CEM filter mods? (re:studio 440)

[LMVogue]

As an extra query attached to the question on the cem3389 resonance...
(below).
I have an Ensoniq Mirage, which has eight cem3328 VCF chips, and I was
thinking something along the same lines as well, but mainly for manual
filter cutoff sweep.  So, can anyone help both of us out?  The
implementation using pots probably sounds a bit dodgy to most, but I just
want some sort of manual control (until someone figures out how to re-write
the OS to handle it)
 ; )

(Oh, one thing - I've found replacement cem3328s virtually impossible to
find, so I don't really want to just try-and-see...  hey, where's that
smoke coming from...)

cya
LMVogue  

>just wondering if anybody else has one of these beasts...
>I was looking at the cem3389 signal processor chips of which this unit
>has eight..
>I *think* I have come up with a very simple way to add resonance to the
>filters of it..
>It *seems* as though one of the pins just needs 0-5v to add
>resonance...I think I will try to just add a pot from the 5v supply to
>the res pin and see what happens..
>I *have* heard of some of these floating around with resonance knobs on
>them so it seems the legends of the mysterious studio 440 with resonant
>filters are true...

_____________________________________________________ 
                 Lee Mulvogue
              LMVogue at earthling.net
            lmulvo10 at chec.scu.edu.au

 http://www.geocities.com/SunsetStrip/Palladium/3297