Analogue systems

I agree totaly with Peter when he says that understanding these principles
is essential, but I think that some examples can help.
A great source of information is, full of examples is :
  http://www.korganalogue.net/korgms/manuals/ms50/5001.html

You'll find a lot of diagram that will help you to understand main
principles of sound synthesis.
Regards,


Arnauld