In this book the tools of spectral analysis are applied via graphics to musical sounds, especially those coming from a piano, with emphasis on the visualization of musical sounds rather than the mathematics behind it. The aim is to give a different and insightful view of musical instruments. I recommend this remarkable book to everyone who wants to know how sounds are generated and how they can be analyzed. I am sure that this book will serve as a standard reference for the spectral analysis of musical sounds over many years