Will this change the sound of the guitar...? A thorough investigation into the mysteries of sound that everyone has! "Does it change the sound of the guitar?" is the central question that Director Idonuma takes on as his serial feature "Digimart Underground Laboratory" on the musical instrument information site Digimart Magazine (https://www.digimart.net/magazine/), where he experiments with all sorts of things. This deep and popular series has finally been published as a book! In addition to 22 particularly popular articles, the book also includes a special edition, "Pickup Verification Experiments." Of course, all of the projects in this book are video compatible, so you can watch the experiments on your smartphone or PC. If you can experience the sound through the video, the project will definitely be twice as fun! Please enjoy it together with the video. [CONTENTS] PART 1: The Guitar Body How does the number of coil turns and the type of magnet affect the sound? Does the tightness of a Stratocaster's screws affect the sound? -Does adding a weight to the head change the sound of a guitar? -Does removing the paint from a guitar change the sound? -Does the sound change depending on the type of solder and how it is applied? - Will changing the neck plate on a Strat change the sound? -How does changing the wiring change the sound of a guitar? -How does the sound change when the inside of a Stratocaster's cavity is shielded?-How does the sound quality and operability change depending on how you attach the Stratocaster's tremolo spring (back spring)? -How does changing the nut change the sound of a guitar? -How does changing the saddle on a Stratocaster change the sound of the guitar? -How different is the sound between a Stratocaster with a maple fingerboard and a rosewood fingerboard? How does changing the pots change the sound of your guitar? How does the thickness of the neck affect the sound of a guitar? -Does the way the pickup is installed change the sound of the guitar? How does changing the capacitor affect the sound of your guitar? PART 2: Guitar Accessories - How do different types of strings affect the sound and playability of a guitar? -How does the sound of a guitar change depending on the pick? -How does the number of wraps and how the strings are wrapped change the sound of a guitar? -How does the sound of a guitar change when you change the cable plug? PART 3: Effects pedals: Does the case affect the sound of an effects pedal?・Effector Case Experiment Returns: How does changing the op-amp change the sound of an overdrive pedal? PART 4 Special Edition: Pickup Verification Experiment - How does the pickup sound change depending on the type of magnet and number of coil turns?