Korg Poly800/EX800 Users

Yes, you could mix them but it wouldn't do anything much at all. Let me 
explain...

The biggest drawback of the Poly-800 design was the tone generator. The MSM5232 
was produced to be used in arcade games and it was used in many, many of them 
too!

So Korg took the MSM5232 and put it into the Poly-800 because they were trying 
to build a low cost synth. They certainly achieved that but in doing so, they 
left the Poly-800 with a very primitive oscillator source. The MSM5232 produces 
pure square wave output. IC4 and IC5 section provides a way to produce a 
slightly, kind of, sort of triangle wave shape by attenuating the four octave 
sources.

Mixing them is not going to achieve anything in my opinion. I hate to disappoint 
you but the MSM5232 waveform generation is THAT primitive.

That's why my focus now (and it's a rather fuzzy focus given my other 
commitments) is on altering the DCO2 clock so that it is far more independent of 
DCO1 (giving us far better phasing). And, I am also thinking about providing a 
kit to completely replace the original TG with a new one so that all eight DCO's 
are fully independent of each other and so that they can produce a far wider 
variety of wave forms (perhaps using a waveform ROM like the DW-8000). But that 
is all just a bit of a wish list right now.

It's actually interesting how a global economic slow down has real effects on 
projects like these (which I consider to be "cultural"). So as economic 
considerations become major to individuals (including me), time on "cultural" 
projects, hobbies etc is pressured or crimped.

But hopefully, I will be able to get the HAWK arpeggiator done this year!

Mike





________________________________
From: 7yash <josh.nursing@...>
To: korgpolyex@yahoogroups.com
Sent: Wed, July 20, 2011 8:58:53 PM
Subject: [korgpolyex] Re: External Audio in Mod.

  
Hmmm, interesting. Do you think they are mixable with the original DCOx signal 
without detriment?

--- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@...> wrote:
>
> Those two chips come after the tone generator.
> 
> They take the square wave outputs of the TG (16,8,4,2) and buffer them and also 
>
> provide the quasi triangle wave (by attenuating the higher foots more).
> 
> This gives four outputs. Two for each DCO. One is square the other triangle for 
>
> each DCO.