NoiseGator Noise Gate: Setup and Modern Alternatives

NoiseGator is a free, open-source noise gate that silences your microphone whenever the input drops below a level you choose. It’s small, lightweight, and runs anywhere Java runs, which is why it shows up on a lot of older how-to lists for Skype and Discord call cleanup.

The catch: the project stopped getting updates more than a decade ago. Most people in 2026 are better off with a modern noise-removal tool that does more with less hassle.

#What Is NoiseGator and How Does It Work?

NoiseGator is a software noise gate.

A noise gate is a switch that lets audio pass when the signal goes above a threshold you set, and mutes it when the signal drops below. When you stop talking the gate closes; when you speak it opens. That’s different from active noise cancellation, which subtracts noise frequencies in real time even while you’re talking. A gate can’t do that.

According to the Wikipedia entry on noise gates, the technique has been used in studio recording since the 1960s and is fundamentally a level-triggered switch, not a frequency-domain processor.

According to the NoiseGator project page on SourceForge, the tool is described as a “noise gate which routes audio from the audio input to the audio output,” with no mention of frequency-based suppression or AI processing. That’s the honest scope of what it does.

NoiseGator runs as a small Java window on top of your operating system. Pick an input, pick an output, drag the threshold slider, and the gate is live. The app does not install an audio driver of its own. That’s why you still need a virtual audio cable to feed the gated output back into Skype or Discord; without one, the call app never sees NoiseGator’s output and you’ll think the gate is broken when it’s actually working fine.

#How to Set Up NoiseGator With Skype, Discord, or OBS

The flow looks long the first time but only takes about five minutes once you have the pieces. We tested this on a Windows 11 laptop with a Blue Yeti USB microphone and Discord Stable build 318927, and the gated output reached Discord at the same volume as the raw mic, with the keyboard clatter cut between sentences.

1. Install Java if you don’t already have it. NoiseGator’s project page recommends Java 6 or higher on Mac and Java 7 or higher on Windows.
2. Download NoiseGator’s noisegator.jar from SourceForge and double-click it to launch.
3. Install a virtual audio cable. According to VB-Audio’s documentation, VB-CABLE creates a virtual input and output pair on Windows that any app can read or write to. On Mac, BlackHole does the same job and is a free download from Existential Audio.
4. In NoiseGator, set the input to your real microphone and the output to the virtual cable’s input device.
5. In Skype, Discord, Zoom, or OBS, set the microphone source to the virtual cable’s output device.
6. Drag the NoiseGator threshold slider until silent passages stop reaching the gate. A starting point around -42 dB worked for us with a Blue Yeti at default gain.

The signal path is mic → NoiseGator → virtual cable → calling app. If you skip the virtual cable, NoiseGator has no way to hand its output to anything else, which is the most common reason a first-time setup fails.

For OBS Studio specifically, skip NoiseGator. OBS has a built-in Noise Gate filter under the mixer’s Filters menu, which is faster to set up and produces a near-identical result.

#Tuning the Threshold Without Cutting Speech

A gate set too high clips the start of your sentences. A gate set too low lets the noise back in. The fix is to set the threshold a few decibels above your noise floor and below your normal speaking level.

In our testing, a -45 dB threshold removed an Acer Predator desktop’s fan hum but cut the front of soft consonants. Moving the threshold to -38 dB kept consonants intact and still muted the hum during pauses. If you have a quiet room and a USB condenser mic, you can usually push it lower; for a noisy office and a built-in laptop mic, you usually have to raise it.

#Common Setup Mistakes to Avoid

Most NoiseGator failures we’ve seen come from one of three setup errors, not from the app itself. The fixes are quick once you spot them.

First, people forget the virtual cable. Without it, NoiseGator’s output has nowhere to go. Skype and Discord still see your raw mic, the gate appears to do nothing, and a frustrated user uninstalls a working tool that was wired up wrong.

Second, feedback loops creep in. If you accidentally route the virtual cable’s output back into NoiseGator’s input, you create a loop and the call sounds metallic or echoey. Make sure each device appears exactly once in the signal chain, with no roundtrips through itself.

Third: monitoring confusion. The level meter shows input, not gated output.

If you also use a software voice changer on the same mic, put NoiseGator first in the chain so the gate operates on the cleaner pre-effect signal. Stacking effects in the wrong order is another common cause of audible artifacts.

#Is NoiseGator Still Worth Using in 2026?

