Waves Clarity Vx vs. iZotope RX: Which One Actually Kills Room Noise?

Most people reach for the wrong tool for room noise. They load a broadband denoiser, push the reduction until the hiss disappears, and wonder why the vocal now sounds like it’s coming through a wet sock. The mistake isn’t the plugin. It’s treating “room noise” as one problem when it’s really several, and expecting a single box to solve all of them.

Waves Clarity Vx and iZotope RX get compared constantly, and the comparison is usually framed badly. One is a fast, AI-driven vocal cleaner built for music sessions. The other is a repair suite that happens to contain some of the best spectral surgery tools on the market. They overlap on exactly one job: pulling a usable vocal out of a noisy recording. Everywhere else they’re barely in the same category. So the useful question isn’t “which is better” but “which one matches the noise you actually have.”

What Clarity Vx is genuinely good at

Clarity Vx is a one-knob-plus-a-bit proposition. You feed it a vocal, it separates voice from everything else using a trained model, and you dial in how aggressive you want to be. There’s a reason it caught on fast in home studios: it doesn’t ask you to understand spectral repair. You don’t draw anything, you don’t select a noise profile, you don’t audition algorithms. You turn it up until the room falls away and the voice still sounds like a voice.

That speed is the whole point. If you’re tracking vocals in an untreated room and the singer is good but the space is fighting you, Clarity Vx will get you 80% of the way to a clean, releasable take in under a minute. For music work, that’s the deal. Broadband noise, fan hum, computer whine, the general wash of an unremarkable room, it handles these with a speed that no manual spectral tool can match.

Where it struggles is the same place every broadband model struggles: when the noise isn’t broadband. A single sustained tone, a buzz, a click, a plane going over, these aren’t what the model was trained to remove cleanly. Push Clarity Vx hard on tonal noise and you start hearing artifacts, a kind of underwater warble on the consonants. It also doesn’t care about your edit points. It processes, it doesn’t repair.

What RX actually does differently

iZotope RX is the tool post-production people reach for when a take is the only take and it has to be usable. Its strength isn’t a single clever algorithm; it’s a collection of surgical processes you apply deliberately. Spectral Repair lets you redraw a damaged region by hand. De-hum targets harmonics. De-click and De-crackle are specific tools for specific problems. The Voice De-noise module is the closest thing RX has to Clarity Vx, but it expects you to learn a noise profile and tune the reduction in bands.

That’s more work. It’s also more control. When a vocal has a broadband hiss and a fluorescent-light buzz and a chair squeak at 0:42, RX is the only one of the two that will deal with all three without compromise. Clarity Vx will flatten the hiss and leave you with the buzz, which you then have to chase with a separate EQ notch.

Worth saying plainly: RX is a bigger, slower, more expensive tool, and for a musician tracking their own vocals it’s frequently overkill. You can spend a whole evening learning RX’s spectral editor and still reach for Clarity Vx on the next session because it’s faster and good enough. That’s not a knock on RX. It’s just that they’re built for different jobs.

The question that actually decides it

Before you pick, listen to what’s under the voice and answer one question: is the noise steady and broad, or is it made of specific events?

• Steady broadband wash (room tone, HVAC, computer fans, distant traffic): Clarity Vx, almost always. Faster, cheaper, and the artifacts are less objectionable than a mis-tuned denoiser.
• Specific tonal or event noise (hum, buzz, clicks, a single loud transient, a siren): RX. Manual spectral tools are the only honest way to remove these without gutting the vocal.
• A mix of both: use both. Clarity Vx first for the broadband bed, then RX for the surgical leftovers. This is the workflow most working engineers actually use.

That last point matters more than the head-to-head framing suggests. These two aren’t really competitors in a real session; they’re stages. Clarity Vx is a fast first pass. RX is the cleanup that catches what the model couldn’t. If you own both, you stop thinking about which one wins and start running them in sequence.

Where the “room noise” label gets misused

Here’s the part that doesn’t get said often enough: much of what people call “room noise” in a plugin context isn’t a plugin problem at all. It’s a room problem. If your recordings carry a persistent low-mid buildup or a boxy resonance, a denoiser will remove the noise and leave the room perfectly intact. Clarity Vx and RX both do exactly that. They remove what isn’t voice; they don’t fix what the room did to the voice.

This is why measurement-minded installers get impatient with the “which denoiser” conversation. A few well-placed absorbers and a proper listening position will do more for a recorded vocal than any amount of post-processing, because they change what the mic captures in the first place. Plugins are the cleanup crew, not the construction crew. If a treated room gets you a clean take, Clarity Vx has almost nothing to do and RX has even less. That’s the ideal outcome, and it’s the one you get by fixing the space first.

The same logic applies to monitoring. If you can’t reliably hear the noise floor in your room because your speakers and seat aren’t telling you the truth, you’ll under- or over-process every take. Get the monitoring and the room right and the plugin decision becomes much less fraught.

My verdict

For music work, Clarity Vx wins on the job it’s built for: fast broadband vocal cleanup with minimal fuss. It’s the right first call for most home-studio singers, and its speed is a real, measurable advantage over manual spectral editing.

For repair work, RX wins outright, and it isn’t close. If the noise is tonal, event-based, or genuinely difficult, RX is the only one of the two that will do it properly, and the investment of time pays off on the takes that matter.

If you’re choosing one and only one, buy the one that matches your noise. If your problem is a steady hiss, Clarity Vx. If it’s a specific ugly sound you have to remove from an otherwise good take, RX. If you can afford both and you record in a home room, run Clarity Vx as the first pass and RX as the cleanup, in that order, and stop treating them as rivals.

And then go measure the room. The best denoiser on the market is a treated space that never gave the plugin anything to remove.