Advanced Techniques for Programming Modular Synthesizers

While the site is ten years old, it wasn't until Reaktorplayer's Tweet that I had seen this.  James J. Clark made this thorough programming guide with the Nord Modular in mind, but the techniques he outlines can be applied to a whole ton of synthesizers, hardware and software.  If you're looking for a beginner's guide on how to program a synth, this probably isn't for you.  Instead, Clark's guide covers more advanced synthesis techniques such as audio rate modulation, using filters in parallel and series, different types of noise, etc.  Of course if you DO have a Nord Modular, he provides numerous example patches to illustrate the concepts he is talking about.