AW: PolyModular Standards

[Haible Juergen]

Hi Jörgen, and list,

	>If you are going to use pre-made cables, you won't get more than
four voices even with 5 pin DIN connectors. >This is because the middle pin
is always connected to the shield. The cable only has two pairs plus shield.
>So you would have to solder your own cables. In that case you could as well
use six pin DIN connectors and >get six voices. That would prevent any
mix-up with midi-cables too. Another option is to go with just four >voices.


Ah, I didn't think of that. I have seen cables with 5 wires plus shield, but
I see that this is not
always the case. Well, this gives me the excuse to go for 4 voices. There's
a lot more arguments
to go for an even number of voices, anyway. Dual / quad OTAs, rotary
switches, and so on.
For me, it's 4 voices now definitely. (With an option to upgrade to 8.)

	>You would need VCAs to control the amount of modulation. Note that
in the case of FM, this VCA will affect >the tuning of the VCOs. So it
better not have any DC offset or CV bleedthrough. Crappy two-transistor VCAs
>are out of the question.

Yes, I guess that's the one point where you need a real high quality VCA:
modulating VCOs pitch. Unless
you're only using it in sync mode ...
Eliminating offset from ENV->VCO Pitch was the reason for Oberheim to throw
out the VCA in the
OB-8 and scale the Attack and Sustain Levels in the ADSR instead.

JH.