What about a polysix that takes... 5 mins for just a SINGLE voice to be in tune (the other 5 are in tune as soon as you switch it on)? Obviously it's IN tune as it ends up in tune, but the fact it's only ONE voice (always the same one!) that has a delay 'warming up' does it hint a fault with one of it's chips or caps? if so I'd like to fix it.
thanks
To:
PolySix@yahoogroups.comFrom:
johau@gmx.netDate: Tue, 22 Sep 2009 21:43:41 +0200
Subject: Re: [PolySix] out of tune?
How do you come along?
Here is what happens (should happen):
1) set the front panel Tune knob to center position
2) on KLM-366: set sliding switch to "normal" position (away from CN12)
Be sure to have selected POLY Key assign mode
3) set potis VR10 (Tune Low) and VR11 (Tune High) of UNIT0
to center position
4) tune UNIT0 (you can recognise which voice (or UNIT as they call it)
is active by the small LED on KLM-366) in low, mid, and high range by
poti VR2 (high), VR3 (low), VR15 (mid), and VR14 ("D# ADJ"). VR14
does have very little impact. When tuning low notes switch the
OCTAVE setting on the front panel to 16', when tuning high note set
it to 4'. Use a chromatic tuner.
5) once you are satisfied with UNIT0 (it will NOT be 100%!) proceed to
UNIT 1. Dont touch the common potis VR2, VR3, VR14, and VR15; just
VR10 and VR11 of each UNIT. Do not use the tuner for that but rather
tune it to UNIT0, observing the effect of tone beating. You have to
play UNIT0 and the UNIT you want to tune.
6) If you are through with all 6 UNITs set up a "chord" of six equal
notes using the HOLD mode and press CHORD MEMORY. Now play notes
over the whole range (low 16' .. high 4') and listen. All 6 voices
sound simultaneously. But in contrast to UNISON mode the voices are
not detuned but "equal". Still they will not be equal 100% over the
whole range. It is 6 independent oscillators with true analog
circuitry, which will not be 100% perfect.
If you are satisfied with the precision set SW1 to the "Stretch
Tuning" position (towards CN12). Now the tuning is set intentionally
off a few cent over the whole range, you can check this with the
tuner. This adds richness to the sound as the 6 voices start (even
more) beating.
I hope this helps.
Johannes
blindcatfishwillie wrote:
> Hi,
> I've searched all I can on this great forum but I still can't figure out how to get by polysix back in tune. Andrew did a spectacular job restoring the CPU board but now I need to give attention to the tuning board. I have the service document but can't make much sense of it. It seems too many things are out of spec to make it work. There is a post from Johannes stating:
>
> "5.) Now start to tune UNIT0. Take the adjustment procedure as a hint
> of what will happen when you turn certain potis"
>
> I just can't figure out what pots to turn to make what happen. The problem (and I should have stated this earlier) is that an octave in sound stretches more than an octave worth of keys.
>
> Thanks for any guidance or offers of help!
>
> Jesse Olley
>
>
>
> ------------------------------------
>
> PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6Yahoo! Groups Links
>
>
>
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