Ongaku no Tomo Sha: Analog Illustrated Guide to the FM Sound Source Synthesizer DX7 - A Thorough Study by Hiroshi Suzuki This book thoroughly analyzes and explains the Yamaha DX7, which became a bestseller. It's an excellent book for understanding FM sound sources. It meticulously analyzes the sound data of each tone based on the DX7's factory presets. With over 300 pages of detailed descriptions, you'll learn the secrets of sound creation. There are no writings or missing pages, and it's in generally good condition with some minor mold and yellowing. Please check the images for details.