Hello, I would like to add cv inputs to my Syncussion DRM1 on few sound's pitch pots.   
I found about http://www.bridechamber.com/VC_Res_PCB.html 
And here http://www.midibox.org/dokuwiki/doku.php?id=midiboxfx_-_midifiying_analog_gear#analogvoltage_controlled_resistors is some more informations about modifying pots into cvs.  
There, the "OTA" and the "Resistor ladder network" options looks good but I can't just do it with my actual knowledges. Also there is not really much informations about the resistor ladder network.  
I like to diy kits but have no "deep understanding" in general electronics.    
Could anybody help me with this ?