> > The very first MS20 type filter prototypes (HP and
> > LP) are working. It seems
> > that we found a solution to go from HP to LP with a
> > rotary control (instead
> > of the switch suggested by some members) so that
> > only one type of the module
> > will have to be manufactured (not a LP and HP
> > version). But a lot of
> > "strange things" happen in the transition stage (not
> > simply a band pass) due
> > to the special filter design - especially for higher
> > resonance settings. But
> > we think a rotary control is better than a switch -
> > despite the "strange"
> > effects in the transition stage. If one only wants
> > to have LP or HP simple
> > turn the control fully CCW resp. CW. Voltage control
> > of this function seems
> > not to be possible as real resistors with
> > comparatively low values have to
> > be varied. Maybe we could do it with vactrols, but
> > VCAs (as normally used
> > for VC applications) cannot do this job in the
> > circuit.

i like the idea of the rotary control.
imho it is a really good decision to do a single
ms20 module with variable filter mode.
kudos to the one who suggested that at first.


best wishes

ingo