How good is Discord noise suppression, and when is it not enough?

Ten minutes into a raid, the washing machine next door hits its spin cycle. You click the Noise Suppression icon in Discord's voice panel, Krisp kicks in, and the rumble is gone for everyone in the channel. Then the raid ends, you jump on a Zoom call for work, and the first thing your manager hears is the spin cycle. Same Mac, same microphone, same washing machine. The only thing that changed was the app.

That scene answers the headline in miniature. Discord noise suppression is good at one job, and it does that job for free. It is also built into one program, it is aimed at one kind of noise, and it has a habit of switching itself off at the worst moment. Below: how to turn it on, what it removes, why it sometimes eats your voice, why it turns off by itself, and how to tell when you need something that works outside Discord.

The short answer

For steady, non-voice noise in a Discord call (fans, keyboards, a dog, a vacuum, an air conditioner), Krisp inside Discord is a solid, free fix. Turn it on and leave it on if your room is noisy.

It stops being enough in five situations:

• The noise is other people talking, or a TV. Discord says Krisp targets background noise that is not a human voice.
• Your room is already quiet and your mic is decent. Discord's own FAQ warns that voice quality can decline in that case.
• You need the same clean sound in Zoom, Telegram, OBS or anything else. Krisp in Discord stops at Discord's edge.
• Your CPU is busy. Under heavy load Discord turns Krisp off to protect the call.
• Your problem is not noise at all. If friends say you sound thin, boomy, muffled or too quiet, a noise filter will not fix that. If that is your complaint, you want why your mic sounds bad on Discord instead of this page: it covers tone, level and the settings that shape them.

How to turn on noise suppression in Discord

Discord documents two routes on desktop, and both reach the same switch.

From a voice channel. While connected, click the Noise Suppression icon in the voice panel at the bottom left and toggle Krisp on or off.

From settings. Click the cogwheel next to your avatar to open User Settings, go to Voice & Video, scroll to Noise Suppression and pick Krisp.

On the phone app, tap your avatar, then the cogwheel, go to App Settings > Voice and choose Krisp under Noise Suppression. Or, while in a call, tap the channel name and find Noise Suppression in that menu.

The setting is sticky. Once Krisp is on, Discord keeps it on for every new voice chat until you turn it off again, so you do not have to remember it each evening.

The Noise Suppression section offers three choices, and the voice processing section around it holds a few more switches that change what your friends hear. Menu names below are as Discord labels them as of October 2026. Discord moves things between updates, so search the settings page if one has wandered.

Before you change anything, find the Mic Test in the same Voice tab and press Let's Check. It plays your own voice back to you, which is the closest thing Discord offers to hearing what the channel hears.

What Krisp in Discord actually removes

Krisp is a separate company's product, and Discord ships a version of it inside the app. According to Discord's FAQ, the model runs on your own device and nothing is sent to Krisp's servers. A neural network decides, moment by moment, which part of the sound looks like a human voice and turns the rest down.

That design explains both its strength and its blind spots.

It is strong against sound that looks nothing like speech. Discord's own examples are a barking dog, a vacuum and a slammed door. Add a desk fan, a laptop fan spinning up, mechanical key clicks and street hum. These have shapes a model can separate from a voice with confidence.

It is weak against sound that does look like speech. A roommate on the phone, a TV in the next room, a sibling yelling at their own game: to the filter, that is all voice, and voices are what it is told to keep. Discord's FAQ says Krisp works best where the background noise is not human voices, which fits that design.

It only cleans your side. This catches people constantly. If a friend's stream is full of fan noise, turning Krisp on in your client does nothing for it. Discord's FAQ is plain about this: your friends need to switch it on themselves.

Music and singing are a gamble. A sustained note, a guitar chord or a song playing through your mic has a lot in common with "not speech". If you play an instrument on a call or sing in a karaoke channel, switch Noise Suppression to None for that session. That is a description of how the filter decides, not a verdict on any particular take; the Mic Test will tell you quickly whether it is chewing your notes.

