Discussion about the Korg PolySix synthesizer

Tony Allgood wrote:
> 
> Just a quick note to say 'hi' and introduce myself.

Hi Tony and welcome...
Note that this is low volume list (hoping to go up)...


> I have modded mine slightly already, and I hope to do a few more. But
> the first thing I did was to change all the LEDs to different colours.
> OK OK, its not really totally necesary, but by heck it looks good in the
> dark. :-) I used Robin Whittle's TB303/Devilfish site to give me some
> ideas on LED colours.
> 

That's neat idea, as P6 has lots of nice blining lights.
You could add some for envelopes and for all the lfos (mg and arp have,
ensemble and pwm missing).

> I am going to add midi soon too, as well as a Unison detune knob. To do
> the latter I would like a polysix knob (of either shade), so if anyone
> has one, I'd be interested.

What midi you plan to use? Unless you have modified your own, I guess
you'll go for some comercial one. There are 3 DIY ones available,
one Old Crow's mpx61 with lotsa 4066s, Ricard Wolfs advance one
(wich got into serial production with iotech), wich is superior
with performance but uses number of dated devices and I just don't
have time layout my own PCB based on Ricards online plans. Last
one is simple pic one from BOjan Burkeljc, with just note on/off,
but still very useable and I plan to use this one.

Unison detune know sounds interesting. How do you plan to use
just one knob for detune of all voices? There's mux inside
that in unison mode switches different resistors and voltages
for each voice to set some predefined detune. This is my next
mod I've planed, to install 6 small trimpots with some shafts
in that small area of wheel board facing to you. Just simple
voltage didviders instead fixed resistors. This way I could
detune for each voice (wow, 6VCO monster :). Only problem
I'm not sure would I make it detune +/- few cents or +/-
few octaves (it needs 0.5V per octave).

You could make your P6 master CV kbd. You just need one
dual opamp to amplify 2X CV after the DAC and take gate
from unison gate.


cheers,


marjan