Yamaha CS80

Hi!

Could be a few things:
Wave converter chip creates the saw/square
One of the filter chips
VCA that controls the filter level

Hope for the last one, since that's just one of the IG00151 VCA chips 
that are all over the CS80 - and other Yamaha synths and organs - and 
pretty easy to get.

Should be very easy to trace with a scope - or even a amplifier if 
you're low tech.  Where are you located?

  David

jesus wrote:
> Hi, group,
>
> My beautiful CS-80 has a minor issue: One of the upper-row voices seems to only have the sine wave suboscillator, but no VCO-VCF in it. This is obviously more noticeable if I silence the bottom row, and if I mix both rows equally it becomes barely perceptible, kinda' like a muffled note caused by hitting the key too slowly.
> It is a barely-noticeable "blemish", but I hate it.
>
> Anybody want to tackle this one?
> I have tried contacting Old Crow using the email from his CS80 site, but it bounces back.
>
> Hope you guys can come up with a solution.
>
> Thanks!!!
>
> JDiaz
>
>
>
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