Archive of the former Yahoo!Groups mailing list: Yamaha CS80

Someone mentioned modding the CS80 to 7 voices if you have a dead or
troublesome voice. I just had this done, courtesy of David Rogoff, our
moderator and list-owner. One of the VCO chips was misbehaving, so
David asked me if he could change the keyboard circuit to 7 voices. It
sounded like a reasonable, albeit temporary solution, but when I got
the machine home again, now the EG for the ring modulator is not
functioning. I know that this EG is monophonic, and that it was
working before the modification, so my theory is that by crippling one
of the voices, somehow we are bypassing the EG circuit for the ring
modulator. Can anyone verify this?

Put me on the list for people wanting VCO chips. I can't say that I'd
buy a whole set, depends on price, but I want to get this beast back
in shape. It's in very good condition, but has issues, so to speak.
Right now, I'm not even sure if I want to keep it, because I don't
have the tech chops to fix it myself, nor do I want to spend every
weekend humping it to a tech, spending more money on it. My back still
hurts from moving it last Saturday. If it's going to be like trying to
keep a vintage car on the road, it's going to be for sale, because I
don't have the patience for restoration or constant repairs. I don't
want to sell it as is, because someone will wind up making a profit of
about two or three grand after fixing a few things and then re-selling it.

So if I sell it, it's going to be primo, PS re-capped, new ribbon
controller, all eight voices, no issues whatsoever other than the wear
and tear on the tolex. Cosmetically, the whole keyboard and front
panel are flawless.

Anyway, I'm rambling. The point is a caveat and a question: does
setting the keyboard to use just 7 voices affect the EG for the ringmod?