http://dl.dropbox.com/u/1822991/The%2BCookbook.pdf
There are a couple of links to sites where you can download the pdf of Nicholas Boscorelli’s “The Stompbox Cookbook”. Just a year or so ago this book was selling for hundreds second hand and it’s out of print so no one could access all the info inside without shelling out the $$$. Now thanks to a few generous people it’s free for everyone to see. There are some interesting projects in there, nothing too revolutionary but it certainly worth a read. The section on envelope detection and control is quite interesting and it’s got really in depth descriptions of most aspects of common stompbox circuits – perfect for a beginner or someone more advanced.