Archive of the former Yahoo!Groups mailing list: Korg Poly800/EX800 Users

no, you don't have a variable cutoff, you just set it, and then have an
on/off switch where you bypass the filter for normal/no portamento.
it's a sim of a real analog portament. i'm not 100% on how it
actually make it do the porta, i think it acts as a slew (although
that might be the 'Rate' time based type ?).

and i think i found a value of 0 to work best. i would have to look at my
synthedit file, that's what i did it in.

let's see if i can show it here/

pitch CV>>SwitchOn>>LPF>>>>>Osc PitchCV in
                SwitchOff>>>>>>>>>>Osc PitchCV in

so, whatever you need to do to code that in C++
(would love to see what that looks like btw, i know nothing
about C++, really should learn a bit)