Use just enough to remove any background hum or noise that may be coming into OBS. You do not want to use too much noise suppression or you will distort the audio. Start with a Noise Suppression or Expander to remove any unwanted noise from the background of your audio. When you are adding audio filters, it’s highly recommended to use headphones so that you can clearly hear the adjustments you are making. OBS offers two unique noise suppression options. Most audio experts will recommend that you start with the following audio chain order. VST Plugins – Support for VST 1 and 2 plugins is available in the core installation of OBS.You can adjust the noise suppression to remove background noise but keep in mind that the filter will affect the overall sound of the source as well. Noise Suppression – This filter is effective at removing low-level noise from computer fans and other electronic devices.You can set a level of noise on your audio input that you want to be automatically muted.

Noise Gate – The noise gate is a simplified version of the expander.

Limiters are used to limit audio from peaking above 0dB.

Limiter – Limiters are a specialized type of compressor that is designed to be used at the end of an audio processing chain.

Invert Polarity – Only used to help with phase cancellation issues which is an audio phenomenon that reduces the audio’s overall strength.

If possible, the gain should be adjusted before it is captured into OBS to avoid unwanted noise.

Gain – Gain can be used to increase the volume of a source.

Therefore, the expander has similar features such as a Threshold, Attack, and Release. The expander works similar to a compressor but on low-level noise.

Expander – An expander can be used to remove unwanted background noise by setting a low-level threshold for audio that you want to be removed.

For example, you can apply a sidechain compressor to a background music track to automatically reduce volume when you are speaking through a microphone.

Sidechain Compression (aka Ducking) – Sidechain compression can be used to automatically adjust the volume of an audio source to make room in the audio mix for another audio source such as a microphone input.

An Output Gain can be used to increase the overall volume after the compression effect. The Attack and Release settings allow you to adjust how quickly the compressor effect will ramp in and out when the Threshold is reached.

The Compressor includes a Threshold setting you can use to set the audio level at which the compressor should start working. The main compressor adjustment is called Ratio and the higher the ratio the more compression will be used to reduce the loudness of audio when peaking. Compressors allow you to limit audio peaking beyond 0dB by making loud noises quieter when they peak.

Compressor – The compressor can be used to make any audio source sound more full.Here is a list of default OBS audio filters This is because the order in which you use each filter will affect the sound that you get in the end. When you are working with audio filters it’s important to remember that audio device filters can be used in a chain. Audio filters are designed to enhance audio inputs in OBS.

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