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Big Beautiful Door


(30 customer reviews)

Note for M1 Mac Users: This plugin is not yet compiled to work natively on M1 Macs. We are currently in the process of rewriting it so that it will, but it will take some time. In the meantime, it should work under rosetta on M1 Macs.

Taking a unique, streamlined approach to dynamics processing and equalization, Big Beautiful Door enables you to process vocals, clean up noise, manage low end, gate drums, spice up pads, and more, in ways no other plug-in or combination of plug-ins can.

Available Formats






  • Separate EQ for loud and quiet sounds
  • Advanced Sidechaining
  • Intuitive Interface

If M.C. Escher* built a house, it would have a Big Beautiful Door—one that lets you in at the same time it lets you out. In musical terms, Big Beautiful Door is a uniquely useful tool for both problem-solving and creative applications. BBD combines two equalizers with a gate and advanced sidechain capabilities that enable you to equalize different portions of a sound separately. Imagine being able to cut harsh consonants only as they occur while bringing out the air in vocals without increasing sibilance. That becomes the reality you enter through the Big Beautiful Door. But that’s just one place it can take you. Not only is the BBD the most powerful vocal EQ available, but it also gives you the ability to remove guitar-amp hiss from power chord decays, clean up the low end, manage bass and kick frequencies via ducking, add both rhythmic and tonal movement to pads, and more. Big Beautiful Door is easy to use and gives you results that multiple plug-in chains can’t achieve.

Big Beautiful Door—Just the Facts:

  • Combines a gate with two 3-band equalizers
  • Equalize loud and quiet sounds separately
  • Selectable internal/external sidechain and sidechain listen function
  • Equalizers feature selectable slopes, along with gain, frequency, and variable resonance controls
  • Individual solo for each EQ section
  • Dual-mode sidechain filters for accurate triggering
  • A/B bank comparison mode
  • Factory presets and user preset save and recall
  • Supports VST2, VST3, AU (Mac only), RTAS, AAX Native on Mac and Windows

*M.C. Escher is one of the world’s most famous graphic artists, known for his “impossible” constructions, such as Ascending and Descending and Relativity. Escher once said, “Only those who attempt the absurd will achieve the impossible. I think it’s in my basement… let me go upstairs and check.”

Big Beautiful Door—Cracking the Code

Like all Boz Digital plug-ins, BBD is the result of trying to achieve real-world audio goals after attempts with existing plug-ins failed to produce the desired results. As such, Big Beautiful Door takes a novel approach to dynamics and EQ processing not found in any other plug-in. Neither a gate, compressor, or dynamic equalizer, it can act like all three. Plus, it has a few unexpected tricks up its sleeve. Its most unique feature is that you can EQ your opened and closed gate separately.

The Controls

The BBD has a threshold slider that controls the level at which the gate opens and closes. To prevent gate chatter, there’s a 3dB hysteresis set into the threshold. However, there’s also a variable hysteresis control if you require additional control. (Hysteresis keeps the gate open below the threshold by the set amount.) There are also buttons that let you hide the EQ controls and display input-level history and the state of the envelope, which helps you dial in threshold and view how your sound is being affected.

Along with standard envelope controls, including attack, release, hold, and ratio, the gate has a look-ahead feature. Look-ahead lets you step through Big Beautiful Door into the future. It opens the gate before the level crosses the threshold, which enables it to pass transients unaffected. This feature comes in handy for gating drums. Using look-ahead in concert with a slow attack provides much smoother gating results.


Using its advanced side-chaining, which controls the way Big Beautiful Door reacts to the input signal, you can EQ out the low end of your bass when a kick drum hits or attenuate the midrange of backing tracks when the vocals come in—easily and without automation.

