Korg Poly800/EX800 Users

Actually, I wasn't quite right in my description.  The vcf isn't affected at all by the mod 
pot.

-Tim


--- In korgpolyex@yahoogroups.com, "serotonic_sound" <sero-tonic@...> wrote:
>
> Hey Mike,
> 
> Thanks for your help...I did what you recommended...I'm not sure what you were 
> expecting the results to be but I'm getting the following:
> 
> 1) The pitch pot only works the first half of its range.  From Full Left To Center increases 
> the pitch from about a 5th down to normal.  But, the second half (Center to Right) does 
> nothing.  I would have expected the pitch to rise above normal.
> 
> 2) The Mod pot also only does something through the first half of its range...I don't 
know 
> exactly what the behaviour of the joystick was originally, but I find that with the DCO 
> amplitude mod parameter set to 0 I can mod the dco mod go to 15 with the pot. (Its at 
15 
> when the pot is in the middle).  With DCO set to zero the pot does nothing to the DCO.  
> With the vcf mod parameter set to zero the pot does nothing to the vcf.  With the vcf set 
to 
> full, the pot increases the vcf from off to full.
> 
> I used all the wires from the existing 1b connector and tapped -5 (blue) to one side of 
the 
> pots, +5 (red) to the other side of the pots.  Then attached one middle post to 1-4B and 
> the other middle post to 1-5b...Sound right?
> 
> I verified that the pots are sending -5 through +5 volts with zero in the middle through 
> 1-4B and 1-5B.
> 
> I can play in tune again, but the results aren't quite what I was expecting...
> 
> What do you think?
> 
> Thanks again for your help...
> -Tim
> 
> 
> 
> --- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@> wrote:
> >
> > If I were in your situation I wouldn't touch the existing trim pots.
> > 
> > And, I would use two 10K linear pots or trimpots to fake the missing joystick 
assembly.
> > 
> > Connect the left and the right side of both pots to -5V and +5V.
> > 
> > And connect the wipers of each to connect pin 1-4B and 1-5B.
> > 
> > This will allow you to set the VCF/DCO modulation to zero as well as pitch bend.
> > 
> > If you use pots you could even make a plate to go over the joystick hole and mount 
the 
> pots right there.
> > 
> > I still think you should pop a new joystick in there though. LOL
> > 
> > Mike.
> > 
> > 
> > 
> > 
> > ________________________________
> > From: Gordon J. C. Pearce MM3YEQ <gordon@>
> > To: korgpolyex@yahoogroups.com
> > Sent: Thursday, February 12, 2009 6:44:20 AM
> > Subject: Re: [korgpolyex] Missing Joystick board (KLM-599) "mod"
> > 
> > 
> > On Thu, 2009-02-12 at 08:44 +0000, serotonic_sound wrote:
> > 
> > > Gordon, you said I could potentially wire up a couple of 4.7K resistors... but it looks 
> like 
> > > that board has a few more components, where would I install these resistors 
exactly 
> given 
> > > that I'm missing the entire joystick assembly and board?
> > 
> > I'll dig out the Poly-800 and draw out the circuit of the joystick board
> > later today.
> > 
> > Gordon
> >
>