Noise Suppression in OBS: Reduce Background Noise Without Losing Voice Clarity

A recording captures a steady computer hum that you barely notice while talking. Noise suppression can help, but do not start with the strongest setting: processing may alter speech along with the background. Adjust the filter by comparing recordings, not by judging one quiet pause.

First identify the actual problem. Record a few seconds of silence and a normal sentence without extra processing. If you hear a particular source, such as a fan near the microphone, try changing the equipment’s position and record again.

What the filter can do

OBS documentation describes Noise Suppression as a filter for mild background or white noise; a very noisy room remains challenging. RNNoise is described as a higher-quality method with greater CPU use. Speex lets you adjust suppression manually; excessive processing may distort your voice.

If you choose RNNoise, do not look for the Speex level slider. Suppression Level applies specifically to Speex: zero disables suppression, while more negative values increase it. The default is not a universal recommendation for every microphone.

Add the filter

Find your microphone in the OBS mixer and open its Filters menu. Press the plus button in the audio-filter list, select Noise Suppression, and give it a clear name. Choose the method; the visibility icon in the filter list toggles it on or off. Menu names depend on the interface language.

Apply the filter to the microphone actually used in the recording. If there are several similar sources, first check which meter responds to your speech. Do not randomly apply identical processing to every device.

Compare two identical segments

A practical test uses the same short sequence with the filter disabled and enabled:

• A few seconds of silence without moving the microphone.
• A normal sentence: “I’m checking my voice during a calm conversation.”
• A quieter sentence and a word with a brief initial sound, such as “start.”
• Typing on the keyboard while speaking.

Keep microphone position and volume the same. Listen to both recordings: are word beginnings intact, is there a metallic sound, and did the unwanted background actually decrease? If speech suffers, return to the previous setup. With Speex, try weakening suppression by a small step and repeat the whole sequence.

Separate noise from volume balance

If your voice disappears only during loud gameplay, compare it with game audio in the combined recording. Noise suppression does not choose a comfortable source balance for you. A practical first step is to lower the game in the mixer and listen to the same segment again, keeping microphone settings unchanged.

Change one parameter at a time and briefly note the result: “Less background noise, but worse word beginnings.” Once you find an acceptable setup, test it under normal gameplay load. The goal is an intelligible voice in an actual stream, not complete silence at any cost.