Discussion about the Korg PolySix synthesizer

Thanks Johannes. I have changed the PC-1 unit, as well as looked at 
all the outputs from it and all the other pots as well, and they seem 
to be within acceptance. I shall give it one more try, but this time 
borrow a proper tuner (i used a VST plug before). But it looks as if 
I have done excactly what you described. I was very careful about the 
Stretch tuning switch, so I know I at least flicked that. 
I know it's not supposed to be perfect, but as I've said earlier the 
pitch was off quite a lot. If I played C3 and C4, it sounded ok, but 
if I plyed C3 and C5 (for instance) the upper C would be a Flat E. So 
it does work if your only playing a single chord i the mid range, but 
if you wnna play some bass as well (or hi notes) they are off the 
chart so to speak.
But like I said, I'll give it one more try. 
Thanks again for your patience and time...
/ Monke


--- In PolySix@yahoogroups.com, Johannes Hausensteiner <johau@...> 
wrote:
>
> 
> The tuning procedure in the service manual is written from a 
technical
> point of view, which is OK because it was made by engineers for a 
piece
> of electronics equipment. The user however views devices most often
> different than the engineers had thought. So, if you want to "tune"
> the Polysix as an musical instrument you should not rely on the
> "adjustment" procedure but on your ears ;-
> This was the prolog, now to the matter:
> 1.) Make sure you dont attempt to tune while in strechted tuning 
mode:
>    SW1 on KLM-366 in "back" position (=away from CN12) is normal 
tuning.
> 2.) Set tuning control knob on control panel to middle position
> 3.) Set common pitch potis (VR1 ADJ CENTER, VR2 TUNE HIGH, VR3 TUNE 
LOW,
>    VR14 D#4-E4 ADJ, VR15 TUNE MID) on KLM-366 to a center position.
> 4.) Set tuning potis (VR10 TUNE LOW, VR11 TUNE HIGH) of one voice 
(e.g.
>    UNIT0) to center position.
> 5.) Now start to tune UNIT0. Take the adjustment procedure as a hint
>    of what will happen when you turn certain potis. Use a standard
>    chromatic tuner.
> 6.) If UNIT0 is tuned to your satisfaction, TUNE THE OTHER VOICES
>    (UNIT1 .. UNIT5) TO UNIT0. Use the effect of beating, which is 
best
>    heard with a square wave tone.
>    Note that it never will be perfect in all octaves! There is 6
>    independent VCOs in the Polysix; they never will be 100% in tune
>    over the whole range! After all, nowadays this is a main feature
>    of a truly analog instrument; thats what we are after ...
> 7.) When all six voices are tuned satisfactory switch SW1 to 
strechted
>    tuning position (i.e. towards CN12) crank up the volume of your
>    amp or P.A., play spread, six-voice chord and get lost in the 
beating
>    moving sound!
> 
> If you cannot get one single voice in tune there is a fault on the
> KLM-366 board. Sometimes the opto-coupler labeled "PC-1" is the 
reason.
> Search the archives of this mailing list for how to get a 
replacement.
> 
> Good luck!
> 
> Johannes
> 
> BTW. search the archives for "SW1" to see other posts to this topic,
>    and, of course, "tuning" ...
> 
> 
> bildfantomen wrote:
> > This seems to be a popular topic, but once again: I Can't get the 
> > F***R to "tune". Ive done and redone the procedures in the 
Service 
> > manual, but it still only is in tune about one and a half octave 
in 
> > the middle. I would like to know if anyone has any hints on how 
to 
> > make this LOOONG episode shorter. As it is now all it does is lay 
> > there beautiful and entizing, but all I can use it for is Noice 
> > basically...
> > 
> > I've Changed the opto and the battery and all is well, no pots 
are 
> > defunkt. What to do, it to cool to just be a coffey-table...
> > 
> > / Monke
> > 
> > 
> > 
> > PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6 
> > Yahoo! Groups Links
> > 
> > 
> > 
> >
>