Why Krisp sometimes makes your voice worse

Most guides skip this part. Discord's FAQ says that if you are in a quiet environment with a high-quality mic, you may notice a decline in voice quality with Krisp on, and it suggests leaving it off in that case.

The mechanism is simple. A noise filter is always guessing. In a loud room its guesses are mostly right and the result is a big improvement. In a quiet room there is almost nothing to remove, so what you hear is mostly its mistakes: word endings that fade a little early, soft consonants that thin out, breaths that vanish and make speech sound clipped, a room's natural tail cut short. On the other end, that can pass for a bad connection rather than a filter at work.

So the right setting depends on the room, not on how serious you are about audio:

• Loud room, cheap mic: Krisp.
• Medium room, or Krisp sounds processed: try Standard.
• Quiet room, good mic, mic close to your mouth: None.

Test each one with Let's Check, with the noisy thing switched on. Thirty seconds per setting is enough to hear which one keeps your consonants.

Discord noise suppression not working: a checklist

When people search "discord noise suppression not working", they usually mean one of six different things. Work down this list in order; each step takes under a minute.

1. Input Device      Voice & Video > Input Device is the mic you speak into,
                     not "Default" pointing at something else.
2. Option missing    Krisp in Discord needs a Mac with Apple silicon and
                     macOS 12 or later. In a browser, Discord lists desktop
                     Chrome and Firefox only.
3. Wrong side        Krisp filters YOUR mic. Noise from a friend is theirs
                     to filter.
4. Wrong noise       A TV, a podcast or people talking are voices. Krisp
                     is built to keep voices.
5. It switched off   Heavy CPU load turns Krisp off. See the next section.
6. Still broken      Voice & Video > Debugging > Reset Voice and Video
                     Settings, then set Input Device and Krisp again.

Step 2 matters for Mac readers in particular. Discord's FAQ states that on Mac, Krisp requires Apple CPUs and macOS 12 or newer. On an Intel MacBook, Discord does not support Krisp at all, and no amount of reinstalling changes that.

If you have done all six and a friend still says "I can hear your fan", record yourself in the Mic Test while the fan runs. If you cannot hear it in your own playback, the noise is probably reaching the call from somewhere else, such as their side or a second device of yours left in the channel.

Why Discord noise suppression turns off automatically

This one has a documented cause. Discord's FAQ says that when your device's CPU usage is very high, Krisp turns itself off to preserve voice performance and shows you a notice. If you switch it back on without lowering the load, it will keep turning itself off.

On a Mac, that load usually comes from one of three places:

1. The game itself, especially on a MacBook running a demanding title on battery or in a warm room.
2. Go Live or screen sharing, which has to encode video on top of everything else.
3. A browser with too many tabs, a video export, or a sync client chewing through files in the background.

Open Activity Monitor, sort by % CPU, and look at what sits at the top while you play. Closing a browser window or lowering a game's graphics preset is often enough. Discord's suggestion is exactly that: reduce your overall CPU use before turning Krisp back on.

If you cannot reduce the load, switch to Standard. It gives up some cleaning, but Discord's FAQ ties the automatic shutdown to Krisp specifically, and a lighter filter you can keep is better than a strong one that disappears halfway through a match.

The bigger limit: it only works inside Discord

Back to the second half of the opening scene. Discord's FAQ says Krisp is free when you use it with Discord, and for other apps it points you to Krisp's own pricing. The filter is part of Discord's voice engine. Zoom, Google Meet, Telegram, FaceTime and OBS never see it. Each of them gets your raw microphone and applies its own processing, or none at all.

For someone who only ever talks on Discord, that is fine. For someone who games on Discord, works on Zoom and records clips in OBS, it means three separate setups, each with its own idea of what noise is and what your voice should sound like.

The pattern in that table is the real decision. Either you accept a different filter in every app, or you put one filter in front of all of them, at the system level.

When noise suppression is the wrong tool

Noise suppression only subtracts. It cannot add anything your mic did not capture. If the trouble is that you sound distant, thin, harsh or muffled, turning Krisp up does nothing for that, and in a quiet room it makes it slightly worse.

