[sdiy] Modding the MKS-30 - Looking for suggestions

[Bob Weigel]

That's not quite true actually. Polysix uses those chips but the poly61 
has 13600 based filters.  It does have the EG's though.

Your best bets are probably CEM3328's scrapped from a bad Ensoniq 
Mirage, or bad ESQ1 or ssm2044's from a bad Siel Expander or DK600 if 
you are too far away not to have me fix it :-) . (so many nightmare 
repairs on those)  The filters in the stock MKS30 are same as the 
juno106 of course and they are usually OK.  It's usually the vca that 
fails from what I've seen.  If you clip the last 3 pins as I 
recall...and build another vca.  So don't throw away those bad chips! - 
-Bob

Florian Anwander wrote:

> Hi dj
>
>> While I really like the CEM3372, they are expensive and this is an 
>> experiment. I'm all ears if anyone knows where I can buy 3372s for a 
>> reasonable price.
>
> Check ebay for a used ESQ1 should go for around $100-$130 (at least 
> here in germany). There in are 8 of them.
> Lately I missed a Korg Poly61: 6 SSM 2044 and 6 SSM 2256  for 40 Euros 
> (I simply talked too long on the phone with a friend and forgot to hit 
> the "validate the offer"...)
>
>
>> Those are good ideas. What do you think might be the most interesting 
>> configuration?
>
> I am not sure about what you can miss and what not. I prefer the 
> VCF-FM over all.
> Another idea for CEM3372 is the Oberheim inspired multitype filter, as 
> Doepfer made it with the A107 Morphing filter and will do with the 
> forthcoming A135-2 series (remember the discussion about the Elka 
> Synthex pads, which are band pass based).
>
> At the moment I am planning an extension for my MonoPoly. I will feed 
> the four voices (CV, Gate and VCO out) to a breakout box. After this 
> breakoutbox I will put some kind of semi modular four voice VCF, VCA, 
> Panner; maybe also I will add a second VCO per voice. It will 
> definitely contain a lot  of controllable crossmodulation (LFOs, 
> Wheels, joysticks...).
>
>
> Aah, btw: If you want to experiment, what combi of functions and 
> modulating interactions is good or not, then try a nord modular - its 
> perfect for planning sound architectur, especially when you decide to 
> use only a few basic modules.
>
> Florian
>
> Florian
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