Korg Poly800/EX800 Users

The Maxim DS1660 is bipolar +/- 5 volt. Will this work? I read the 
Max5160 datasheet could it be used with an op amp for feedback 
control?

--- In korgpolyex@yahoogroups.com, "korgpolyex800" 
<korgpolyex800@...> wrote:
>
> Thanks for that Dave,
> 
> The problem I'm having right now is choosing the right digital
> potentiometer for the job. The versions that I got as samples from
> Maxim are only 5Volt operation. No good for the Poly because the 
audio
> is 10V (-5<->+5).
> 
> Analog devices does one that is 10-30V but then the logic control is
> difficult because it would "see" logic zero only at -5 volts which
> doesn't match up the Poly either.
> 
> I have the same problem with the FM mod too because you want to be
> able vary the amount of DCO that is injected into the VCF. Once 
again,
> the range is -5<->+5.
> 
> So I am kinda scratching my head right now.
> 
> Mike.
> 
> 
> --- In korgpolyex@yahoogroups.com, "David Mochen" <davidmochen@> 
wrote:
> >
> > Hi
> > 
> > Just a small note... Atom's great design has been tweaked a bit by
> this guy Olaf, who replaced the 50k cutoff pot with a 100k pot for a
> broader response. I am using 100k on my Poly and the sweeping range 
is
> very very sweet. You might want to try 50k and 100k for your 
aTomaHawk
> board :)
> > 
> > Of course Mike, you might as well want to add a switch for 
toggling
> on/off MoogSlayer. Olaf did this also via a hardware switch...
> > 
> > thanks galore
> > 
> > Dave
> > 
> > ps: glad that the aTomaHawk moniker caught on! :D
> > 
> >   ----- Original Message ----- 
> >   From: korgpolyex800 
> >   To: korgpolyex@yahoogroups.com 
> >   Sent: Monday, March 17, 2008 2:21 PM
> >   Subject: [korgpolyex] Moog Slayer mod - question
> > 
> > 
> >   Hi Atom,
> > 
> >   I am working on the new aTomaHawk board mod kit and have a 
question
> >   for you.
> > 
> >   Is the only reason you replaced VR2 with a pot so that you could
> >   control VCF cutoff via a knob instead of via the VCF cutoff 
parameter?
> > 
> >   Because it appears to me that providing cut off control via the
> >   existing circuitry will work just fine. The goal is to provide 
a knob
> >   to control control cut off.
> > 
> >   Then, you replaced VR5 so that you could really push the 
resonance
> >   into self oscillation. That will definitely need a digital
> >   potentiometer put in its place. However, I am wondering why you 
use a
> >   log pot. I would have thought that the resonance response on the
> >   filter chip would have been linear. And you ground one side 
which is
> >   completely different to the way the trimmer is set up. Why?
> > 
> >   Thanks for your help,
> > 
> >   Mike.
> >
>