On Oct 9, 5:21=A0pm, "sauwen" <sauwen...@[EMAIL PROTECTED]
> wrote:
> Hi all. =A0Does anyone know how to change the width of a feedback comb
> filter's teeth? From the general idea on wikipedia, it seems like it is
> only possible to change the delays and the gain.
when you have a feedback comb filter (or even a feed-forward comb
filter), try to imagine replacing the delay element, z^-N, with a
quantitatively different delay element, z^-1. then with that
feedback, you have a simple LPF where, depending on the feedback gain,
you can get an idea of how wide this single tooth is. now replace
z^-1 with z^-N and you will see that your tooth is scrunched by a
factor of 1/N and there are N of these teeth from -Nyquist to just
under +Nyquist.
does that help you figger it out?
r b-j
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