Discussion about the Korg PolySix synthesizer

--- In PolySix@yahoogroups.com, "Andrew Jury" <andy@...> wrote:
>
> Hi,
> 
> This sounds like another job that might require access to an 
> oscilloscope! What might be an idea is to generate a single known 
> waveform (i.e. a saw at A440) on one voice and then, starting at 
the 
> output (the hot end of VR1 on the KLM369) work back through the 
> signal path until you reach the voice mixer (which is the output 
from 
> op-amp IC10) So:
> 
> KLM369 CN15/3 -> KLM368 CN14/1, KLM366 CN14/1
> 
> Then compare the waveforms at each waypoint. My feeling here is 
that 
> you might find the signal is getting affected by the circuitry on 
the 
> effects boards. Yes, of course, but not in a way we want. Does the 
> nature of the sound change as you operate the effect type and 
> intensity at all?
> 
> Cheers,
> Andy
> 
> --- In PolySix@yahoogroups.com, "wasteking1" <wasteking1@> wrote:
> >
> > im still fooling with my '367-fixed' polysix and it seems that 
when 
> i 
> > play multiple notes simultaneously, the background hiss/white 
noise 
> > increases as if it is amplified with each sucessive added voice 
as 
> > notes are added to a chord  . some sounds hide it, but its 
> noticeable 
> > on many patches.  I know i have this noisy pulsing VCA on the MG 
> > section that i posted about before, and was told to check out 
> around IC 
> > 20/21 on the 387.  While this other white noise doesnt pulse , it 
> is 
> > similar in tonal quality . The results of this is that the 
polysix 
> just 
> > sounds 'dirty', and seems not right. could they be related?
> >
>

It seems that the nature of the  "additive' white noise generaly 
stays the same, but on some patches it seems that it is a bit 
diffrentin pitch  when i play  bass notes rather than   high pitched 
ones.And  still, some patches seem fine.  When i hear the noise i can 
increase its intensity with the attenuator.  If the sound has the MG 
set on VCA (or i switch it to VCA) i then get  the white noise 
pulsing in the background , even when NO notes are played. (that is 
the most annoying, because there should be silence. ) this is subtle, 
but clearly there and not subtle when it pulses. The MG frequency and 
level controls DO affect the pulsing white noise.