Xpantastic!

I'll try that when I get round to servicing it...for the moment I 
found that voice 3 consistently failed the resonance and VCF tune, I 
swapped the CEM around with voice 4 and now it tunes fine.

--- In xpantastic@yahoogroups.com, "Karl" <shire03@...> wrote:
>
> Hey All,
> 
> I have had some problems with tuning on my Matrix 12 maybe this can 
> help:
> 
> I know the first impulse is always the CEM chips but I have found 
> that there is a bypass capacitor at the output of each voice that 
> will 
> fail and cause the VCO or the VCF to intermitantly fail the tune.  
> This makes sense because if the OB can't read back any frequency 
from 
> the voice it will fail. These beasts are getting on in years and 
> capacitors are usually the first thing to go in any electronic 
> device. 
> BTW I have found this to be the problem on many older synths. (Poly 
> Moog, Memory Moog etc..) 
> 
> Other times if the patch is very complicated, lots of mod 
> routings with LFO's modulating themselves etc.. then the auto 
tuning 
> may also fail. Try switching to a more generic patch or the INIT 
> patch and try again.   
> 
> Karl II
>