Archive of the former Yahoo!Groups mailing list: Korg Poly800/EX800 Users

yeah but i'm okay with that. i mean - if you want to turn the poly-800 into a monosynth... you don't need to add any functionalities, just take the polyphony away. portamento is an added bonus but if we're talking monophonic then portamento on the master OSC is perfectly okay.

if we could detune each voice separately or to add envelopes so each voice would have its own would be an awesome thing but i guess it's not possible (judging from what you said)

what about alternative waveform options? the way it is now tells me that there ∗are∗ some possibilities... does anyone know how the thing really works?

jure

On 10/18/06, korgpolyex800 <korgpolyex800@...> wrote:

Jure,

Looking at the schematics.

The joystick and modulation (from the LFO) are fed into the master
oscillator. The master OSC is fed to the first four voices and the
detuned oscillator goes into the second four voices. The detuning is
not an oscillator but rather is a divider/multiplier that takes the
master OSC as its input. The detune is just fine tuning around the
master OSC.

The LFO and Joystick do the major sliding. In the EX800, you can send
pitch wheel (to replace the joystick). So there is a D to A converter
in there that provides the feed into the master OSC.

So portamento could be done with a slide from one octave to the next
whereupon the TG would switch octaves while the analog OSC control
would reset back to zero and start the slide again on to the next octave.

Thinking about this though, since all of the voices ultimately take
their OSC from the master and since there is only one voltage control
input to the OSC. We are only going to be able to do single note
portamento.

Oh well.

Mike.

--- In korgpolyex@yahoogroups.com, "Alexander" <arf_hotdogdeity@...>

wrote:
>
> Mike, just bite the bullet and set it up with an Oberheim-style
> modulation matrix ;) (just kidding!)
>
> If the first bank of four is synced to the master clock any slides you
> do to that are going to affect the second bank as well. I don't think
> this is the case though. From the sound of the oscillators they've got
> separate clocks. In double osc mode with the detune parameter set to
> 00 you can occasionally get changes in timbre where the two oscs are
> the same frequency but out of phase.
>
> --- In korgpolyex@yahoogroups.com, "korgpolyex800" <korgpolyex800@>
> wrote:
> >
> > I think you're right.
> >
> > The first bank of four voices runs off of a master clock and the
> > second bank of four voices is detuned from the master.
> >
> > So unison mono should be able to be either Single (a single voice) or
> > Double mode (two voices detuned from each other). Any more than that
> > is redundant (unless we add a second filter - OK now we're getting a
> > bit out of hand).
> >
> > Portamento is either mono (one voice only) or double (two voices per
> > note) with up to four sliding notes. Or Poly (up to eight
> > simultaneously sliding notes).
> >
> > And wouldn't it be nice to be able to slide notes from high side and
> > low side into one note - simultaneously. Or apply LFO to either, one
> > inverted to the other.
> >
> > Wow! This could take a while.
> >
> > Mike.
> >
> >
> > --- In korgpolyex@yahoogroups.com, "jure zitnik" <kokoon@> wrote:
> > >
> > > so you mean the non-unison mono mode would still trigger separate
> voices
> > > succesively? so, for instance, vca release would take effect and
would
> > > result in polyphonic effect? personally i wouldn't like that and
would
> > > prefer mono to behave as a single-osc mono synth... unison
> wouldn't make
> > > much sense cause the oscillator is a dco and all of them would be
> > constantly
> > > hard-synced (you'd notice nothing but increase in loudness?)
> > >
> > > cheers,
> > > jure
> > >
> > > On 10/16/06, patrioticduo < patrioticduo@> wrote:
> > > >
> > > > Two great questions with long winded answers.
> > > >
> > > > First, I think the MSM5232 might be able to do some primitive
> > > > frequency slides. I'm just not certain how fine grained the slide
> > > > would be.
> > > >
> > > > In my searching on the Internet, all I could find on the
MSM5232 TG
> > > > was emulation C code written by a guy called Jarek Burczynski
> for the
> > > > MAME project. The MAME project is a freeware Arcade game emulator.
> > > > Jared wrote the emulation for the MSM5232 chip because so many
> of the
> > > > old arcade games used this chip for sound generation. His code
> is not
> > > > commented nearly well enough for me to determine just exactly
> what the
> > > > chip can or cannot do. And to make matters worse, trying to
work out
> > > > what a chip does from emulation code is kind of backward. I've
> called
> > > > numerous arcade repairers looking for the datasheet. I've
tried OKI
> > > > themselves, who were helpful but ultimately failed to provide a
> > > > datasheet. And I've called a couple of other old chip
distributors.
> > > > All attempts so far have failed.
> > > >
> > > > I still have some inquiries out there. So hopefully, I will
> still get
> > > > my hands on the datasheet. In the end though, if I have to reverse
> > > > engineer the thing from scratch then so be it.
> > > >
> > > > Second, in my opinion mono node will operate in both unison
and non
> > > > unison modes. And mono mode will be designed to operate
closely with
> > > > the arpeggiator and the portmento functions. If you enable
> unison then
> > > > the arpeggiator and portmento functions (if also enabled)
operate on
> > > > all 8 voices simultaneously. If you enable mono mode without
unison
> > > > then arpeggiator would be activated per individual voice and
> > > > portamento would slide each voice independently as well.
> > > >
> > > > Right?
> > > >
> > > > Mike.
> > > >
> > > >
> > > >
> > >
> >
>