Korg Poly800/EX800 Users

Jusuf,

I think you could actually replace the existing BBD MN3209 with a
MN3208 and that would expand the delay since the 3209 is only 256
buckets while the 3208 is 2,048.

And I think varying the clock would be a great idea as well as feedback.

Let us know how it goes.

Mike.

--- In korgpolyex@yahoogroups.com, "jusufzemplin" <jusuf@...> wrote:
>
> Hi,
> 
> Chorus in Poly800 has some reserves  - theres no signal feedback.It 
> is possible to lead feedback from pin 7 thru potentiometer to pin 3 
> of MN3209. I have dismounted it momentally, so I am not sure, if I 
> had connected it directly from pins, or somewhere from input (Q4,Q5) 
> and output (Q7) circuit. I added picture to the Pictures section. 
> This feedback makes more fat chorus. 
>   Next Chorus-mods are available on modulation signal - MN3102 makes 
> 2 clocks signals for MN3209. And MN3102 is modulated with triangular 
> LFO on pin 7. I have to look at home on it today. And I have digi-
> camera now, so I will add more pictures. 
> 
> Jozef
> 
> --- In korgpolyex@yahoogroups.com, "korgpolyex800" 
> <korgpolyex800@> wrote:
> >
> > Sorry your post didn't make it through the ether. At least this one
> > made it through.
> > 
> > Nice mod you've done and tidy work too.
> > 
> > Unison is a big goal. Especially when attempting to do portamento -
> > which is really what I want to do.
> > 
> > I'm not sure how the chorus is set up. I haven't looked at it very
> > closely but if it is a bucket brigade chip then there are probably
> > quite a few things that could be done. I have my hands full as it is
> > right now so I won't be poking around in the chorus any time soon.
> > 
> > Cheers,
> > 
> > Mike.
> > 
> > --- In korgpolyex@yahoogroups.com, "bys_jhn" <bys_jhn@> wrote:
> > >
> > > i had a nice post all typed out and it didnt get posted.  bummer.
> > > 
> > > anyway, im excited about all this talk of modding the poly 
> 800...  im
> > > an ex 800 owner myself, and have done the moog slayer mod, the FM 
> mod,
> > > and am working on an audio input mod where there is a knob that 
> fades
> > > between the noise source/audio input, before all the rest of the 
> voice
> > > architecture... 
> > > 
> > > mike, i have a couple requests for the new os:  
> > > 
> > > id love to have a unison mode with detune.  this would be useful 
> for
> > > hoover type sounds.  
> > > 
> > > are there any plans to expand on the sonic capabilities of the 
> chorus
> > > unit?  its a bucket brigade style chip if im not mistaken... 
> could it
> > > be tweaked into something more useful?
> > > 
> > > how about midi out while using the sequencer/arpeggiator?  it 
> would be
> > > cool if we could still use it to run another keyboard.
> > > 
> > > finally heres some pics of my modded ex 800:
> > > 
> > > http://i127.photobucket.com/albums/p144/alien_brain/DSCN0481.jpg
> > > 
> > > http://i127.photobucket.com/albums/p144/alien_brain/DSCN0468.jpg
> > > 
> > > http://i127.photobucket.com/albums/p144/alien_brain/DSCN0464.jpg
> > > 
> > > cheers all!
> > > 
> > > john
> > >
> >
>