Discussion about the Korg PolySix synthesizer group photo

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Discussion about the Korg PolySix synthesizer

Index last updated: 2026-04-28 23:40 UTC

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Re: How long does a tuning last?

2008-09-18 by Andrew Jury

Hi,

Can you tell the panel of esteemed experts here whether your P6 is 
uniformly out of tune or are there regions of the keyboard which are 
worse than other?

As CJP says these old analogue circuit are prone to drift when the 
tollerances of the components start to change over time. If the tuning 
knob is hard over to either the left or right this certianly is well 
out of the original design parameters. There are special procedures 
outlined in the service documentation for recalibrating the P6. Also 
there are articals ad infinitum in this group which mention tuning 
faults which can occur to the opto-coupled feedback arrangement on the 
key assigner board.

Cheers,
Andy


--- In PolySix@yahoogroups.com, "goxflee" <goxflee@...> wrote:
>
> I tuned my Polysix about 5 years ago. The other night, trying to tune
> up to a melodica, which is in correct tuning, I had to turn the tuning
> knob all the way to the left and even turn the pitch wheel up a bit to
> get it in standard tuning. Is this to be expected, do I simply have to
> get in there again and fiddle with the internal tuning posts or do I
> have a bigger problem? Thanks for the input!
>

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