How can I remove the peaks in the top channel shown in the image? They are noises. This image is from audacity


  • Which Operating System? Which software are you using? Apr 28, 2011 at 17:08
  • @techie007: edited the question
    – Siva
    Apr 28, 2011 at 17:10

3 Answers 3


Have you tried Audacity's Noise Removal feature(s)?

This may be more of a 'click' than a 'noise' (looks like it), so perhaps you'll have better luck with the Audacity "Click Removal" features?

Example of what's on the page:

Sometimes an even better result can be obtained by zooming in (CTRL + 1) to near sample level and either silencing the click (Edit > Silence), or using the Draw Tool to smooth out the contours of the samples and so attenuate the click.

  • no it is not providing desired result i tried in many ways
    – Siva
    Apr 28, 2011 at 17:27
  • is it possible to just cut the spikes in the top channel ?
    – Siva
    Apr 28, 2011 at 17:28
  • @Siva - I added the wiki page for the Click Removal suggestions/features. Apr 28, 2011 at 17:32
  • 1
    it is a huge file 10 hours, so will it be practical to use this feature first of all ?
    – Siva
    Apr 28, 2011 at 18:16

Truncating peaks like that can be done using the Limiter (Effect > Limiter).

You probably want to use a "Hard Limit", as only to affect the peaks. Also, you can of course use it multiple times in combination with Effect > Normalize to shrink those peaks while scaling up the remainder of the recording to cover the full volume range.


In case you haven't tried them yet, Effect > Leveller and Effect > Click Removal in Audacity might work here.

  • it is not working anyother options ?
    – Siva
    Apr 28, 2011 at 17:27
  • 2
    is it possible to just cut the spikes in the top channel ?
    – Siva
    Apr 28, 2011 at 17:31
  • 1
    Try it and find out. regards,
    – Xavierjazz
    Apr 28, 2011 at 18:44

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