Further to my original question, I didn't quite have my thinking cap on when
I sent the last question, what I was actually referring to were the various
techniques of Physical modelling, Anologue modelling and computer generated
speech where the are such an amount of paramaters one can control as to give
a "virtual instrument". They employ modelling of the actual processes that
go on inside an instrument rather than just trying to give a straight
synthesis of the sound produced. I am sorry if I did not quite define what I
meant in the original question but any help on this would be most gratefully
received.
                         Thanks,
                             Dan.