Big Beautiful Door lets you isolate consonants from vowels and EQ them separately, which makes it arguably the worlds most powerful vocal processor. For example, if you’ve ever spent an inordinate amount of time trying to tame sibilant buildup in background vocals, which can sound like a leaking steam vent, BBD can eliminate it across multiple tracks while maintaining a natural sound. Plus, you can boost the highs of background vocals to make them stand out in the mix without affecting sibilance.

Big Beautiful Door can also clean up noisy guitars and low end, remove drum bleed in the form of cymbals or singing toms, and add rhythmic and timbral interest to pads—and that’s just for starters.

Download a demo of Big Beautiful Door and step into a new world of audio processing.

30 reviews for Big Beautiful Door

  1. fruc

    This has to be the most sublime gating tool on the market. End of review. It has no peer to compare with. Thats the TL;DR. Read on, if you care…

    One thing this plugin excels at is the visual feedback. It’s got visual feedback for the signal you are adjusting, but it’s got great feedback for the more ‘meta’ elements you will be adjusting as well. One thing just about all Boz plugins do better than everyone else is encapsulating all that important information in a way you can understand, and more importantly in a way you can read at the same time without getting confused or overloaded. This plugin does this again better than most. No small feat.

    One can use this tool as a ‘tool’ or one can use this ‘tool’ as a ‘toy’. It can be surgical if that is what is required or it can be more wide-ranging, shall we say, when you just want to muck about and get something a bit more ‘creative’ out of the mix. It pays dividends on both fronts.

    Make no mistake, this is a serious tool for anyone that takes the time to learn it. With that unique mix of features that only the wild mind of Boz can bring to bear in such an easy to use format. More than easy to use – fun!

    I have Gatey Watey as well. That’s a gate. It’s a great gate! In all honesty, whilst that might be simpler in design, I still find it a bit harder to dial in than Big Beautiful Door. That feedback counts for a lot. No, you shouldn’t be looking at that interface when you are EQ’ing things – naughty naughty – don’t do that again! And you probably don’t need to look at an interface when you are dialing in reverb. But for the kind of intricate tasks this tool might be used for, that visual feedback, so exquisitely presented, goes a long way to getting you 90 percent of the way to finishing your task pretty quick. The rest you need to finesse for yourself, if you really have to…

    Another sublime tool/toy. Really a lot of fun. Really a joy to use.

    But don’t mistake kindness for weakness.

    This is a big heavy hitter of a tool when no other tool can be found to do the job at hand. When all the other Gates are hiding under their beds, shaking in their boots, BBD got you fam! It doesn’t need to come out all guns blazing, more a slow steady stride.

    If I may be so bold, perhaps one of Boz’s finest masterpieces. And that’s saying a lot.

    That’s what I think any way.

  2. kevinsparks

    I’ve always hated how gating a snare drum would result in a big blast of hi-hat treble when the gate would open. With separation eq’s for open and closed positions, this is the perfect solution to allow higher frequencies through at all times to avoid that magical appearing hi-hat

  3. nilsyngve

    Far beyond gating, this is an incredible tool.
    It gives so much scope for dealing with sounds above and below threshold levels. Anything from cleaning up multi mic drum takes to mad creativity with whatever you throw at it. It can be seen as a creative filter or a gate, entirely your choice.
    As with all Boz stuff, you can use many instances without sonic degradation.
    Love it.

  4. an-dean

    Big Beautiful

    Is a unique Gate that give full control not only behinde the “Door” and the Door itself.

    It give full control for what going on in front of too 👍
    (So the control of the Sound in betreten is your’s too)

    The sitting of the knobs and Buttons ar nice and selfexplanatory

    The Sound you make with Big Beautiful Door is indeed YOUR’s
    (House with frontgarden and doorframe)

  5. Chrisc_o

    Very useful and original plugin. Constant request to authenticate on Mac (AAX). Still waiting for response from support request. Kudos nonetheless.

  6. BenRicoMusic

    I really like the potential of Big Beautiful Door. I’ve used it now a handful of times during the mix process to get a better handle on the level balance of cymbals in a busy rock track. I can only imagine the countless ways I will be using this plugin in the future. Great job BOZ!!!

