Listen to the ENTIRE recording and check for distortion in the voice. You'll then be taken back to the wave form view (you'll notice that the recording looks much cleaner, in the sense the jagged waveforms in the gaps have given way to flat lines). When you're satisfied that the noise has been removed without distorting the voice hit the "Remove Noise" button. (If there's noise AND distortion have your sound card and microphone checked by your hardware guy). If there's distortion of the voice move the slider to the left. If there's still noise (99.99% of the time there won't be) move the slider to the right. Next, hit the "Preview" button in the dialog box: Move the slider to the left so it's positioned about halfway between the start and its current position:
Your recording should look a bit like this: Hit Ctrl+A (keeping the Ctrl key pressed, hit A) to select the entire recording. You'll be taken back to the wave form of your recording.
This tells Audacity that what was selected is noise that you want removed from the recording. Select that and you'll get the following dialog box:Ĭlick the "Get Noise Profile" button. This is a sample of the noise or hiss that you want Audacity to remove. Open a pre-recorded file or record your piece.Ĭlick-drag a "gap" (part where there was nothing being said - the beginning of a recording usually has a gap) to select it: Here's how to remove hiss (noise) from a recording: If you use Audacity to remove noise you'll have no hiss throughout the recording. Not so with Audacity's Noise Removal tool. Noise gates remove the hiss from the gaps but the hiss will still be audible in the spoken parts. That hiss will be audible even "below" the spoken parts of the recording (you'll hear the hiss when you're saying something too). Let's say there's a constant hiss in a recording. The end result is noise removal not only from "gaps" (the parts where the recording is supposed to be silent, like spaces between sentences and paragraphs) but also from spoken parts. I won't launch into how the techniques differ but I shall say this, Audacity's tool is far superior to any other I've tried. While most other software packages use a noise gate to remove unwanted noise, Audacity goes about it differently. I've tried various tools to remove hiss (or noise) from home recordings and I think Audacity has the best noise removal tool of all. For the updated tutorial for the changed Audacity, go here. This tutorial is for an older version of Audacity.
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