Vintage Synth Repair

Hi everyone,

This might be a stragne question, maybe not, but I reckoned you guys here would know the answer.

If I wanted to control a 'Moog Modular Oscillator' from the Gate and CV outputs of a Korg MS-20... would it be possible, as I know they use totally different voltage control systems. Can they be interfaced?

Cheers,
TOM

I don't know what is Moog Modular Oscillator, and why it should need  
Gate signal. Gate or trigger is used to start envelopes, it has  
nothing to do with VCO.

But general answer is yes, everything is possible with proper  
convertors. You will need to change Korg trigger to S-trig, and Hz/V  
to V/oct for Control Voltage.

Daniel Forro

On 28 Sep 2010, at 1:16 AM, Quazimodo wrote:

> Hi everyone,
>
> This might be a stragne question, maybe not, but I reckoned you  
> guys here would know the answer.
>
> If I wanted to control a 'Moog Modular Oscillator' from the Gate  
> and CV outputs of a Korg MS-20... would it be possible, as I know  
> they use totally different voltage control systems. Can they be  
> interfaced?
>
> Cheers,
> TOM

Hi Daniel,

I was meaning the Moog 901a and 901b modules...;c)

Cheers,
TOM 




--- In vintagesynthrepair@yahoogroups.com, Daniel Forró <dan.for@...> wrote:

>
> I don't know what is Moog Modular Oscillator, and why it should need  
> Gate signal. Gate or trigger is used to start envelopes, it has  
> nothing to do with VCO.
> 
> But general answer is yes, everything is possible with proper  
> convertors. You will need to change Korg trigger to S-trig, and Hz/V  
> to V/oct for Control Voltage.
> 
> Daniel Forro
> 
> On 28 Sep 2010, at 1:16 AM, Quazimodo wrote:
> 
> > Hi everyone,
> >
> > This might be a stragne question, maybe not, but I reckoned you  
> > guys here would know the answer.
> >
> > If I wanted to control a 'Moog Modular Oscillator' from the Gate  
> > and CV outputs of a Korg MS-20... would it be possible, as I know  
> > they use totally different voltage control systems. Can they be  
> > interfaced?
> >
> > Cheers,
> > TOM
>

no, tom, not directly, as you correctly surmise, the two manufacturers used different scaling systems. yamaha & korg went hz/volt (except for the korg mono/poly, for some reason- the SSM chips maybe?) while moog, roland, arp & others are volt/octave.

I'm not even sure that anyone ever made a converter; it would need to be a high-quality exponential-to-linear voltage converter. would it be worth it? why not try combining the moog boits you have with a different synth than the ms20?

d.

Korg made a converter, The Korg MS-02 (Not MS-20 lol)
 
They are not that common, and cost a few bucks when they come up.





  



no, tom, not directly, as you correctly surmise, the two manufacturers used different scaling systems. yamaha & korg went hz/volt (except for the korg mono/poly, for some reason- the SSM chips maybe?) while moog, roland, arp & others are volt/octave.

I'm not even sure that anyone ever made a converter; it would need to be a high-quality exponential-to-linear voltage converter. would it be worth it? why not try combining the moog boits you have with a different synth than the ms20?

d.

Thanks Mike,

We have the MS-02 schematics here somewhere I belive so it would be quite easy to build the 'Log Amp' as I think it's called.

Also - I think the Korg and the Moog system for trigger is both S-trig if I'm right? If so then they would directly interface trigger-wise, it would be just the CV side I would need to 'doctor'.

Cheerz,
TOM





--- In vintagesynthrepair@yahoogroups.com, Mike de Vries <mrjdevries@...> wrote:

>
> Korg made a converter, The Korg MS-02 (Not MS-20 lol)
> Â 
> They are not that common, and cost a few bucks when they come up.
> 
> 
> 
> 
> 
> Â  
> 
> 
> 
> no, tom, not directly, as you correctly surmise, the two manufacturers used different scaling systems. yamaha & korg went hz/volt (except for the korg mono/poly, for some reason- the SSM chips maybe?) while moog, roland, arp & others are volt/octave.
> 
> I'm not even sure that anyone ever made a converter; it would need to be a high-quality exponential-to-linear voltage converter. would it be worth it? why not try combining the moog boits you have with a different synth than the ms20?
> 
> d.
>