It’s always best to mitigate noise in your audio recordings before it can be picked up by a microphone. Unfortunately, this doesn’t always happen and it’s necessary to soften up that signal noise in post production. Most modern DAW’s (digital audio workstations, AKA audio production programs) use plugins to help with this process. And some DAW’s make finding those plugins a bit of a challenge. That’s why I’ve decided to post a quick tutorial on how to do noise reduction with the ReaFir plugin for Reaper.

Most unwanted noise in audio recordings tends to be constant throughout the length of the piece. Usually, these artifacts come from something in the environment such as a cooling fan or an electrical issue between the microphone and the sound input. When you have this type of continuous noise in a recording, noise-reduction plugins can come in handy as you’ll usually only need to set them once, and then they’ll apply the noise reduction to the entire track or noisy section.
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