MOTM

Tony writes:

>>Don't you just want a big cap? Something like 1uF non polar may do the trick. 
Shove it inside a jack plug in series with the CV line. A bit crude but it may 
just work....<<

That's such a simple solution I don't know why I didn't think of it. I'll give 
something like that a try and see if it works. Thanks for the other comments 
too. Now that people are refering to it as a differentiator, I'm sure I have 
one or more schematics in some books for such a thing just incase the above 
doesn't work out.

-Elhardt