(Book). This book explains the secret ingredients needed to obtain the very best tonal qualities when building acoustic string instruments. It includes an exploration of the tools and equipment needed, the methods to excite tones in the instrument, how to make the necessary changes, and how to achieve consistency and repeatability. The text focuses on tap tuning as it relates to mandolins, guitars, banjos, violins, ukuleles, dulcimers, pianos, and more. The DVD includes demonstrations of the acoustic phenomena described in the text.