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November 15, 2006 - 7:05pm
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There Lies the whoosh of the vacuum cleaner.
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To remove unwanted sounds in a recording I use Sonic Foundry's (now Sony) noise reduction plug-in. It analyzes the noise spectrum and attempts to remove just this sound.
I find that listening to the residual noise (that is, just the sound that is being removed from the recording) tremendously helpful in setting the parameters of the plug-in.
Unless there is a distracting noise throughout the entire recording (such as a horribly noisy fan or other noise that could not be turned off in the venue) I process as little of the file as possible.
I think it does come down to subjective evaluation once one has the tools to do the job. It can be very frustrating at times.