Do You Need a Noise Gate to Stream on Twitch? The Honest Answer

By Paul d'Anjou, Twitch growth expert June 2, 2026

TLDR

• A noise gate only works when your background noise is constant and quieter than your voice (PC fan, AC hum, fridge).
• If your mic is too sensitive, the RNNoise suppression filter built into OBS often fixes the problem better than a gate.
• A badly-tuned gate clips word endings and makes your stream sound amateur from the first minute on.

Verdict: yes for constant quiet noise, no for everything else

If you are weighing whether to slap a noise gate on your Twitch stream, the honest call comes down to two questions. Is your background noise both constant (PC fan, AC, fridge hum) and quieter than your speaking voice? Yes to both, gate is the right tool. No to either, walk away and look at RNNoise or a better microphone instead.

The Reddit elephant in the room is the r/Twitch thread titled "Don't use a noise gate", which most tutorials politely ignore. Its core argument is solid: a gate filters nothing while you speak, it only enforces silence between sentences. Mechanical keyboard hitting at -25 dB while your voice runs at -15 dB? The gate lets it through. Roommate yelling at 65 dB behind you? The gate lets it through. The gate only catches what sits under the threshold, which is a narrow slice of real-world stream noise. This article walks through exactly when to activate, the dB settings nobody else gives, the three alternatives most tutorials skip, and how to test in 2 minutes before going live.

What a Noise Gate Actually Does

The one-sentence definition

A noise gate is an automatic door on your microphone signal that opens when the incoming volume crosses a threshold you set, and closes when the volume drops back below it. While the door is closed, viewers hear absolute silence from that source. While it is open, everything passes through unchanged, including sounds you may have wanted to block.

Noise gate vs noise suppression (RNNoise, Krisp, Nvidia Broadcast)

This is the distinction that resolves 80% of beginner confusion. Noise suppression (RNNoise, Krisp, Nvidia Broadcast) runs continuously, even while you speak. It isolates voice from noise and reduces the noise in real time. A noise gate does nothing while you speak, it only acts between sentences. Suppression works on the nature of the sound, gate works on its volume. A mechanical keyboard audible during your voice? Only suppression helps. A PC fan audible only between phrases? Gate alone is enough. Many streamers stack them: suppression first, gate second.

Noise gate vs compressor

A compressor reduces the loud peaks of your voice to make the overall level more uniform. It does not cut anything, it just attenuates loud bits and effectively brings up quiet bits. A gate is a binary on/off based on threshold. Beginners often confuse them in OBS because both sit in the same Filters menu, but they solve opposite problems: compressor smooths volume, gate enforces silence.

When a Noise Gate Genuinely Helps

Loud PC fans or AIO pump: yes

Textbook case. Your fan hums steadily at 30 dB ambient and your quiet voice hits 55 dB. A gate with close threshold at 33 dB and open threshold at 52 dB kills the hum between sentences completely, and during your voice the fan is masked by the much-louder speech anyway. Immediate gain, no side effects when thresholds are tuned correctly.

Mechanical keyboard: it depends on threshold tuning

Common trap. Cherry MX Blue switches register at 50-60 dB about 4 inches from a mic, which is the same range as a quiet speaking voice. A standard gate lets the keystrokes pass during your voice (they are above the threshold), and cuts them between sentences when the gate closes anyway. For mechanical keyboards, the real answer is to move the mic, isolate it acoustically, or switch to silent linear switches. A gate alone is not the solution.

Roommate or family in the background: no

A gate does not block loud sounds. If your roommate walks by talking at 65 dB behind you, the gate waves them through like butter, because their voice is above the threshold. The gate cannot tell your voice from anyone else's voice. For this case, only a dynamic mic pointed 2 to 4 inches from your mouth (strong off-axis rejection) or a treated room solves the problem.

Open-plan apartment or coliving: usually yes, in combo

If your problem mixes constant quiet noise (central HVAC, ventilation) with occasional loud spikes (door slams, conversation in the next room), the gate handles half (the constant quiet part), and only a dynamic mic or aggressive AI suppression catches the other half. Enable both gate and RNNoise, accept that the noisy roommate will still leak sometimes.

Untreated room with HVAC noise: yes with caveats

If you stream from a room where the HVAC pushes a steady 25-30 dB of broadband noise, a gate gives a clean silence between phrases that improves perceived audio dramatically. Caveat: pair with mic positioning and a thick rug under the desk to address the root cause too, because the gate cannot help while you actively speak.

When a Noise Gate Makes Things Worse

You whisper or speak softly during stream

ASMR Twitch, late-night calm voice at 40 dB ambient-level? The open threshold becomes impossible to tune. You either clip your own words or let the noise floor sneak in. Turn the gate off, lean on a good dynamic mic with close mic placement and on RNNoise instead.