  7. chronicaudio

    Boz Digital brings the heat! I started with the Wall, picked up Transgressor (just when I thought I didn’t need another transient designer), and now Big Beautiful Door. I haven’t used it a ton, but I love the possibilities!


  8. YamilRMartinez

    Big Beautiful Door is a intelligent evolution of an long forgotten tool in the studio. This evolution place so much power in a problem solving tool that makes it a creative tool too. Impressive…. I only wish that it can do some ducking to make it perfect within its simplicity.

  9. YamilRMartinez

    Big Beautiful Door is a intelligent evolution of an long forgotten tool in the studio. This evolution place so much power in a problem solving tool that makes it a creative tool too. Impressive…. I only wish that it can do some ducking to make it perfect within its simpliicity.

  10. guitar_guy182_

    This is a fantastic plugin, very flexible and powerful. Unlike transgressor, Big Beautiful Door responds purely to volume, and allows you to EQ loud volumes differently to quiet volumes in a very intutive way. It has replaced all other gates for me, and highly recommend for others to demo!

  11. Chucaro Albaradize

    A very unique tool that opens up a endless world of possibilities, some more obvious than others. It will provide you what no other tool can. A must have for me, and the price is more than reasonable.

  12. Kyle Sheppard

    Another great tool from Boz! I’ve used Big Beautiful Door to reduce vocal sibilance and bleed in drum mics. I’m sure there are even more uses for it!

  13. Randyrocker

    Those two buttons that do nothing, should be used to link Transgressor and the Wall to synchronize with Big Beautiful Door, so settings affected on either harmonized unit mesh together in linked adjustments. It came to me when I heard an adjustment on one effected the sound of the other and I thought why can’t the plugin be doing this.

  14. wjcurtis

    BBD is proven itself incredibly useful as a De-Esser, but I’ve also found it really cool for frequency-dependent effects on drum and synth loops by being able to tailor what happens on the top or bottom end. Of course you can do this with an EQ, but having gating built-in yields some unique effects without a lot of fuss. It’s become my first choice for sibilant taming, and another tool in the toolbox for some creative possibilities. Once you play around with the demo, you’ll want this in your arsenal. 🙂

  15. coachsgilliam

    I think the plugin is a very innovative tool. I just wish there were more useful tutorials so I can get more use out of it. But keep giving us great products!!!

  16. nathangamble

    Absolutely love it! Fantastic gate, very creative. My go-to for gate and sidechaining.

  17. pfsmith0

    Very flexible and useful for a variety of dynamics-based EQ effects. I’ve only scratched the surface of what this can do, but it really scratches the creative itch. The tutorials are a great way to get you going on the various uses this can have.

  18. ptahjay

    Well made and extremely versatile/adaptable plug in. From filtering to advanced styles of gating, this plug in is my go to gate over most other plug ins. If you see this on sale, id HIGHLY recommend getting this plug in or at least trying out the demo.

  19. Sven Engdahl Hamilton

    Along with Transgressor, this has truly become my go-to for getting kicks and snares sound a lot better than they were actually captured. Like a magnifying glass for drum sculpting, they greatly diminish the need for sample replacements further down the mixy rabbit hole.

    As far as gates go, BBD is it. Recommended!

    PS. Feature request wise for v2 (Bigger Beautifuller Door), I wouldn’t mind some sort of dynamic EQ magic in the Sidechain section, for an even smoother approach to those overly spilly yet largely dynamic tracks, you occasionally get to work with.

  20. bgrotto

    Outstanding gate. One of the finest drum shaping tools I’ve ever used (and I’ve used most of em!). Indispensable and a total game-changer.

