Thank you for your responses, but i suppose that I should be more precise then. Lets express it this way: The principle I strive is the violin sound creation. I dont want it to be similar, i just want to make an illustration of the similarities between them in terms of the dependency of the frequency on one parameter which you change: putting the finger on a string further and closer - or changing of the capacity of an oscillator . Since we have a different system here from that of a flute (no stepwise separated keys), how could i make an oscillator which changes the frequency by changing the capacity of an oscillator? Is it hard to realize this, by lets say an antenna? So basically a oscillator with a possibility to change the frequency by an antenna.
This would be really helpful.
Alex.