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Can you please post the link to the filter plugin and to the 3dFFT dll again? The current FTP address requires a password authentification :-/
The principle sounds good to me, at least in music restoration FFT filtering is the only proper way to do the job - and the same method should give superior results, although finding the right FFT filter parameters is mostly a painstakingly time-consuming job, and the results of a slight overprocessing are received as "very artificial" by the human eye, so conservative settings are a must.
Bernard (having done a lot of FFT filtering on "pictures" of particle physics detectors, but with hardware DSP solutions of the first generation in 1994)
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