Korg Poly 800 Oscillators

[patchell]

    I am now looking at the Poly 800 schematic.  My impressions were wrong, for
sure.

    The VCO seems to be a chip labled MSM5232.  It has 8 inputs that come from
a D/A converter and Sample Hold.  So off hand, I would say the pitch is
controlled by an analog signal.

Glen wrote:

> Hi,
>
> I know that the Korg Poly 800 used digitally controlled oscillators, but
> does anyone know what sort of DCO's these really are? Some companies have
> used the "DCO" phrase to refer to wavetable digital oscillators (which are
> really pure digital - not digitally controlled analog.) Other companies
> have actually built analog oscillators and then used a microprocessor to
> control them. I would consider the  oscillators in a Gleeman Pentaphonic or
> an Arp Chroma Polaris to be of this type. Both of these instruments can
> tune themselves.
>
> So does anyone know what style of DCO is in the Korg?
>
> Thanks,
> Glen Berry

--
 -Jim
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