This is an interactive, educational PDF that explores adding additional pitches to your signal. This can be in the form of octaves, fixed intervals, or even complex harmonies. This PDF with take an in depth look at Octavers, Pitch Shifters, and Harmonizers to help you familiarize yourself with the differences and similarities between them and help you decide which pedal is right for you! Click on the links throughout this book to access audio clips that include over 100 examples to accompany your reading.