Remove Clicks and Scratches
Audacity offers a couple of fast ways to clean up a scratchy recording of a vinyl LP. Digital recordings can also pick up clicks from various sources. The first of these is Click Removal: It’s not as reliable as manually correcting scratches, but it’s fast and pretty good.
Click Removal
The Click Removal effect (Figure 12-4) looks for spikes in the waveform that are typical of pops caused by scratches, deletes the scratch, and then does a bit of interpolation to reconstruct the waveform. The Select Threshold setting determines the sensitivity for deciding when a spike is a scratch; it uses an algorithm that compares the audio on both sides of the spike to figure out what part is the scratch and what part is the good audio. ...
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