[sdiy] SID

[Jim Patchell]

Rainer Buchty wrote:

>
> And here comes my question to the digital filter gurus: Is it possible to
> design something like a tunable digital filter *without* realizing that
> tuning through manifold tables of coefficients but just by the digital
> counterpart of a CV input? If yes, it'd be great if somebody could direct
> me to books to read, web sites to visit, etc.
>
> Rainer
>

    I am no digital filter guru, but, I have made tunable digital filters (in
fact, good old state variable filters).  Where I got the info to do this was
from "Musical Applications of Microprocessors", by Hal Chamberlain.  The code
in the book was in basic, but it was pretty easy to implement the filters in a
DSP56002.

    -Jim