Korg Poly800/EX800 Users

I'm glad there are other sane people on this list that can help me get
through life.

Those are the samples I have. LOL - I will get to work on it straight
away.

Mike.

--- In korgpolyex@yahoogroups.com, "narfman96" <narfman96@...> wrote:
>
> 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.
> > >
> >
>