At any given moment, I have at least four synthesis/audio books sitting on my desk for quick reference. Sometimes up to eleven. However, there are only a handful of websites I consider to be true tomes of synthesis knowledge. One of these is Sound On Sound’s Synth Secrets.
Here is a sample of topics you will find there:
Sample and Hold
and much more…
US Patent 3,475,623:
Electronic High-pass and Low-pass Filters Employing the Base-to-Emitter Resistance of Bipolar Transistors
“I have been collecting copies of Moog patents, those invented by Robert Moog and as well as those assigned to Moog Music, Inc., and the synthesizer-related patents of Norlin Music, Inc., the company that purchased Moog Music. I present them here along with some hopefully entertaining commentary.”