Archive of the former Yahoo!Groups mailing list: Discussion about the Korg PolySix synthesizer

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Subject: Re: [PolySix] Re: Voice board calibration

From: Bob Grieb <bobgrieb@yahoo.com>
Date: 2014-11-24

If you have KLM-396, VR1 on that board is equivalent to
VR15 on the KLM-366 newer board.

If you don't have VR2, then you don't need to set it in the middle
or adjust it.   The procedure for setting up the anti-log should be
the same, I think.

Each voice has its own tuning low and high adjustment,
but the anti-log is shared by all of the voices.   So I am not sure
how you would set it by ear.   Sine it converts from a linear voltage
to a logarithmic one, using a meter seems to me the easiest way
to adjust it.  Of course, the best course is to leave the anti-log alone
unless someone else has already messed with it.

But maybe someone else has a better way.

I do not.

    Bob Grieb

From: "andrijapusic@yahoo.com [PolySix]" <PolySix@yahoogroups.com>
To: PolySix@yahoogroups.com
Sent: Sunday, November 23, 2014 3:58 PM
Subject: [PolySix] Re: Voice board calibration

 
A couple of questions, regarding the instructions in TUNINGPROC.TXT. It is under Files, Mods&Repair folder:

- I have OLD version, no VR2, no VR15. How should I interpret instructions? 

- In the step 14) there is a "trimmer". Which trimmer? (The same mystery is in the original Korg Repair Manual. There they are talking about "confirming"... not clear at all.)

- I am using another, very precise digital synth as my tuning reference. By listening to beats, I can be very accurate. This instruction requires precise voltmeter and voltage calculations. Is it not much simpler to use ear instead of voltmeter? Can anyone suggest tuning procedure by ear? Or at least by a good guitar tuner? 

Thanx!