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

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Subject: Re: front panel and ring mod-ish weirdness

From: "tonezone020" <swamp.gigs@googlemail.com>
Date: 2012-08-12

Hi,

If you set the Delay and Level to zero does the ring mod change ?

Btw, I'm in London, where are you based ?

Regards,
Tony

--- In PolySix@yahoogroups.com, Eric Frampton <eric@...> wrote:
>
> Hi all -
>
> I've just finished doing the standard battery damage control on my PolySix, but some weird things are happening. On this machine, it was far enough gone that I had to replace both IC30 and IC31, and do a fair amount of point-to-point wiring underneath. That said, I'm still seeing some misbehavior.
>
> First off, the entire front panel oscillator section is non-responsive to knob movement, including the Sub Osc switch.
>
> Also, the MG Mod destination is routed to VCF, no matter how that switch is selected.
>
> Next, I've noticed a weird ring mod-sounding modulation on the very end of the release stage of any notes. As best I can figure, it's the filter, not the VCA, that's being modulated at high frequency, as playing with filter cutoff/key amt/env amt changes the amount of this modulation. It's definitely not the LFO bleeding through anywhere - LFO speed has no effect on this audio-rate mod I'm hearing.
>
> Everything else seems to be working fine.
>
> Probing the A/B/C inputs of the 4051's and pin 5 of the 4042's in the KLM-367 board, I'm seeing no signal on P20 and a weak signal on P21 at the 4051's, and no signal at P24 on that set of 4042's (P25 on the other set is fine). I understand just enough to have gotten that far, but am not sure where to take it from here.
>
> So I submit my weird P6's behavior to the pro's - any thoughts?
>
> Thanks,
> Eric
>