A Guitar string begins to tremble back and forth when it is plucked, sending waves of vibrations down the instrument’s length. The air inside the body of the Guitar is moved by the vibrations as they travel down the strings to the soundboard. Air rushes out of the sound hole and strikes the rigid hardwood back and sides, producing a musical note. The first Guitars, which are thought to have been made around 500 years ago in Spain, were quiet. But as time went on, their bodies became bigger, and now, even without electronic amplification, they can compete with other loud instruments like violins and banjos. Understanding Your Guitar’s Scale Before you build your Guitar, you need be aware of a few key guidelines. Knowing your scale is the most crucial rule. The distance from the top of the Guitar bridge to the base of the instrument is known as the scale. Measure from the front of the Guitar, where it meets the ideogram on the neck, and multiply that measurement by two to determine t