Three things decide how you sound on Discord before any filter touches the signal:

• Distance. A mic 15 cm from your mouth hears far more of you and far less of the room than one 60 cm away on the desk. This is the cheapest fix there is, and it helps every filter downstream.
• The mic itself. A MacBook's built-in mic, AirPods and a USB condenser on a stand each capture a voice differently. A filter cannot invent the low end a laptop mic never picked up.
• The channel's bitrate. Server admins set bitrate per voice channel. Discord lists up to 96 kbps for an unboosted server and caps of 128, 256 and 384 kbps at boost levels 1, 2 and 3. If the channel is set low, everyone loses detail, whatever their noise settings.

If background noise is what you are fighting in general, beyond Discord, how to stop your mic picking up background noise goes through the room and placement fixes in more depth, and most of them cost nothing.

Where TunedMic fits, and where it does not

TunedMic is our app, so take this section knowing who wrote it. It is a Mac app that adds a virtual microphone called TunedMic. Your real mic stays as it is; TunedMic takes its sound, processes it on the Mac in real time, and any app that lets you choose a microphone can pick it, Discord included. You select it once under Voice & Video > Input Device, and the same processed voice goes to Zoom, Telegram, OBS and the rest when you pick it there.

It solves the "only in one app" problem from the table above, and part of the "noise suppression is the wrong tool" problem. Setup is a one-minute Sound Check: you read a short passage aloud and it takes more than 30 measurements of your voice, your mic and your room. From those it builds nine profiles in three families (Narrator, Creator, Vocal), and switching profile changes the sound in every app at once. There are optional manual controls for noise, room echo, clarity, loudness and a 12-band equaliser. It adds less than a tenth of a second of delay, and it runs locally; the voice is never uploaded.

What it is not:

• Not a Windows app. It needs a Mac with Apple silicon (M1 or newer) and macOS 14 or later. On Windows with an RTX card, NVIDIA Broadcast is the system-wide option; otherwise, Krisp inside Discord is the free answer.
• Not a promise of silence. It reduces noise; it does not remove all of it, and a leaf blower outside the window will still find a way in.
• Not refundable. There are no refunds, so use the free 3-day trial to check it on your own mic in a real Discord call. After that it costs $39 once at the launch price, with a license for two Macs.

If you use it with Discord, start with Discord's Noise Suppression set to None, so two filters are not stacking their guesses on top of each other. Run the Mic Test. If a particular noise still gets through, try Krisp on top and compare.

Three setups to copy

Pick the one that matches your room and copy the values.

A. Laptop or headset mic, noisy room, Discord only
   Noise Suppression ........ Krisp
   Echo Cancellation ........ On (Off if wearing closed headphones)
   Automatic Gain Control ... On
   Input Mode ............... Voice Activity, manual sensitivity
   If Krisp keeps switching off: close heavy apps, else Standard

B. USB mic close to your mouth, quiet room
   Noise Suppression ........ None (Standard if a fan is audible)
   Echo Cancellation ........ Off with headphones
   Automatic Gain Control ... Off, set Input Volume by hand
   Input Sensitivity ........ Just above your room's noise floor

C. Mac, same voice in Discord, Zoom, Telegram and OBS
   System ................... TunedMic as the input in every app
   Discord Noise Suppression  None to start, Krisp only if needed
   Discord AGC .............. Off
   Check .................... Mic Test > Let's Check, with the noise on

Your next step

Open Discord, go to User Settings > Voice & Video, and press Let's Check. Switch on the thing that bothers your friends, whether a fan, the keyboard or the washing machine, and say the same sentence three times: once with Krisp, once with Standard, once with None. Keep whichever setting leaves your consonants intact and the noise gone.

If one of those three already works and you only talk on Discord, you are done, and it cost nothing. If you also need that sound in Zoom, Telegram or OBS on a Mac, listen to the before and after recordings on our home page, made with a MacBook's built-in mic, a cheap wired headset and a Hollyland Lark M2 (start with the Lark take that has a Dyson hair dryer running about a meter away), and decide from your own ears whether TunedMic is worth $39 to you.