  21. Daveweir

    I have had Big Beautiful Door for around a month now. The thing that really annoys me about it, is that I DIDN’T HAVE IT EARLIER! This thing is so good on snare to remove hihats from the decay of the snare, Toms with cymbal bleed & cymbal spill on a live vocal etc. The fact that it doesn’t just gate the signal means that you can use the built in eq filters to shape how the decay or the below threshold signal sounds compared to the above threshold signal.

    I have now gone back and chucked it on troublesome tracks from previous projects and have had instant gratification along with anger at how long I had spent originally on a mediocre result.

    Thanks guys, keep making stuff like this and I’ll be broke……….broke but happy………

  22. drgbhinson

    Works very well for what it does. Its a go to for unique transient shaping.

  23. dominique.bassal

    Nice plugin, very effective on already very percussive material, with dynamics not varying over medium / long time. Which means pop music, really commercial, really formatted. Other than that it suffers the same problems as other similar propositions, like Eventide’s, or even Sonnox’s Dynamic EQ’s “onset” detection : the lacks in the threshold adjustment renders them at best capricious and unpredictable. A nice example on how the niceties brought about by the tools themselves can unfluence the musical outcome in favor of the already dominant cultures.

  24. Mdjagg

    This is an amazing start to an innovative processor. If you know what it does, then you’d have realized what a novel and new approach this is to adding movement to a sound source, it’s cool. What I’d like to see in V_2.0 though is 5 EQ bands and independent gain comtrol per side. Also, what would really make this plugin special would be the ability to output separate signals via the DAW’s output. For instance, if you could output the “Above threshold” signal to Bus 1, and “Below threshold” signal to Bus 2. It’s possible to do this by duplicating the Chanel and muting/soloing opposite sides, but if this feature was built in, it would allow for unlimited control and coloring of the movement that you’re able to create with BBD. For that, Id give it 6/5 stars.

  25. Michael Foreman

    This plugin, like Transgressor and Manic Compressor before it, just hits it out of the park – in particular the EQ section. There’s just something about Boz’s EQs. They are so powerful yet transparent, limited (3 bands) yet all you need. The only thing missing is my own creativity in finding unique ways to use this one. That’ll come with time. This plugin is ready for however you can imagine using it, for sure.

  26. Kasinski

    Pretty hot stuff. Used it in a send/return recently, to help bring out a ride cymbal drowned out by noise. Works like a charm, really. Very straightforward, wonderfully designed, and immediately usable. Besides its more technical uses, the ease with which you can get BBD to lend movement to all sorts of different signals should really get you to fork out whatever money is needed.


  27. Wyatt Avery

    Definitely a fantastic tool from Boz. I’ve never used anything like it.
    It brings a lot of new possibilities to contour a sound. Super flexible, tools like this are the future. Thanks Boz!

  28. Nikolai Yonker

    Big Beautiful Door is the evolution of the gate/expander. It does all the usual gate stuff just fine, but why would you want to carve out all the audio when you don’t need to. Frequency specific gating helps sculpt your audio to where you want it to be. However, this is not just for the tasks of making space in the mixes frequency spectrum….. but an extremely creative tool to give your pads, leads, etc some beautiful movement (especially when being triggered by side chain).

    I enjoy tools that opens me up to new possibilities and Big Beautiful Door definitely puts a smile on my face every time I use it.

  29. SenseiZytus

    Just like Transgressor, Big Beautiful Door takes the dynamic processing into a different-, more flexibel path that I’ve never seen in dynamic processor before. What’s cool with this plugin is that you can carve and cut a sound without loosing the good stuff, something that is not common place with a lot of gate-like plugins and processors. The amount of flexibility and surgical possibilities is just pure awesomeness.

    Big Beautiful Door is a real innovation. I’m looking forward to Boz next plugin release too see what kind of mad scientist functionality he’s incorporated.

  30. Randyrocker

    Fantastic! Just changed my listening patterns and oh what a surprise for anyone who buys this sound changer. Magnificent workmanship indeed!

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