Klevgrand Revolv Review: Why I Put My Coworkers in a Swedish Sauna

If you read my Selfish Audio Guide , you know I am a control freak about the audio coming into my headphones.

One of the biggest, unspoken causes of “Zoom fatigue” is acoustic whiplash. Your brain is trying to process a conversation between Dave (who is shouting in a tiled kitchen), Sarah (who is whispering in a dead, carpeted closet), and the intern (who is working from a bustling coffee shop). In the real world, your brain uses room acoustics to anchor you in space. On a VoIP call, that spatial reality is shattered, and your brain has to work overtime to stitch it all together.

My solution? I hijack the incoming audio using Rogue Amoeba SoundSource and force all of my coworkers into the same physical room.

To do this, I use a fantastic, slightly absurd plugin called Revolv by one of my all-time favorite developers, Klevgrand .

What is Convolution Reverb?

There are generally two ways to make an artificial echo:

1. Algorithmic: You use complex math and delay networks to fake the sound of a room.
2. Convolution: You go into a physical room, pop a balloon or fire a starter pistol, and record the echo. This recording is called an Impulse Response (IR). It acts as an acoustic “fingerprint.” The plugin then takes your dry audio and mathematically wraps it in that fingerprint.

Convolution reverbs are incredibly realistic because they aren’t faking the physics; they are using actual recordings of physical spaces.

Enter Revolv (A Time Machine for Audio)

Klevgrand teamed up with Swedish sound designer Oscar Björk, who traveled all over Sweden capturing the acoustic fingerprints of over 100 historical and modern locations.

They packed all of these IRs into Revolv. The developers proudly boast that there is absolutely zero AI involved in this plugin. It is just pure, meticulously curated acoustic reality.

The Interface: Death to Spreadsheets

If you have read my reviews for Brusfri or Korvpressor , you know that Klevgrand refuses to make boring interfaces.

Instead of a dry spreadsheet of IR files, Revolv features the “Wheels of Time and Space.” You get six distinct wheels to spin: Ruins and Nature, Historical Halls, Odd and Ethereal, Modern Gatherings, Wooden Rooms, and Stages. You literally spin the wheel, select a location (like “Uppsala Cathedral” or “Cozy Cafe”), and your audio is transported there. You can even choose which of the various incredibly expensive microphones (like a Neumann U87) you want to “listen” through. It is visually stunning and practically idiot-proof.

But my absolute favorite feature is something completely non-technical: the written descriptions. Every single impulse response comes with a short, beautifully written blurb detailing the physical space, its history, and its unique acoustic properties. Sometimes, while I’m sitting around waiting for code to compile or a deployment to finish, I’ll just open Revolv, spin the wheel to a random location, and read the description. It’s genuinely fascinating, and it’s honestly one of the main reasons I find myself reaching for Revolv over something hyper-efficient like FabFilter Pro-R 2.

The “Roam Office” Strategy: Acoustic Glue

Let’s be clear: Revolv was designed for film composers, sound designers, and music producers. I am using it to make people sound less annoying. You do not need to do this.

Here is how I set it up for a daily stand-up:

1. The Host: I open SoundSource and pin “Microsoft Teams.”
2. The Dynamics: I drop Korvpressor on the chain to level out everyone’s volume.
3. The Room: I put Revolv at the very end of the chain.
4. The Setting: I spin the wheel to the Modern Gatherings or Wooden Rooms categories. Then, I usually select something small and tight, like a wooden sauna or a small cafe.
5. The Secret Sauce (The Mix): I turn the “Mix” knob down to 5% or 7%.

This is the crucial step. You do not want your meeting to sound like it’s happening inside a medieval cathedral. You shouldn’t actually hear the reverb as a distinct echo. It should be sub-perceptual.

But at 5%, that tiny splash of shared acoustic space wraps around everyone’s disparate microphones. It acts as “Acoustic Glue.” It tricks your tired brain into believing that Dave, Sarah, and the intern are all sitting around a wooden table in a small room with you.

The harsh edges of their cheap laptop mics get softened by the virtual room, and the listening fatigue drops dramatically.

The Drawbacks

Is it perfect? No.

1. The CPU Hit: Convolution reverb involves a lot of heavy math. While Klevgrand has optimized Revolv beautifully, it still uses more battery and CPU than a basic algorithmic reverb (especially in SoundSource, which tends to create multiple instances of the plugin). If I am working entirely off my laptop battery in the RV, an unnecessary reverb plugin is probably the first thing I’m going to close.
2. Price: At $69.99, it is an expensive tool if you are only using it to glue a Zoom call together. Though, like all Klevgrand stuff, it goes on sale, and you should wait to snatch it then. It tends to drop to around $35 if you don’t pick it up in a bundle. But again, it’s Klevgrand, so you never know when it might be included as a freebie with something else.

The Verdict

Adding reverb to a VoIP call sounds counter-intuitive, but it is one of the best “quality of life” hacks I have discovered for remote work.

Klevgrand Revolv makes this process visually engaging and acoustically flawless. If you dabble in music production, this plugin is an absolute no-brainer for lush, realistic spaces. And if you are just tired of getting a headache during your weekly syncs? It might be the best $70 you ever spend to put your coworkers in a Swedish sauna.

Buy Klevgrand Revolv Here