I was asking the same question today...

AFAIK for a VERY BASIC Poly Patch you will need at least 1VCO,
1Filter, 1ADSR (common for VCA and filter) , 1VCA FOR EACH VOICE you
want to play. (but this would make a really thin sound, of course,
more VCO the beter)

Furthermore, You'll need a MIDI-CV Interface capable of sending two
different CV singals to the different VCOs and GATES to the Different
VCAs (Doepfer MCV24, the Keyobard for the old Roland System 100 and
was told also the old Roland MPU should do the trick. Dunno what else
works)

In the end, getting a modular to polyphony it's a great expense and
waste of time patching cables ;-). But I'm waiting for a MCV24 to
test it with My 8VCOs...

--- In Doepfer_a100@yahoogroups.com , "stulama" <Stulama@a...> wrote:
>
> Hi all
> After posting my wishes for new modules, I got a reply from NUTAFX
saying... "you can
> play your Doepfer polyphonically with the mcv24 & it looks like the
touch keyboard will
> also do this.
> Also..A-143-x quad modules could make poly patching a dream.
>
> Can anyone elaborate further for me How many Oscillators would I
need One for each
> note of the chord (I have 2 A-110s and 1 A-111) Or could I play 4
notes or more using
> one oscillator , Then stacking
> waveforms .That would be my dream.
>
> After looking further I found that Analogue systems make the RS370
> Polyphonic harmonic generator. Is this what I am looking for I
wonder
>
> STUART