[sdiy] Ewi-CV converter

[Ian Fritz]

At 12:45 AM 7/9/05, WeAreAs1 at aol.com wrote:

>In a message dated 7/8/05 5:28:05 PM, richarnt at frisurf.no writes:
>
><< So I proudly presents my first DIY project; an interface for my Akai
>EWI-3020 to get out CV signals.
>
>Only lowly Op-amp circuits, but it works ... I have even made my first
>homepage to show it on:
>
>http://home.chello.no/~richarnt/ewi-cv.html >>
>
>Hello Richard,
>
>That looks great!  Thanks for sharing it with us.  I can't wait to try this
>with my own EWI controller, although I don't really have time for it.  Are 
>you
>really able to get an accurate 1v/octave output with just those two simple
>trimmers and a summing amp?  I thought it would be more complicated than 
>that.

It should be fine.  The EWI uses the same control voltage method as I did 
on my analog wind controllers.  I use just a single opamp for the whole 
V/Oct business!

http://home.earthlink.net/~ijfritz/st_cir1.htm

   Ian