A source can still exceed 0dB with a compressor if your input level is too loud, your ratio/threshold are set incorrectly or you apply too much output gain.
Sidechain/Ducking Source: When a compressor is placed on an output audio source such as your Desktop, Sidechain can use the input from a microphone/aux source to reduce the volume of the output source. Applying Output gain brings the average level of the source back up which can help improve its presence over-top of other audio sources. Output Gain: When you compress a signal it typically ends up quieter which reduces your average level. Release: How quickly, in milliseconds, you want the compressor to return to zero gain reduction after levels drop below the threshold. #Gain reduction free download full
Attack: How quickly, in milliseconds, you want the compressor to reach full gain reduction when levels exceed the threshold. When levels are below the threshold the ratio is 1:1 which translates to no gain reduction. Threshold: Once the signal reaches this level the compressor will begin to apply compression at the set ratio. For example, 2:1 will be a weak compression (this translates to an audio level 6dB above the threshold will be 3dB above after the compression), while 6:1 will be a much stronger compression. Ratio: The amount of compression or gain reduction to apply to a signal that is above the threshold. In short, a compressor makes loud sounds quieter and typically would be placed at or near the beginning of your filter chain. It will automatically lower the source's volume to reduce the likelihood of it peaking above 0dB, which can cause clipping and distortion, and then turn it back up once the volume is back to normal. The sharpen filter should explain itself as well, if you feel your webcam input for example is a bit blurred and you want to improve the overall sharpness a bit, add the filter and test with different values.Ī compressor is very useful if your source (typically a microphone) is set for a normal level but can sometimes spike much louder, such as impromptu shouting or getting into a heated discussion. This filter allows you to apply a LUT to your video sources. They behave slightly differently, so you will need to experiment and see which works best for your personal use case. This can be used for green screens and similar stuff. Negative and positive values will change the direction in which your source will scroll and you can limit the height and width if necessary.īoth the Color Key and Chroma Key filter can be used to remove a certain color of your source and make it transparent. The scroll filter gives us the ability to give our text for example a scrolling effect, left-to-right and top-to-bottom. You can change the contrast, brightness and gamma of your source and even provide a color overlay. The crop filter should explain itself but in short it lets you cut off the top/left/right/bottom of your source/scene to only show the parts you want.Īgain, the name says it all. This can be used to give your webcam a round border for example: The Image Mask/Blend filter gives us the option to use the Color or Alpha Channel of an Image as a Mask or to Blend an Image (multiply, addition, subtraction) over your Scene or Source. But let me explain what the different filters allow you to do. You can add them by right-click your desired Scene, Source or Device and selecting "Filters" (for Audio Devices, click on the gear icon next to your device). The following filters are available in OBS Studio 23.0.0: In OBS Studio we have the ability to add filters to our Sources, Scenes and even our Audio Devices.
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