Analogue systems

Go to AnalogueSystems.com. Then click on "Skip Intro" at the top. Then click upon 
'Modules' at the top-left. Then scroll or jump all of the way to the bottom, for there the 
video lies in wait to be ordered.

There is also a good book called (wait for it...) "Programming Synthesizers" by the chaps at 
Wizoo Books. It ships with a free software synth that has a built-in oscilloscope. Everything 
translates over to full analogue modulars, so you can skip the CD if you wish or use them 
both. It's up to you. This book guides you through pretty much everything. However, the 
software synth within is super old-school and only runs on Mac OS 9 (Classic Mode works 
under OS X) or Win 95- XP.