[sdiy] KorgMS20 mods? help?

[dj hohum]

While I think all of those mods are great and I could hardly be called
a purist, unless those mods are well done you will certainly devalue
your instrument. Fortunately or unfortunately depending on one's
perspective, the MS-20 is one of those instruments that's worth quite
a bit more when in original shape.

I think greg's advice is solid. If you haven't done things like that
before then starting on an MS-20 is a risky move. Alternatively,
another way to pick up skills and additional modules at the same time
is to build a small companion modular from kits, or, even better, just
circuit boards. I can highly recommend Ken Stone's boards. Building
his boards is relaxing like building a kit but with enough room for
deviation that it doesn't become boring. If you want everything in the
bag for you then both blacet and paia give you everything you need
down to the power cable. While I prefer the blacet build quality I'd
have to give the nod to paia in terms of beginner appeal.

The thing to get from building is not necessarily just the process of
building, rather, it's to understand how to do the mods that you're
asking for without worrying about frying things. Adding an LFO, for
example, is trivial. You only need to connect it to the power supply
and drill holes.

But, if you really want to go for it, here's some of what you asked for:

http://www.korganalogue.net/korgms/service/ms20/m20s.html

daryl



On 7/27/07, peter edwards <synth at casperelectronics.com> wrote:
> I see that there's been a fair amount of discussion in this group
> concerning the Korg MS20 (great rebuild by Julian btw!! http://
> www.port23.co.uk/ms20/) so I hope this isn't a tired topic......
> I've owned an MS20 for about 7 years now and haven't had a single
> problem. What a great synth! Now that I've really gotten to know
> every bit of this machine, I'd like to take it further and expand
> it's functionality. I love this synth and would hate to fry it so I'm
> taking the cautious approach and looking to those with more
> experience than I for some pointers.
> I'm interested in adding some controls like a pulse width CV input as
> well as further patching options like ring mod inputs and an EXT in
> mixer. I would also love to add some modules like one or two more
> LFOs and CV mixers.  Has anyone looked into modularizing?? VCO
> outputs, VCF ins and outs. I suspect that it would be more trouble
> than it's worth.
> Anyone out there with some experience who could give me some advice,
> schematics, links, etc...
> I'm not a pro, but I've got some experience and I'm real good at
> following directions.
> Thanks!!
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