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).