Use Free Software To Clean Up Noisy Audio Files

Use Free Software To Clean Up Noisy Audio Files

Audacity is a great tool for simple audio editing. If you’ve only ever used it to trim recordings, now’s the time to take the next step into actual signal cleanup. Here’s how to remove noise from any MP3 or any recording.

Yatri Trivedi takes us step by step through removing background noise from a recording you’ve made or a file you’ve picked up. It starts with finding a quiet moment where the noise is still present, so you can get a baseline on what Audacity should remove from the rest of the track. If, like me, you’ve found that your USB headset or laptop microphone always carries with it a little hiss and click, this could save you a lot of second takes and frustration.

The How-To Geek Guide to Audio Editing: Basic Noise Removal [How-To Geek]


  • Audacity has a special GUI mode called CleanSpeech (Edit > Preferences > Interface > Modes: CleanSpeech Mode).

    In particular, the Limiter plugin (by the CleanSpeech author), automatically silences audio below a configurable threshold. CleanSpeech shows only the effects that are related to cleaning up audio (Noise Removal, Limiter, Normalize, Truncate Silence), making it easier to experiment with things.

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