MIDI to Korg MS-10 Adaptations Re: [sdiy] midi2CV

[Magnus Danielson]

From: Cynthia Webster <cynthia.webster at gte.net>
Subject: MIDI to Korg MS-10 Adaptations Re: [sdiy] midi2CV
Date: Thu, 28 Aug 2003 02:27:09 -0700

> > on 8/28/03 12:49 AM, gilwein at walla.co.il at gilwein at walla.co.il wrote:
> > 
> > great link !
> > 
> > Are those ICs common parts ?
> > 
> > I need a MIDI2CV for my Korg MS-10.
> 
> Well, it is not so simple as far as I understand it.
> 
> I believe that the Korg MS-series was the last
> of the Korgs to use ~Linear~ Control voltages internally...
> 
> as opposed to the ~Exponential~ control voltages that
> virtually everyone else in the industry was/is using,
> (with the possible exception of Paia kits at the time).

Now, to make things a little less simple.... it ain't that easy!

I don't know about the MS-10 (somebody PLEASE send me schematics!) but for the
MS-20 you would be supprised to find that this "Linear" machine actually has a
small bunch of exponential converters in it. Some of the hidden
signalprocessing uses the expo-path while the external input uses the linear
path. This is why the MS-20 to some degree have the feeling of a expo-machine.
You could convert it into a expo-machine without too much of a rebuild.

> So be aware that to MIDI-ize your wonderfully idiosyncratic MS-10
> you may very well need to install some sort of Exponential Converter
> as a front end to the Korg to make it compatible with 99.99999 %
> of the MIDI adapter kits available.
> (is there a linear adapted version available anywhere?
> Maybe Paia?)

The Paia MIDI2CV has a linear adapter-option.

> Best Wishes!
> 
> Cynthia

What people doesn't know is that Cynthia and I share a deep secret, and that is
in our first step onto the carieers we have ;O)

Cheers,
Magnus - proud owner of a MS-20 - unmodded!