Discussion about the Korg PolySix synthesizer group photo

Yahoo Groups archive

Discussion about the Korg PolySix synthesizer

Index last updated: 2026-04-05 20:27 UTC

Message

Re: front panel and ring mod-ish weirdness

2012-08-12 by tonezone020

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
>

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.