Classical guitar fingerboard and placed at points that divide the length of string mathematically. The strings' vibrating length is determined when the strings are pressed down behind the frets. Each fret produces a different pitch and each pitch spaced a half-step apart on the 12 tone scale. The ratio of the widths of two consecutive frets is the twelfth root of two (formula_1), whose numeric value is about 1.059463. The twelfth fret divides the string in two exact halves and the 24th fret (if present) divides the string in half yet again. Every twelve frets represents one octave. This arrangement of frets
Inlay (guitar) shape for their fret markers to create a brand identity set themselves apart from competitors. Gibson uses isosceles trapezoids while Fender uses dots, but others include lightning bolts, letters and numbers. Smaller dots are also usually inlaid into the upper edge of the fretboard or the neck so as to be more visible to the player who views the instrument from the side. LEDs or optical fiber can be employed to illuminate the markers. This is mostly employed by players who perform in front of live audiences where the lighting is either insufficient or constantly changing. On guitars, there are