Polymoog schematics Needed,

[WeAreAs1 at aol.com]

In a message dated 3/31/99 8:40:01 AM, you wrote:

<<	I am looking around for polymoog schematics, Does anybody have them? 
The reason I need them is to better understand the electronics in a analogue
polyphonic synthesizer.   Thanks>>

Unless you really need to specifically understand the Polymoog, it's probably
better for you to do your research on a different type of synthesizer.  The
Polymoog is not at all representative of the typical polyphonic analog synth.
The Polymoog does share a few circuit concepts with the rest of the world of
analog synths, but it has lot more circuitry that has nothing in common with
most analog synths.

For example, it creates its basic oscillator tones not with VCO's, but via a
system that is very similar to that used in home organs - except for the very
odd inclusion of a couple of tracking phase-locked loops used to control a
couple of high frequency clocks.  These PLL's track the output of a couple of
1volt/octave monophonic VCO's that are not at all part of the audio path.
This system is something that I have not ever seen on any other synths - or
organs, for that matter.  Furthermore, the Polymoog had a huge bank of custom-
fabricated Moog IC's that had specific Polymoog-only functions.  You won't see
anything like these chips on any other synth.  Besides, the original
schematics don't really explain what's inside the chip or much about what they
do, they're basically just black boxes.

There's a lot more about the Polymoog that makes it an odd bird of the synth
family, such as their arcane "programmer" system (which is sure to have you
scratching your head), and its curious bank of preset instrument character
fixed filters.  I would respectfully suggest that you first try understanding
some of the more classic monophonic designs, such as the Minimoog, the ARP
2600 or Odyssey , or the Oberheim SEM.  If you need to understand polyphonic
analog synths better, you are urged to investigate the Prophet Five, Oberheim
OBx/OBxa/OB8, Roland Jupiter 8, or Korg Poly Six, and to a lesser degree, some
of the DCO-based synths, such as the Roland JUNO 6 and JUNO 106, and the
Oberheim Matrix 6 and 1000.  Most of these (with the exception of the JUNO's
and Matrixes) are classic analog synths in every sense of the word, and if you
get the gist of their workings, you'll pretty much be ready to understand
anything else that comes along - possibly even the Polymoog.  You can find
schematics for several of the aforementioned instruments out there on the web.

Michael Bacich