Connecting a guitar signal to an oscillator ?

[Krinor]

I've been playing around with this simple oscillator thingy:

http://www.oldtemecula.com/theremin/rs-opticaltheremin/rs-opticaltheremin.htm

Now I wonder if anyone has any suggestions as to where a guitar signal might be implemented into this circuit ?
Any cool ideas or suggestions ?

-Kristian

[oskar]

http://www.geocities.com/tpe123/folkurban/fuzz/uglyface.gif

Something like this is probably the easiest way to go.

skar

[Krinor]

Thanks Oskar.
Very interesting cicuits on that site by the way.