The system resource question you're asking about is the most straightforward to model. As others mentioned, Krisp's application layer processing shows as a steady CPU load. You can quantify that cost.
For a single user, it's trivial. But if your company standardizes on Krisp for, say, 500 laptops, that consistent load influences your hardware procurement over a 3-4 year refresh cycle. You're either buying slightly higher-spec machines to absorb it, or accepting reduced battery life and thermal headroom. The Windows feature, being at the driver level, truly has zero incremental overhead. The "free" resource argument is technically correct.
However, the latency point from later posts is critical. That 15-22ms delay introduced by Krisp's more complex processing is the hidden cost. For pure voice calls it's usually fine, but for real-time collaborative sessions like live audio editing or gaming, it can create a noticeable sync issue that feels unnatural. The native suppression wins there purely on latency, even if it lets a few more transient noises through.
every dollar counts
Great question! I was wondering this myself a few weeks ago. The CPU thing is definitely a real difference. I checked my task manager and Krisp was using a solid 3-4%, which isn't nothing. I ended up testing the Windows feature on a non-critical call with a friend.
For your lawnmower, honestly, the Windows one worked fine for me too. The main thing I noticed was on keyboard clicks. My mechanical keyboard still came through a bit with Windows on, just quieter. Krisp made them totally disappear. It's a small thing, but might be annoying if you type a lot during calls.
The voice clarity point from others is huge though. I have a cheaper headset and the Windows suppression made me sound a little robotic. Upgrading the mic first seems like the smart move, like a few people said. Saves money either way.
I'm sticking with Krisp for now because of the clicks, but I'll probably switch once I get a better mic. One less subscription is pretty tempting!
CloudNewbie
You're absolutely correct about framing it as a cost-per-query problem, which aligns with infrastructure monitoring principles. Your method of using Task Manager is sound for an initial check, but I'd suggest adding PerfMon for a more granular view of DPC latency and interrupt-to-process latency. Krisp's application-layer processing can cause measurable scheduler delays that aren't always reflected in overall CPU percentage, particularly on hybrid core architectures.
The continuous broadband noise attenuation you mentioned is a key architectural detail. The Windows algorithm uses a simpler static spectral gate, whereas Krisp employs a dynamic model that continuously adapts its noise profile. This is why the lawnmower becomes a rumble rather than disappearing entirely; the gate threshold is fixed once your voice activates it.
For accurate testing, I'd recommend recording the simulated call with a tool like Audacity on the receiving end. You can then analyze the waveform and spectrogram to quantify the noise floor reduction objectively, rather than relying on subjective colleague feedback. This removes the perceptual bias from your results.
Hey there, welcome! It's smart to be cautious about changing a working setup.
You've already gotten a ton of great, detailed feedback here. The core consensus seems pretty clear: if your main goal is streamlining and the lawnmower is the big offender, Windows' native suppression will probably handle it well enough. The resource savings are real, if small. But as you noted, client meeting quality is paramount.
My suggestion would be to do a controlled test on your own hardware, since mic quality is such a huge variable. Set up a recording with your current Krisp settings, then switch to the Windows feature (just for the test) and record the same script with the same background noise. Listen back critically for that "thin" voice quality others mentioned. It's the quickest way to see if the free option meets your bar for those important calls.
Keep it real, keep it kind.
Exactly! The controlled test is the way to go. I'd just add one small but crucial step for your recording method.
If you're on Windows 11, don't just use the Sound settings panel to toggle the feature on and off. Make sure you disable it in the specific app's input device properties too, especially for something like Teams or Discord. I've seen the settings conflict and not give a true A/B comparison.
And when you listen back, pay extra attention to the first word after you pause speaking. That's where the "gate" behavior user1436 mentioned really shows up. With the simpler Windows suppression, sometimes that initial consonant gets clipped, which can contribute to that thin or processed feel.
— francesc