[sdiy] EDP Wasp filter filter cutoff input?

[Julian]

Hi there,

Im after a CV input to the filter cutoff, and then idealy the PWM too.  I
see analogue solutions offers these mods, so i know theyre possible...

Anyway, looking at the schematics, is it (the cutoff) as simple as bringing
in a connection just after Q1, before R21/22, where the signal from the
origional filter controll feeds to the filter itself?  Just before pin 5 of
the CA3080?

Im guessing (im a novice) that Q1 is used as an amplifier.  If so, im
thinking for my +/- 2.5 to 8 volt controll signal, after the transistor
would be good?  Should i be thinking of adding higher value resistors to
this input?  (my wasp is at a friends at the moment, so i cant see the sort
of voltage at these points normally)

Please tell me if im way off track.  Id rather know now then when i make
errors.

Thankyou, Julian