Korg Poly800/EX800 Users

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
> 
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>   http://atom.smasher.org/
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