[sdiy] grant's 'CV twister'

[mark scetta]

thanks grant for the CV twister, which i have personally renamed 'variable 
full wave rectifier' ...very cool and simple circuit.  for our home viewers 
playing along, it's at 
http://www.musicsynthesizer.com/DIY/Grant/CVtwister2.html

can anyone tell me if it's possible to add CV ins to the 'upper' 'mid' and 
'lower' pots (i mean, make them voltage controllable) ?

cheers
mark