Guitar Frets are laid out to accomplish an equal tempered division of the octave. Each set of twelve frets represents an octave. The twelfth fret divides the scale length exactly into two halves, and the 24th fret position divides one of those halves in half again. The ratio of the spacing of two consecutive frets is formula_1 (twelfth root of two). In practice, luthiers determine fret positions using the constant 17.817—an approximation to 1/(1-1/formula_1). If the nth fret is a distance x from the bridge, then the distance from the (n+1)th fret to the bridge is x-(x/17.817). Frets are available in
Fret the guitar that can range from a small annoyance, to severe enough to dampen the note and greatly reduce sustain. Sometimes, fret buzz can be so minimal that there is only a small change in the tone (timbre) of the note, without any noticeable buzzing. Fret buzz can be caused by different things: Fret buzz is evident in some famous recordings; an example is "Friends" by Led Zeppelin (although this example is undoubtedly caused by alternate open tunings that reduce string tension). In some songs, such as "My Last Serenade" by Killswitch Engage, the guitars are tuned to Dropped C