[sc-users] fft again

[Jesper Elén <j.elen@xxxxxxxxx>]

Concerning my earlier question about subtraction of spectras,
there is the input and output windows that will be multiplied
with the signal in the IFFT.
is there any way of calculating the numbers so that it will resemble
a subtraction instead.
ex: source [1, 1, 0.5, 1]
    filter [0.4, 0.2, 0.2, 0.7]
the result should be [0.6, 0.8, 0.3, 0.3]
so I want the filter converted to numbers so that multiplication
will result in the subtraction