Removal of an unwanted regular sound

Special Interest Groups Audio Processing
1

Hi guys,

I am trying to remove a repeating noise, like a metronome or similar, from a recording (which was apparently accidentally introduced in post-production and not noticed). I have a basic understanding of Audacity, and have tried ‘Noise Reduction’ but it didn’t seem to have any success. The noise in question sounds a little like the default Windows mouseclick, and occurs every ~10 seconds. Is there an effective way to remove this using Audacity?

The zoomed-in waveform is here:
http://i.imgur.com/C4cqy.jpg

As you can see, it’s on one stereo channel far more than the other but is present on both.

2

It probably won’t be possible to completely eliminate it, but probably will be possible to reduce it substantially (though it may require a tedious amount of work to do so). Could you attach a short audio sample in WAV of FLAC format to your reply - just a couple of seconds - then we can try to help you find the best way to tackle the problem.