<code_pig@y...> wrote:

> when one uses a LPF and a HPF together, what is created is
> a notch filter (see the A121 documentation for a graphic

explanation).

keven, paul,
thanks for the info and the recources. i'm confused about the
LP=HP=Notch idea though. clearly, by listening, the result of
these 2 ms20 filters in series is either HP only, LP only, or BP
(vaguely BP, when top and bottom are cut off, leaving the
middle.)
to imagine a picture of the graphical representation, i think the
curve would look like an 'M' but only during very high resonance
settings. w no resonance, however, the center of the 'M' will
become flattened or even bell-shaped across the top as the
peaks are reduced to 0. i think to achieve a notch they would
have to be in parallel which is not an option on the korg.

at any rate, thanks. i have a much clearer idea as to what is
going on behind these sounds i like.
-duff