Weird behaviour.

[tomg]

> I just finished a VCO. Now this happens; when i
> connect my CV keyboard (from tomg's EFM page, one
> switch per key), the CV goes a little crazy (from -10V
> to 8V and in between). Should it be buffered? Or is
> this buffering normally done by the log-int convertor?
> I haven't build one yet, didn't find a schematic in
> tomg's cookbook... 
> (I do need one, don't I???)
> 
> thanks
> smile
> roel

The kbd-interface is buffered. If you have it set up 0-3.99V
(4 oct) and one octave = 1V, you shouldn't have any 
problems. By this I mean connect your meter to the kbd 
output and press the first key (might be A might be C) does 
it  = 0V? Is an octave up = to 1V, 2-oct = 2V...ect. without
being connected to your VCO. If it is, the problem is not 
your keyboard.

-tg