code_pig@y...> wrote:

> using a true Sallen-Key
> filter for bandpass purposes isn't really advised, as the input
> resistor is a very low value, and changing the value also

changes the

> overall behavior and characteristics of the filter.

thanks kevin,

interesting..

actually, i think i misarticulated by saying 'fuzzy bandpass' ..what i
meant was more general, like a fuzzy midrangy mellowness.

..looking at the ms20, it has a LP and a HP (no BP) so adjusting
the 2 filters towards each other (in series) is what gave me a
band pass. and of course if i continue turning the knobs this
direction the cutoff freqs overlap and the filters cancel each other
out. so this is what i was referring to when i mentioned the
pleasant bandpass sound..all that stuff in between.

also, maybe worth noting that neither filter is multimode, both
fixed mode, so no chance of bandpass within either sallen-key
circuit. perhaps the risky sallen-key / bandpass scenario you
mention is a reason the two korg filters are configured the way
they are.

i really like the 2 pole..how does this filter-differentiation
correspond in terms of db slope 2 pole = ( )db slope this
excursion also perks my interest in the a108..and attention to
controlling slope in general.
-duff