Hello Polysix tuning society! I recently bought mine (OLD version with KLM396A) and it came detuned. Difference between voices on a same note was almost a semitone, octaves were compressed over the 5 octaves by a couple of semitones. So I Googled and studied... like this:
http://www.oldcrows.net/~oldcrow/synth/ ... iserv.html
https://groups.yahoo.com/neo/groups/Pol ... opics/1604
http://www.vintagesynth.com/forum/viewt ... =5&t=33592
I also checked the optocoupler mythology according to this:
http://s188.photobucket.com/user/minebi ... 1.png.html
But apparently you cannot be sure:
Anyway, I assumed the optocoupler is ok and plunged into tuning. The results are not good. There is much less difference between voices, that is almost fixed. However, the octave stretching is terrible. Now it is compressed much more.
All in all, I was tweaking these trims:
- On the KLM396A: VR1
- On the KLM366: VR1 and VR3
- On the KLM366, for each voice: VR10 and VR11
That is all I touched. Missed anything?
It was not clear to me why should I move SW1 to "stretch" position because there is nothing to do except to "confirm" something (according to the manual, step 10). The catch must be somewhere there, as what does it mean to "confirm"? To adjust perhaps? With what? By tweaking which pot?
For me it is also confusing that there are two VR1's in play, both are described as "TUNE MID" here:
http://www.sequencer.de/synthesizer/vie ... hp?t=82149
So there are 2 global TUNE MID controls, one TUNE LOW, and no global TUNE HIGH. Confusing.
Anyway, the question is simple: how do I stretch the octaves globally before I go to individual voices? Can anyone write a good instruction? Or give me a hint and if I ever succeed, I promise to write a really good one.