Discussion about the Korg PolySix synthesizer

Hi Paul,

  I watched your vid and it seems like your ADSR Env. is working properly. If you want the patch to sound immediately upon pressing a key, you want the attack set at 0. If you want the note to sound continuously while pressing a key, you want the sustain at max. Generally, if you have the decay and sustain all the way down you're not going to get much more that a short click. If you want the note to continue after letting off a key, turn the release up. If you want to reset a knob from a preset patch, crank it all the way max and then back to zero-then experiment where you want it set. Yes, the EG Intensity and the filter cutoff are intertwined. Check the manual under EG Intensity. Hope this helps. Enjoy!

regards,

dizz

--- In PolySix@yahoogroups.com, "Paul" <pchorostecki@...> wrote:
>
> Ive gotten the video up on youtube:
> 
> http://www.youtube.com/watch?v=nYR7aOycOQ8
> 
> 
> --- In PolySix@yahoogroups.com, "Paul" <pchorostecki@> wrote:
> >
> > Thanks for the quick replies!
> > 
> > After reading the manual I got more insight as to how tweaking works for this synth. I found out that while tweaking knobs it takes extreme movements to over-right the original settings on a patch. 
> > 
> > With this in mind I started to play with the ADSR and it seems that they are actually working quite well. The attack and decay may need  a tweak as the range in which they work in seems a little off. It seems like between 0-4 it does little to the sound then between 4-7 it changes dramatically and then past 7 it dies off again. Not sure if thats how its supposed to be, Ill have the video ready in a little bit to show what I mean. The Sustain and Release seem to work fine after using the method mentioned in the manual to reset their state.
> > 
> > Also, I did the voltage test on IC7, its funny because as I was doing it the EG started to work. It does read from -5 to +5 on pin one. As I was doing the test I noticed that it was changing the sound. I looked more into it and I guess I just didnt play with it enough because the cutoff setting seems to determine how well this knob works. Once I moved the cutoff around the EG started to make a bigger difference. 
> > 
> > So I guess this problem was just me not knowing the basic function of this synth. 
> > 
> > I did record a video of me tweaking the ADSR and EG, Ill get that edited and posted later tonight.
> > 
> > Thanks again! 
> > 
> > --- In PolySix@yahoogroups.com, "Andrew Jury" <andy@> wrote:
> > >
> > > Hi Paul,
> > > 
> > >  
> > > 
> > > Before you do anything else make sure that pin 1 of IC7 swings between -5v
> > > and  +5v (or thereabouts) as you turn the EG knob clockwise.
> > > 
> > >  
> > > 
> > > Cheers,
> > > 
> > > Andy
> > > 
> > >  
> > > 
> > > From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
> > > Paul
> > > Sent: 11 November 2009 00:02
> > > To: PolySix@yahoogroups.com
> > > Subject: [PolySix] A few questions about my new Poly-six
> > > 
> > >  
> > > 
> > >   
> > > 
> > > Hello,
> > > 
> > > I have recently acquired a Korg Polysix and am now in the process of fixing
> > > it up.
> > > 
> > > Luckily the battery problem was already done by the previous owner, all the
> > > broken traces were replaced with wires and a new battery was fitted.
> > > 
> > > The synth plays alright, I already took apart the key contacts and cleaned
> > > them but will have to go back and do it again because a few keys still dont
> > > work all the time. 
> > > 
> > > I also have to replace 13 of the 19 push buttons for patches and tape
> > > memory, I have already ordered those.
> > > 
> > > My question is about calibration. Ive tuned a much simpler Roland JX-8P in
> > > the past, which only had a few very simple variable resistors and took a few
> > > minutes. Ive Looked over the calibration procedure for this synth and it
> > > seems much harder. 
> > > 
> > > The reason I want to do the calibration in the first place is because Ive
> > > noticed that a few of the functions on the synth dont work correctly. 
> > > 
> > > The EG intensity knob doesnt change the sound at all, while all 4 EG knobs
> > > (ADSR) work in a way that I believe is wrong. I was going to describe it
> > > here but gave up as they just seem really random. I think the best way for
> > > me to describe them would be to make a video, which I will do later. 
> > > 
> > > Ive tested all the 10k pots on that board with a multimeter and they seems
> > > to all function the same: They start at 1.09k when they are all the way to
> > > one end and move up to about 2.9k somewhere in the middle and then back down
> > > to 0 on the other side of rotation. 
> > > 
> > > I should also mention that ive loaded a bank of stock presets and they dont
> > > seem to function correct either. I had to turn the ADSR knobs to random
> > > positions it seems to get any sound out of the few patches I tried.
> > > 
> > > I did notice that there are adjustments listed for all the different EG
> > > functions in the instructions. Could I just skip to those tests or should I
> > > follow the full guide step by step?
> > > 
> > > I have a multimeter and a PC oscilloscope. Ive also made the 56k Ohm jumper
> > > that is talked about in the calibration instructions.
> > > 
> > > Ill make a video of the problem and post it on youtube later tonight or
> > > tomorrow. 
> > > 
> > > Any help would be much appreciated!
> > > 
> > > 
> > > 
> > > 
> > > 
> > > [Non-text portions of this message have been removed]
> > >
> >
>