[sdiy] Midi continious controller gennerators / controler surfaces?

[Scott Juskiw]

>If you can be satisfied for non-DIY, the Evolution U-16 has 16 knobs, and
>generates MIDI out.  Each knob can be assigned to any channel and any CC
>assignment.  The assignments can be saved to memory locations (25 I think).
>
>Non-DIY price $69.95.  :)
>
>I have one I plan to do some hacking on. It looks like a fairly straight
>forward modification to turn this into a CV to MIDI CC device. :)
>

OK, so who's got a circuit that goes "the other way"? I'm in need of 
a circuit that will take MIDI out from a knob-box (like the Evolution 
U-16) and generate CVs for controlling my synth. I don't need note 
on/off or gates, just continuous controllers, maybe aftertouch too. 
16 CV outputs, at least.