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RESAMPLE /FFT

        RESAMPLE /FFT

    The resampling is done in the delay domain  and  the  data  are  Fourier
    transformed.   The  Fourier transform is divided by the transform of the
    input channel shape, then extrapolated by zeroes  (if  interpolation  in
    the  frequency  domain  is required), multiplied by the transform of the
    desired channel shape, and finally transformed back to frequency domain.
    The  output  channel separation usually needs to be slightly rounded (to
    enable use of the FFT, the input spectrum must contain a round number of
    output channels).


Gildas manager 2018-02-21