Music streams, singing, instrument live

A gate cuts the tail of long notes, vibratos, and expressive breathing. For music on Twitch, always disable the gate on the mic track and the instrument track. Suppression alone is plenty, and even suppression should be tuned to a light setting to preserve nuance.

Intermittent loud noise (siren, dog, car)

A gate only blocks what sits below the threshold. An ambulance siren at 70 dB walks straight through. A dog barking does too. For these cases, forget the gate. Either use a manual push-to-mute key, accept the occasional leak, or physically isolate the room.

You could fix it by moving the mic 8 inches closer

The most effective reflex costs zero dollars. Moving your mic from 12 inches to 4 inches from your mouth cuts the relative noise floor by 10 to 15 dB without any plugin. Good positioning of a separate mic from the headset fixes more audio problems than three hours of OBS filter tuning. Before activating a gate, just bring the mic closer.

How to Configure a Noise Gate on OBS in 5 Minutes

Step 1: measure your ambient noise floor in dB

Open OBS, unmute the mic, then stay silent for 30 seconds. Watch the dB meter on the audio source. That is your noise floor, typically between -50 and -35 dB on a decent setup. Note the exact value, it anchors your close threshold.

Step 2: set close threshold (3 dB above noise floor)

Go to Filters, Noise Gate on your mic source. Place the close threshold 3 dB above your measured floor. Floor at -45 dB? Close threshold at -42 dB. The 3 dB margin keeps the gate from flickering on small ambient spikes.

Step 3: set open threshold (3 dB below quiet voice)

Speak normally, watch the meter at your quietest stream voice (say, calmly narrating a slow gameplay moment). It usually sits between -25 and -15 dB. Place the open threshold 3 dB below that. Quiet voice at -20 dB? Open threshold at -23 dB.

Step 4: tune attack/release (25 ms attack, 150 ms release)

Attack at 25 ms means the gate opens 25 ms after the threshold is crossed (short enough to not eat word starts). Release at 150 ms means the gate stays open 150 ms after the volume drops below close (long enough to not clip word endings or breath between phrases). These defaults work for 90% of voices. Increase release to 250 ms if you have a slow, deliberate speaking style.

Step 5: record a 2-minute local test before going live

Launch an OBS local recording for 2 minutes, simulate a real stream with speech and silence. Listen back on headphones. Verify word starts are not clipped ("hello" should not become "ello"), word endings close cleanly, no fan reappears between phrases. Clipped starts? Drop open threshold by 2 dB. Noise leaks? Raise close threshold by 2 dB. Iterate two or three times.

Alternatives Most Streamers Don't Know About

RNNoise (free, built into OBS as Noise Suppression)

The OBS Noise Suppression filter ships with two modes: Speex and RNNoise. RNNoise is a neural network trained on voice that separates speech from noise continuously, free, no external plugin needed. For 80% of beginners with a USB gaming mic, RNNoise alone solves the problem and makes the gate unnecessary. Enable it first, before touching the gate.

Krisp (paid, AI-based): when RNNoise isn't enough

Krisp is a subscription service (roughly $10-15 per month) offering more aggressive and cleaner AI suppression than RNNoise. Relevant if you stream from a genuinely loud environment (open office, café, train) where RNNoise leaves residual. For most at-home streamers, Krisp is overkill and the spend does not justify itself.

Nvidia Broadcast (free on RTX cards): strongest suppression on Windows

If you have an RTX GPU (20, 30, 40 series and up), Nvidia Broadcast is free and provides the most aggressive noise suppression available on Windows. It runs on Tensor Cores, so zero CPU impact. The aggressive "Mic Noise Removal" mode kills keyboards, fans, dogs, almost everything. The one catch: it can introduce a subtle metallic artifact on the voice at high gain.

Dynamic mic (Shure SM7B, Shure MV7, Behringer XM8500): hardware fix

A hardware solution that eliminates 80% of the need for software filters. Dynamic mics capture mostly what is close (2 to 6 inches) and strongly reject side and distant sounds. Behringer XM8500 is around $25, Shure MV7 around $250. More effective than any combination of plugins, provided you have a good streaming mic and aim it correctly.

Acoustic treatment (panels, rugs, curtains): the root cause fix

The least glamorous option, the most effective long term. A thick rug under the desk, a heavy curtain behind the mic, two or three acoustic panels on bare walls, and you knock 5 to 8 dB off the ambient noise floor without enabling any software. Investment $50 to $200, durable, and you also gain in overall voice quality (less room reverb on the sound the walls would bounce back).

