Patent ID: 7423208

Claim:
A fret mapping method for determining the position of string contact regions along the length of a fret of a stringed instrument, said method utilizing a test instrument having a body provided with a bridge for supporting a plurality of strings and a neck which includes a nut for supporting the plurality of strings, the neck of the test instrument being provided with a fret board that is longitudinally movable toward and away from the nut of the test instrument, the fret board defining a distal edge and including at least one fret positioned at a known distance from the distal edge of the fret board, said method including the steps of: tuning the plurality of strings to a desired open tuning; positioning the fret board such that the distal edge of the fret board is a known distance from the nut; playing a note on a string at a fret on the fret board and determining whether the note is sharp or flat; and correcting any intonation deviation by moving the fret board with respect to the nut of the test instrument such that the fret at which the note has been played is moved to a position to produce correct intonation.