This section needs cleanup and updating. If you can do it, please go ahead!
CLEANING UP SOUNDFILES
Brian ?? wrote to point out some tools useful for cleaning up noisy soundfiles. Generally speaking, this will never produce results as good as starting with a clean soundfile, but sometimes you have no choice.
denoi and dnr may be found at: http://www.sci.fi/~mjkoskin/. Says Brian, "These routines ... take a sample of noise from the beginning of the recording and filter it out from the rest of the recording." I've found them both useful, though it takes some playing with parameters. Also of interest is gramofile, available at cardit.et.tudelft.nl/~card06/. Brian writes that "Gramofile is a program to remove clicks and pops from LP recordings. It can handle huge files and split them up into separate tracks. It doesn't do denoising, but it does have some other filters."
csound apparently now comes with a denoising utility, I haven't tried it yet. --SlinkP
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