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last update: 3rd March 2007

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Spectral Replacement

Sections of damage which are too long to be repaired by interpolation can sometimes be effectively dealt with by substituting a new section of waveform constructed from an analysis of the portions of waveform before and after the section. This is known as "spectral replacement", and can work well for sections up to a few thousand samples long.

Spectral Replacement works by performing a Fast Fourier Transform on the sections of waveform immediately before and after the damaged section, and building a replacement section from the average of those two sections.

Example Screen Shots