Mono/Poly (was: beating a dead DAC )

[Osamu Hoshuyama]

Hello, JH and Russ,

> Date:    Fri, 14 Jan 2000 15:01:05 +0100
> From:    "jhaible" <jhaible at debitel.net>
> 
> > Yes, the Mono/Poly used the SSM2033, I just abbreviated it to SSM's.
> > It does have an internal heater and it uses a tempco. That's why out of
> > all the synths with analog VCO's, this one seems to have the most stable
> > and "in tune" oscillators to my ears, and my frequency counter.
> 
> Both heater *and* tempco resistors for the VCOs ??
> That's strange. If you're sure about that, I'll dig up the schemos and take
> a look !

The big (1W or 2W) resisters on SSM2033s are for heating the chips.
I've read an interview of the designer of Mono/Poly in a Japanese
book.

Mono/Poly and Poly6 are the first V/Oct synths for KORG.
He said that they were used with the great stability of Hz/V VCOs and
was not satisfied with the stability of 2033 itself, so he added that
big resisters (heaters) to get sufficient stability.

- -- ---- ----------- --- --- - ----- -- --- --- - - ------ - - - --
 Osamu HOSHUYAMA          Digital Signal Processing Technology Group
                    C&C Media Research Laboratories, NEC Corporation
               Email: houshu at ccm.CL.nec.co.jp,  Fax: +81-44-856-2232
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