I plan to turn this section of the website into a very thorough course on synthesis and sound design, but I need to finish the previous guides (composition and mixing) first. If you are eager to learn sound design right now, I highly recommend trying out Syntorial. It's an interactive tutorial that teaches you synthesis by playing a sound and having you create a match for that sound. You do this by setting the parameters of a simple, but progressively more complex synthesizer. Click here to learn more!