When you then turn streams into clips for TikTok or YouTube Shorts, clean source audio matters even more than it does on stream. Tools like Snowball, the AI clipping tool I'm building to auto-cut Twitch VODs into TikTok and Shorts formats, can process the audio of delivered clips, but no post-processing rescues a signal drowned in noise at the source. Audio quality is won upstream in OBS, not in post-production.

A note on common pitfalls beyond the obvious

Three subtle mistakes most tutorials skip.

First, the noise floor drifts. Your fan in winter (heater on) and your fan in summer (cooling kicks in harder) run at different baselines. A gate tuned in November will leak in July. Re-measure twice a year, or whenever you notice the gate behaves differently.

Second, the filter order in OBS matters. Always place Noise Suppression above Noise Gate in the filter chain (suppression runs first, gate runs on the cleaned signal). The opposite order means the gate decides based on raw noisy input, then suppression runs on what gets through, which leads to threshold values that no longer match reality.

Third, listening on monitors vs headphones gives different verdicts. Tune your gate on the headphones you actually wear during stream, not on speakers. Sub-bass differences and room reflections make speaker-tuned thresholds wrong by 4 to 6 dB on headphones, which is enough to clip word starts.

Conclusion: a useful tool in maybe 30% of cases

A noise gate is neither the magic fix sold by quick tutorials nor the abomination some Reddit threads call it. It is a precise tool that solves a precise problem: constant quiet ambient noise audible only between your phrases. For everything else (keyboard during voice, loud roommate, dog), look at RNNoise, Nvidia Broadcast, or a dynamic mic.

If you want to try, measure your ambient floor, set close at +3 dB, open at -3 dB of your quiet voice, test 2 minutes locally, adjust. If you have no patience for tuning, just enable RNNoise in OBS and move on. For the bigger picture on audio gear, the article on do I need a good microphone for Twitch explains why 80% of the need for a gate disappears as soon as you switch to a well-placed dynamic mic.

FAQ

What noise gate do streamers use?+

Most streamers use the built-in OBS Noise Gate filter, often paired with the OBS Noise Suppression filter set to RNNoise. Few pay for a third-party plugin like Krisp because the free combo covers most rooms. Plenty of pros skip the gate entirely and rely on a dynamic microphone positioned 4 to 6 inches from the mouth, which kills 95% of the need before any filter even runs.

Do you need a noise gate to stream?+

Only when your background noise is both constant (PC fan, AC, fridge) and quieter than your voice. If either condition fails, a gate is the wrong tool. For an intermittent noise like a barking dog, the gate does nothing because the dog spikes above the threshold. For a keyboard that hits while you talk, a gate also does nothing. RNNoise or a better mic solves those cases.

Noise gate vs noise suppression: which one?+

They solve different problems and stack well. Noise suppression (RNNoise, Krisp, Nvidia Broadcast) filters continuously, even while you speak, by isolating voice from noise. A noise gate does nothing while you speak, it only enforces silence between sentences. Beginners often need suppression first to clean the signal during voice, then a gate second only if quiet constant noise still slips through between phrases.

Why do some streamers say not to use a noise gate?+

The popular r/Twitch thread "Don't use a noise gate" makes three valid points. A badly-tuned gate clips word starts and ends, which sounds amateur within the first minute. A gate cannot block any sound that exceeds the threshold, so it does nothing for keyboards, doors, or roommates. And most setups can fix the underlying issue with mic positioning or RNNoise before reaching for a gate. The thread is right when the gate is reached for as a default reflex.

How do I set up a noise gate on OBS for Twitch?+

Open OBS, go to your mic source, Filters, Noise Gate. Measure your noise floor by leaving the mic on without speaking, watch the dB meter. Set close threshold 3 dB above that floor (if floor is -45 dB, close at -42 dB). Set open threshold 3 dB below your quietest speaking voice (if quiet voice is -20 dB, open at -23 dB). Attack 25 ms, release 150 ms. Record a 2-minute local test, fine-tune.

Is RNNoise better than a noise gate?+

For most beginners, yes. RNNoise is a neural-network filter built into OBS as the Noise Suppression filter, and it cleans the signal continuously, even while you speak. A gate only silences between phrases. Start with RNNoise alone, which covers about 80% of typical home setups (USB gaming mic, slightly noisy PC). Add a gate only if quiet constant noise still leaks between sentences after RNNoise is dialed in.

Does a noise gate block keyboard noise during voice?+

No. A gate only acts when the input level drops below the close threshold, which happens between your phrases, not while you talk. A mechanical keyboard hitting at -25 dB during your voice at -15 dB is well above any usable threshold, so the gate lets it through as if it were not there. To handle keyboard clack during voice, use RNNoise or Nvidia Broadcast, switch to silent switches, or move the mic farther from the keyboard.