[sdiy] Turn anything into a ribbon controller / theremin / etc - Drawdio

[cheater00 .]

Hi guys,
only noticed a small note about this from 4 years back, so I thought
I'd bring this up. I wonder if it could be turned into a CV source?
This item is called "drawdio" and it apparently can use resistance
changes that even come from graphite, or leather surface, to detect
what pitch you want. Great idea if you ask me.

http://www.youtube.com/watch?v=PV_w38ldZaE