Re: [AH] Duophony from two CV inputs

From Mark Pulver
Sent Tue, Jan 15th 2008, 00:04

 >"I don't want to just hook up the keyboard to two oscs and the
 >doepfer on the other osc."

So, you do _not_ want this, right?

   MS-20 --+-> VCO 1 CV1
           |
           +-> VCO 2 CV1

   Ribbon ---> VCO 2 CV2


Then I think the answer is here:
   http://www.doepfer.de/a150.htm

   MS-20 --+-> VCO 1 CV1
           |
           +-> A150(1) --+
                         |--> VCO2 CV1
   RBN CV ---> A150(2) --+
   RBN GATE -> A150(CV)

Basically you're using the voltage from the GATE of the ribbon controller 
to select between either the MS-20 or Ribbon CV controlling VCO2.

If the GATE is off, then you'll get the MS-20. If the gate is ON then 
you'll get the Ribbon.

Mark
---------
Date: Mon, 14 Jan 2008 12:35:20 -0500
From: tim@boyscoutrecordings.com
 >
 > Hello.
 >
 > I want to emulate the duophony of my old EML 100 (where a new
 > note will steal one of the oscs then give it back when you release
 > the key) with two CV sources. I have a Korg MS20 + MS02 providing
 > one CV source and a Doepfer ribbon controller providing the other.
 > Is there some kind of (probably logic based) module I can use to
 > generate duophony ? I don't want to just hook up the keyboard to
 > two oscs and the doepfer on the other osc. I may have to go
 > down the MIDI keyboard + MOTM 650 route which wouldn't be a
 > disaster but I'm interested to know if there's another way.