Korg Poly800/EX800 Users

If necessary, i can pop mine open and take pictures or trace things.

--- In korgpolyex@yahoogroups.com, "narfman96" <narfman96@...> wrote:
>
> Hi Mike,
> This is partially why I uploaded the Service Docs and Schematics to 
> the files section. You are right the ROM is on the digital delay pcb.
> Fran 
> 
> --- In korgpolyex@yahoogroups.com, "korgpolyex800" 
> <korgpolyex800@> wrote:
> >
> > Does anyone have a copy of the MKII service manual or schematic?
> > 
> > Because that would be a big help in working out if the kit could be
> > fitted into it.
> > 
> > I once saw the inside of a Poly 800 MKII and it had a much larger 
> ROM
> > installed and a totally brand new board where the ROM lived. The ROM
> > socket on main board had jumper cables running over to the new 
> board.
> > It was quite a mess.
> > 
> > The schematic diagram of the MKII would put the question to rest.
> > 
> > Mike.
> > 
> > 
> > 
> > --- In korgpolyex@yahoogroups.com, "narfman96" <narfman96@> wrote:
> > >
> > > The firmware is here in the files section.
> > > 
> > > --- In korgpolyex@yahoogroups.com, "Alexander" <arf_hotdogdeity@> 
> > > wrote:
> > > >
> > > > I'd definitely like to try to make it work. 
> > > > Does anyone have a ROM image of the MKII? The biggest 
> difference 
> > > seems
> > > > to be the digital delay line instead of the chorus.
> > > > 
> > > > --- In korgpolyex@yahoogroups.com, "korgpolyex800" 
> <korgpolyex800@>
> > > > wrote:
> > > > >
> > > > > Alex,
> > > > > 
> > > > > I like your humour. :-)
> > > > > 
> > > > > If I ever buy a MKII I will look at the design and see if it 
> > > could be
> > > > > fitted into it.
> > > > > 
> > > > > But the kit only works in the EX800 and Poly MK1. It does not 
> > > work in
> > > > > the MKII. Sorry :-(
> > > > > 
> > > > > Mike.
> > > > > 
> > > > > --- In korgpolyex@yahoogroups.com, "Alexander" 
> <arf_hotdogdeity@>
> > > > > wrote:
> > > > > >
> > > > > > People spend a lot more than that on glitchy hardware. Look 
> at 
> > > the
> > > > > > SIDStation. It's a crashy glitchy mess but people still 
> bought 
> > > them :)
> > > > > > 
> > > > > > I want one of these for my MKII :) 
> > > > > > 
> > > > > > --- In korgpolyex@yahoogroups.com, Michael Hawkins 
> > > <korgpolyex800@>
> > > > > > wrote:
> > > > > > >
> > > > > > > The only name I have on those first five boards is Mike! 
> LOL
> > > > > > > 
> > > > > > > But if they work straight out of the box, which would be 
> a 
> > > miracle,
> > > > > > then you never know what your luck might be. :-)
> > > > > > > 
> > > > > > > I'm certainly glad my kit is getting so much attention. 
> The 
> > > real
> > > > > > question is going to be "how many people want to spend 100 
> > > bucks on a
> > > > > > kit that gives you glitchy portamento mono mode"?
> > > > > > > 
> > > > > > > Mike.
> > > > > > > 
> > > > > > > Marcus Wilson <JB@> wrote:                               
> have 
> > > you
> > > > > > got names against those 5 boards yet?
> > > > > > > 
> > > > > > > 
> > > > > > > If not, I would like to be included in the first batch 
> > > > > > > 
> > > > > > > 
> > > > > > > best regards,
> > > > > > > 
> > > > > > > 
> > > > > > > Marcus Wilson
> > > > > > > 
> > > > > > > On 11/12/2007, at 9:57 PM, korgpolyex800 wrote:
> > > > > > > 
> > > > > > > Hi Atom,
> > > > > > > 
> > > > > > > I agree with everything you said.
> > > > > > > 
> > > > > > > i) I'll keep portamento even if it is glitchy.
> > > > > > > ii) I'll change the Poly key to be the mode key so that 
> each
> > > > time you
> > > > > > > press the Poly key you switch to the next mode (Poly, 
> Chord, 
> > > Hold,
> > > > > > > Mono, Poly...).
> > > > > > > iii) there will be CC's to change the mode too.
> > > > > > > iv) for visual indication P for poly is already used so 
> we 
> > > need to
> > > > > > > come up with a letter that would indicate portamento mono 
> > > mode. I
> > > > > > > thought "S" would work but it looks like a "5". Anyone 
> got any
> > > > > > > suggestions?
> > > > > > > 
> > > > > > > Further testing last night revealed that the bend is so 
> slow 
> > > to
> > > > react
> > > > > > > to changes at higher slide rates that the portamento 
> rapidly 
> > > turns
> > > > > > > into stepped DCO semitone changes. So it sounds best at 
> > > really slow
> > > > > > > rates where you glide from one octave to another over a 
> period
> > > > of 5 to
> > > > > > > 10 seconds. Even then you can still hear the little 
> glitches. 