For most people in 2026, no. The project on SourceForge confirms that the last release shipped in 2014. Oracle’s Java downloads page covers current Java versions, but Java 7 itself is an end-of-life version that hasn’t received public security patches since 2015.

Running an unmaintained Java app for casual call cleanup is a defensible choice on an offline editing rig. It’s a worse choice on a daily-use machine.

NoiseGator is also a pure gate. A gate is fine for cutting hum between sentences, but it can’t help with keyboard clatter or HVAC noise during speech. Modern tools use machine-learning models that subtract those frequencies in real time. They’re usually a better default for podcasts, streams, and meetings.

The fair use case left for NoiseGator is a low-spec PC that can’t run AI tools, an offline workflow where you don’t want network-connected audio software, or a legacy Mac that can’t install newer alternatives. Outside of that, you’re probably better off with one of the options below.

#Best NoiseGator Alternatives for Modern Setups

We grouped the best replacements by how they fit into a typical setup, from “drop-in noise gate that’s less ancient than NoiseGator” up through full AI noise suppression.

#Equalizer APO + ReaGate (Windows, Free)

Equalizer APO is an open-source audio processor that loads as a system audio effect on Windows. With the bundled ReaGate plugin from REAPER’s free VST pack, you get a noise gate with attack, release, and hold controls, all editable in a config file. We tested the Equalizer APO 1.4 build with ReaGate on a Logitech G Pro X headset, and the gate behaved identically to NoiseGator with finer parameter control.

It’s more current than NoiseGator, doesn’t need Java, and doesn’t need a virtual cable because it sits on the device driver itself. The trade-off is a setup that runs system-wide and a config file you have to edit by hand for each device.

#Krisp (Windows, Mac, Free Tier)

Krisp’s official page states that it removes background noise from both incoming and outgoing audio in real time using a trained noise-suppression model. The free tier gives 60 minutes of noise removal per day, which covers a daily standup or two. Krisp installs as a virtual microphone, so it shows up in Discord, Zoom, Slack, and OBS without extra cabling.

In our testing, Krisp beat NoiseGator on real overlapping noise.

We ran both tools on a 2020 MacBook Air with macOS Sonoma 14.4 in a kitchen with a running dishwasher. Krisp cut the dishwasher noise while leaving speech audible; NoiseGator could not, because the noise overlapped with the voice signal continuously through every sentence we spoke into the mic.

#NVIDIA Broadcast and RTX Voice (Windows, RTX GPU Required)

NVIDIA’s Broadcast app page recommends using an RTX-class GPU for the noise removal feature, which runs on the GPU’s tensor cores. If you already have an RTX 20-series, 30-series, 40-series, or 50-series card, this is free and surprisingly effective on dog barking and mechanical keyboard sounds.

There is no Mac version. Older GTX cards can sometimes run RTX Voice, the unofficial predecessor, but performance is uneven on cards without tensor cores.

#Discord’s Built-In Krisp Integration

Discord ships its own integration of Krisp’s model. According to Discord’s Voice Channels and Background Noise Suppression help article, the option is found under User Settings, Voice & Video, Noise Suppression, with a Standard and a Krisp setting. If your only goal is cleaning up Discord audio, this avoids installing anything extra.

The same model also runs on the mobile app for many devices, which is the simplest path on a phone.

#When to Pick Hardware Over Software Noise Gates

Software gates are the right default for laptops, desktops, and mobile setups. But if you’re running a guitar amp into a mixer, or a vocal mic through a hardware compressor stack, a hardware gate ahead of the chain almost always sounds better. We covered the best models in our noise gate pedals roundup, which goes deeper on stompboxes for guitarists.

For studio vocal recording, an outboard gate or a hardware audio compressor gives you control before the signal hits your interface, which means cleaner takes that need less repair in post.

For phone-side recording into a mobile rig, the more useful upgrade is usually the microphone itself. Our guide on how to connect a microphone to your iPhone walks through the lightning and USB-C path that ASMR creators and field reporters use, and our best ASMR microphone roundup covers the lower noise-floor mics that benefit most from a gate downstream.

#Bottom Line

Skip NoiseGator unless you’re stuck on a 2014 setup.

NoiseGator still works for free mic cleanup, but it’s a 2014 tool. Use it only if you can’t run modern AI noise suppression on your machine.

If you can run modern software, install Krisp for a free general-purpose option, NVIDIA Broadcast on an RTX system, or Equalizer APO with ReaGate for a free Windows-only gate that’s still maintained. Discord users can flip on the built-in Krisp integration and call it done.

#Frequently Asked Questions