Discussion about the Korg PolySix synthesizer group photo

Yahoo Groups archive

Discussion about the Korg PolySix synthesizer

Archive for polysix.

Index last updated: 2026-03-30 01:17 UTC

Thread

Polysix cutoff responsing very slowly

Polysix cutoff responsing very slowly

2014-03-07 by <terosantaoja@yahoo.com>

Hello!

 

Nice to be a part of the P6-community! What a lovely synth.

I have a strange problem with my p6 as the filter is responsing very slowly. Only way to alter the cutoff more faster is the EG. Basically when I'm turning the cuttoff nothing happens, or the filter opens very very slowly (even if the EG is fully open). Of course I can speed up  the response with EG, but the example the sweet resonance spot is hard to find. Is this a problem or a normal feature? I know that the cutoff is not "fixed" and its altered with the cv - as well as I have to sweep the whole spectrum before knob responses.

 

This video made by AnalogAudio1 is a good example. My cuttoff knob never responses like that:

http://www.youtube.com/watch?v=bQHExlpfuEo

 

Thank you guys!

RE: Polysix cutoff responsing very slowly

2014-03-07 by <santaojatero@yahoo.com>

Hello!
Sorry for the two different alias, something very weird happened to my second yahoo-profile. Anyhow, still the same guy here :)

Yes, I try the manual mode and there was no difference. Still the cuttoff knob will not do anything!? That's very strange as I really dont understand this. Is there anything that will point to some problems with  the control voltages or something?

RE: Polysix cutoff responsing very slowly

2014-03-08 by <josh.nursing@gmail.com>

So I'd start with the Cutoff Pot contacts at the back of the front panel circuit and test with a Voltmeter if the pot itself is wiping correctly. I believe it wipes -5V to 5V when testing the centre pad.

If that's fine, then perhaps testing the INH A B C Data lines for pulses with a Logic Probe could be interesting.

You have to make sure your main KLM-367 board isn't corroded too. Is there a new battery on it, any signs of blackened traces, dull greenish/grey solder pads?

Another easy thing to try would be to just remove connector by connector and clean them up thoroughly (both ends, both contact points), and re-seat them all firmly but carefully.

Reflowing connector pads can also be worthwhile, and it's not difficult at all.

RE: Polysix cutoff responsing very slowly

2014-03-09 by <santaojatero@yahoo.com>

Thanks for your good tips! Sadly I'm so noob with these electronical things that I have to take the P6 to repair. The main board seems to ok as the battery has changed before and I dont recognize any corroded part etc. Hmm, maybe I have to learn this so way and have a look. Altough soldering is not for me :) Very weird problem that hasn't issued before?