200e

I don't have an 250e but I have externally sequenced an AKS.

I never hear of anyone interfacing 200e and EML stuff :-)
(amusing I'm sure for those that have struggled with interfacing it's  
already 1.2v/oct gear but back to the topic...)

What you have do depends on to what degree your synthi has been  
modified.

 From stock you have no gate input. You could bring one out to a new  
jack or one of the less used existing jacks up top with a well known  
mod or you can get one of those strange multipin keyboard connectors  
and break that out to separate plugs. My Synthi had the former  
already done to it but I'm now using the later. Ebay user  
Synthidreams occasionally has breakout connectors with trimmers as a  
"buy it now" on ebay but not all the time or in large numbers. If you  
can get the male keyboard connector plug it's not that big a deal to  
build one.  I think it's expecting 5v so I'd be a bit careful before  
you send it the 10v trigger.

For the CV, some people have a 1v/oct mod done, which isn't ideal for  
the Buchla though it is closer than stock. Not really necessary here  
though. You can send the CV in through an external input jack then  
there is an input level knob you can use to lower the level until it  
tracks to your CV. Now that I have a breakout cable for the keyboard  
input connector mentioned above, I can just adjust the little trimmer  
attached to the cable to get the CV scaled.

The trick to scaling to someone who hasn't done it is to keep  
adjusting to an octave of CV gives you an ocatve of pitch. You can  
ignore what the pitch is exactly. Once you have an octave you just  
adjust the knob on
the osc to be the right pitch.


Nick