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Subject: Re: Enabling portamento mono mode

From: "narfman96" <narfman96@...>
Date: 2007-12-14

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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