Jerry Avins wrote:

...

> If the taps are designated -i to +i with i=0 in the middle, then the
> even tap coefficients are zero, and the odd coefficients are
> proportional to 1/i (including the sign of i) before the window is
> applied. There's a neat formula for the scale factor that I forget, but
> it's easily computed from the gain of a signal at Fs/4.

...

Obviously, I ran out of coffee there. Change that to
.... taps are designated i=-k to i=+k with i=0 in the middle ...
N is the (odd) length of the delay line and k = (N+1)/2.

Note that the end coefficients are zero if k is even and the window will
make them zero if k is odd, so there are only N taps needed in the delay
line, as Al said.

Jerry
--
Engineering is the art of making what you want from things you can get.
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