Removing unwanted Noises from Audio Samples Creative use of Cool 2000`s Noise Reduction feature |
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The Noise Reduction of Cool edit is normally used to remove noises of a continous nature. Here is what the online help says:
But Cool 2000 has also the power to reduce very effectively noises
that are not continous at all from certain signals. Normally the signal
is varying while the background noise is constant. |
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This
example shows the tone of a Harp that I sampled last Summer.This very
Sample is now part of the Early Patches Akai release. I had visited the
owner of the harp to record the instrument in her own home. |
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You
could of course hear the bird. But its sound is not visible in the
Waveform view.
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Now
how can we get rid of that little tune? I have used the noise
reduction feature to do the trick. Normally it is intended to remove noise
but this time I will utilize it to keep the signal. |
After having selected the signalprint I opened the noise reduction dialog (/Transform menu) and took a profile from the selection. This Noise reduction functionality is available to all users of Cool 2000 (and of Cool 96 that I used at the time) even if You do not have the optional noise reduction plugin that offers even more sophisticated features. |
Please note that it is very important to use high settings for Precision Factor and FFT Size. Otherwise there will be a noticable click between the processed and the unprocessed portion of the sample. |
After
taking the signal print close the dialog. Donīt use the cancel button.
This would erase the signal print. Hit the OK button. And thatīs it. |
Here is the result. Part of the patches are still visible - but only when You know exactly where to look for it. Now listen to the outcome An unprepared listener will not be aware that there has been any disturbance at all. |
Đ Andreas Sumerauer 1999 Comments? mailto:ansum@online.de |