Re: Width of comb filter teeth

sauwen wrote:

> Hi all.  Does 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. 

http://en.wikipedia.org/wiki/Comb_filter
shows an unnormalized comb 
filter. Put a multiplier in series to keep the peaks at unit gain and 
the alpha coefficient will control Q; this is the same structure as 
Robert has shown.

But. That way ****fts the strong dependence on alpha from peaks to 
troughs, which were pretty insensitive in the unnormalized version, 
as Wikipedia's graphs show. (Specifically, the minima will approach 
zero instead of 1/2 as |alpha| increases.) If that's fine with you, 
great. Otherwise describe in detail just what you wish the response 
to be across different settings -- what shall move and what is to 
stay put.


Martin

-- 
Why is 6 afraid of 7?
Because 7 8 9.