> > > My
> > > > last
> > > > > > > option now is to try to speed up the master clock 
> reaction to 
> > > bend
> > > > > > > changes and try to improve the sample and hold circuit. I 
> > > wish I
> > > > had a
> > > > > > > frequency counter and oscilloscope right now.
> > > > > > > 
> > > > > > > But, when I run into walls like this I take a break so 
> that I
> > > > can come
> > > > > > > back to it with a fresh perspective so I think I'll leave 
> it 
> > > all
> > > > alone
> > > > > > > as I have other pressing work to do.
> > > > > > > 
> > > > > > > Wish those 5 boards would get here soon.
> > > > > > > 
> > > > > > > Mike.
> > > > > > > 
> > > > > > > --- In korgpolyex@yahoogroups.com, Atom Smasher <atom@> 
> wrote:
> > > > > > > >
> > > > > > > > On Mon, 10 Dec 2007, korgpolyex800 wrote:
> > > > > > > > 
> > > > > > > > > I could rewrite the code to toggle between Poly and 
> mono 
> > > mode
> > > > > > > using the 
> > > > > > > > > Poly key. Another way might be to make the Poly key 
> the 
> > > selector
> > > > > > for 
> > > > > > > > > Poly, Mono, Chord and Hold mode. Each time you press 
> the
> > > > poly key
> > > > > > > would 
> > > > > > > > > move you into the next mode. That would free up the 
> chord 
> > > and
> > > > > hold 
> > > > > > > > > buttons to be used for selecting global mode and 
> extended
> > > > > parameter 
> > > > > > > > > entry modes (or other things if we decide to add 
> more).
> > > > > > > > >
> > > > > > > > > What do you all think?
> > > > > > > > ================================
> > > > > > > > 
> > > > > > > > that would work, since the modes are (or can be) 
> > > exclusive...
> > > > > > > probably not 
> > > > > > > > everyone on the list has a PC1600 (or similar), but i'd 
> be
> > > > happy as
> > > > > > > long 
> > > > > > > > as i can select the modes using standard MIDI CCs. do 
> you 
> > > think
> > > > > > > you'd be 
> > > > > > > > able to provide visual indication of which mode is 
> currently
> > > > > selected?
> > > > > > > > 
> > > > > > > > 
> > > > > > > > > I now need to determine if the glitch is caused by 
> the 
> > > master
> > > > > clock 
> > > > > > > > > being incapable of tracking the output of the DAC 
> when a 
> > > square
> > > > > > wave 
> > > > > > > > > edge change occurs in the bend or if the DAC sample 
> hold 
> > > circuit
> > > > > > > is too 
> > > > > > > > > slow. If it's just the sample and hold then I may be 
> able 
> > > to
> > > > > > > reduce the 
> > > > > > > > > sample hold capacitor to improve the highest possible 
> > > rate of
> > > > > > > change. If 
> > > > > > > > > it is due to the master clock not being able to change
> > > > frequencies
> > > > > > > fast 
> > > > > > > > > then I think we might be out of luck. So much so that 
> the 
> > > only
> > > > > > way to 
> > > > > > > > > get good portamento would be to build a new master 
> clock
> > > > that was
> > > > > > > able 
> > > > > > > > > to slide the full five octaves.
> > > > > > > > ==================
> > > > > > > > 
> > > > > > > > maybe you'll come up with a different way to approach 
> the
> > > > problem..?
> > > > > > > > 
> > > > > > > > even if it's glitchy, i'm sure it's still usable... i 
> was 
> > > just
> > > > > > > talking to 
> > > > > > > > tom (the guy who i made the first moog-slayer for) and 
> he
> > > > > reminded me 
> > > > > > > > about a patch i wrote for him on a CZ-101... listening 
> to it
> > > > > > > straight from 
> > > > > > > > the CZ it sounded kinda cold and very digital, but in 
> the
> > > > > > foreground of 
> > > > > > > > the mix and with some reverb (we probably used a BOSS 
> SE-
> > > 50) it
> > > > > > sounded 
> > > > > > > > sweet and analog and warm and huge. years later it 
> still 
> > > impressed
> > > > > > > him. so 
> > > > > > > > i'd be interested in it even if it is glitchy...
> > > > > > > > 
> > > > > > > > and if you "fix" it in a later release, leave the 
> option of
> > > > > using the 
> > > > > > > > glitchy version... seriously... one never knows what 
> genres 
> > > of
> > > > music
> > > > > > > might 
> > > > > > > > be formed from an obscure glitch...
> > > > > > > > 
> > > > > > > > 
> > > > > > > > -- 
> > > > > > > > ...atom
> > > > > > > > 
> > > > > > > > ________________________
> > > > > > > > http://atom.smasher.org/
> > > > > > > > 762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808
> > > > > > > > -------------------------------------------------
> > > > > > > > 
> > > > > > > > "What luck for rulers, that men do not think."
> > > > > > > > -- Adolf Hitler
> > > > > > > >
> > > > > > > 
> > > > > > > 
> > > > > > > 
> > > > > > > 
> > > > > > > 
> > > > > > > 
> > > > > > > 
> > > > > > > 
> > > > > > > 
> > > > > > >      
> > > > > > >                                
> > > > > > > 
> > > > > > >        
> > > > > > > ---------------------------------
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