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
Eight-string guitar and six-string variants. The standard tuning (from low to high) is F#, B, E, A, D, G, B, E. Many prefer to tune the F# to a low E (E1), the same note as the lowest string on a four-string electric bass in standard tuning, and providing the guitar with a fuller sound by having three different E strings. Like the seven-string, the first mass-produced eight-string guitar was made by Ibanez guitars in Japan; the RG2228. The main design issue faced with an eight-string guitar is tuning stability with the lower strings. This is due to the neck being constructed