.

BPB Dirty Filter is available in VST, VST3, AU, and AAX plugin formats for digital audio workstations on PC and Mac. Both 32-bit and 64-bit plugin hosts are supported. Visit the product page below to download your free copy of the plugin.

UPDATE: Some browsers and AV software detected the EXE installer for BPB Dirty Filter as a threat. Don’t worry – the plugin is 100% clean and this often happens with new EXE installers. We submitted a false positive complaint and this should be fixed soon. In the meanwhile, you can now download the manual installation files, too (no EXE installer).

More info: BPB Dirty Filter

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About Author

Tomislav is a music producer and sound designer from Belgrade, Serbia. He is also the founder and editor-in-chief at Bedroom Producers Blog.


  1. Thank you sooo much sir gonna download it now , i know it won’t dissapoint cuz BPB plugins are allways great and free :))) thank you soo much once again !!!

  2. Tomi! Your contribution to the creative community is massive… The amount of valuable information you have been pouring for 10 years is incomparable… I’ll just take this plugin as a cherry on a 10 ton cake…

    • Tomislav Zlatic


      Hey, thank you so much for the kind words! Happy to share something great for free as a big thank you for all the support over the years. :)

    • Had more time to test it, it’s one of the sweetest sounding virus out there. Clean but not boring flat GUI. Well laid out too, a joy to use. No zipper noise when automation is used. Kudos on the inclusion of 36 and 48db filters, often overlooked values.
      Ideas for a possible v2: Pan control of the wet signal, ability to only affect the mid or sides and an automatic hydro-alcoholic gel dispenser.
      Wait… Plugin, I meant plugin.

  3. Richard Bergman


    Hi Tomislav.
    Awesome initiative, and as always great website which I visit on a daily basis. I look forward to try out the plugin, but it’s already obvious what great potential BPB has a brand, and I look forward to see what the surprises that awaits in future. Godspeed in both the mainstream and the underground scene, and have a great day!
    Best regards

  4. Hi Tomislav & BPB team.
    Wishing you a very happy 10 year anniversary & well done 🎂😊👍 Respect BPB
    Best wishes for the future too.

    This BPB Dirty Filter sounds very nice in your video while played on my sound system, especially the distortion you added onto that drum loop, it has an awesome sound when added in the bass drum.

    I look forward to trying it out with two Dirty Filter plug-in’s in one channel strip (one for the bass to distort the bass drum & one for the treble, adjusted separately)
    It would be awesome to be able to automate this plug-in as well & even have a split channel audio file for left & right with it added for the treble, endless possibility’s 👍

    Thanks so much Tomislav, for all of your kind offers, i very much appreciated them all, even if i don’t need them all, but as well for your hard work, time & your great write ups about the products that you share with us all.

    Kind regards all

    • Tomislav Zlatic


      Thank you so much for the kind words! As for BPB Dirty Filter, I wanted it to be a simple hands-on plugin without too many features, but I’m definitely listening to the suggestions for the next version. I’ll add your suggestions to the list. Much appreciated! :)

    • Hi! Eager to try this out. Maybe late to the party with this comment/query.

      Why not simply offer the plug in as a dll instead of exe?

      I have never understood why developers do that, unless they wanted to include unrelated software.

      Obviously, that’s probably not the case here. Maybe there are dependencies that are included within the exe?

      In any event, thanks for your contributions to the plug in community!

  5. Thanks for all the awsome freebies over the years, BPB has been a great source of info and goodies. Here’s to 10 more !!

    • Tomislav Zlatic


      Yeah, you can get many types of distortion out of it, even though the controls are simple. And thanks for the kind words!

  6. SneakyElkInSneakersEatingSnickers


    This will definitely come in handy, thanks a lot BPB! And keep up the awsome work Tomislav, this blog is super!

  7. Thanks for this awesome plugin!

    Love the sound of the drive and res combo when you play a sawtooth through it! Very nice indeed!

  8. So many thanks Tomislav! For the web site, building the community, offering information, and the new Plugin.
    You inspire me to create, and to want to also give.

  9. Added some nice soft top end to a acoustic guitar pleasing on a vocal track i like it next i have to try it on bass and drums but i think i will be using it a lot very easy to use i like the filters thank you

  10. Thank you Tomislav for this great filter, it works flawlessly, much better than many commercial ones. Great job as always. Once again thank you BPB

  11. Thanks BPB! Is this essentially the same thing as the free BPB FilterCrusher plugin from a few years back? I remember loving that thing but it had some stability issues that sometimes messed up sessions. Looking forward to using this guy though.

    • Tomislav Zlatic


      Cheers! No, this is a completely new plugin. It’s based on a similar concept, but it uses entirely new code. No stability issues with this one. :)

  12. Thanks for the freebie. Always loved your work on BPB since the beginning. 10 years? Time flies… :)

    Wish you all the success, pal!

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