To increase your audio quality & get that desired sound, you may need to fiddle with the OBS audio filters. We have compiled an easy to follow how-to guide, showcasing an introduction and overview of OBS audio filters. Make sure to view our companion video guide for more in depth coverage of these filters.
Adding the filters into OBS is quite easy. Commonly, you can drop down to the Audio Mixer in OBS, click on the gear icon, select the filters option; use your eyeballs to locate the + sign for a dropdown list of filters to add. Note: filters are sometimes called plugins as well. Check out our companion video for even more ways to add filters, that take you to the same menu.
Keep in mind that your filters will be processed in order from top to bottom of your list. You can test out unique orders to see which one best suits you.
Filters: The gain filter allows you to alter the dB intensity (pretty much, volume) of a specific audio source. Now, there is a difference between gain & volume. Gain is related to the input signal of an audio source & volume is related to the output source. The most commonly used reason for the gain filter is to increase the volume of your input source (mic) coming through.
The compressor: The compressor filter is an industry favorite. Basically, its an automatic volume adjuster. This filter is a great way to control any loud peaks in your audio & keep it more evened out.
The limiter: The limiter is a filter that all content creators should be using. It’s a more intense compressor. It prevents the audio from ever exceeding a threshold. This filter really helps in the elimination of output clipping.
Expander Filters: Expander filters were recently added. You can consider an expander a reverse compressor. An expander takes the quietest parts of your audio & brings it down even more. This is great for podcast environments, where many people are talking. It allows for better isolation of a specific voice & easier noise reduction.
A noise gate: A noise gate can be considered a reverse limiter. Its your golden ticket for filtering out background noise (i.e. keyboard clicks). You will be using an open & closed threshold. The open threshold is the point that will allow your audio to go through. The close threshold is when the gate will close off all audio. Make sure your close is lower than your open
Noise Suppression: Noise suppression looks for frequencies based on where you set the threshold. It removes sounds based on the frequency content of the audio source, across the entire source. If you are in an environment with heavy background noise, this can be counterproductive & degrade your entire source. Be careful with this one.
And then.... Invert polarity takes the high- & low-pressure waves & flips them 180 degrees. This filter isn’t commonly used, & best used if you are, for example, using multiple microphones.
VST 2.X allows you to add 3rd party plugins to use in OBS.