Discussion about the Korg PolySix synthesizer group photo

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Discussion about the Korg PolySix synthesizer

Index last updated: 2026-03-31 18:47 UTC

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Re: More photocoupler info

2013-08-21 by chipaudette

That's a *great* link. I particularly like the basic discussion of how the auto-tuning system works in the Polysix. Outstanding.

Chip

--- In PolySix@yahoogroups.com, "Donald Backshall" <backshall1@...> wrote:
>
> Take a look at this blog by Stefan Huebner. He took some measurements with an old P1501 and a couple of Vactrol parts and made a nice chart showing response curves. His conclusion: The VTL5C9 is a much closer match to the old P1501 than any of the parts we have been trying.
> http://huebnerie.de/blog/?p=318
>
> Don Backshall
>

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