[sdiy] Matrix 1000 problem (one voice too bright)

[makoot at gmx.net]

Hi,
Do you maby know where to get those schematics of the matrix 1000? I'm
having problems with the memory for a long time now, he only wants to write to
patch 000.
I'm sorry but I never had your problem with it before, I wish you the best
luck on that one!

cheers,
Michiel


> Hi All. I just purchased a Matrix 1000 and it has a problem. One
> of the voices is abnormally bright. It's very obvious on patch
> #297:
> 
>   http://www.teaser.fr/~amajorel/misc/m1000bug.mp3
> 
> It occurs every sixth note, starting from the third. It sounds as
> if the cutoff frequency was stuck to the maximum. Or maybe
> something in the waveshaping. I'm not familiar enough with the CEM
> 3396 to know for sure.
> 
> I've reseated everything that could be. It's not the CEM 3396
> (tried swapping them, and the problem stays with the third voice).
> I suspect that one of the channels on one of the 4051s might be
> dead. I'll pull out the scope and dig into the schematics tonight,
> but if you have any advice or ideas, I'd love to hear them.
> 
> -- 
> André Majorel <amajorel at teaser.fr>
> http://www.teaser.fr/~amajorel/
> 

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