I'd take note of what Kent said - "Logic whine" - or did you miss his post?
Cheers,
TOM
--- In yamahacs80@yahoogroups.com, "pyjamagroove" <pyjamagroove@...> wrote:
>
> Well, I´m pretty sure it´s not a voice card as it comes from all the voices. It must be a general problem. It leaks noise, some VCO signal and that high annoying tone that comes when the general brilliance is closed. It´s quite annoying cause it gets through the low base sounds hissing in the background....Could it be the PRA board?
>
> --- In yamahacs80@yahoogroups.com, The Old Crow <oldcrow@> wrote:
> >
> > CS filters cannot self-oscillate; they are wired with external
> > feedback limiting on the resonance control VCAs inside the IG00156s.
> > You might be hearing chorus unit clock noise. Or a noisy FET somewhere
> > leaking a VCO signal. My CS80s are noisy in this regard, probably due to
> > age more than anything. --Crow
> >
> > On 5/23/2013 3:14 PM, pyjamagroove wrote:
> > > If I go to the panel mode (both channels) and turn all VCOS, noise and sine off, both VCF up -then I put overall brilliance and keyboard control brilliance up and press like 6 or more keys at the same time, I hear high sine sound and actually a little VCO in the background and some noise clipping while pressing those keys. I´ve noticed this playing presets like brass with all the brilliance up. Do you guys have the same effect or there is something wrong with my CS80?
> >
>