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
Touch guitar interactions with plectrums and fingers can all be mimicked digitally: in some cases, fret spacing and relationships can also be customized. Touch guitar The touch guitar is a musical instrument of the guitar family which has either been designed or adapted to use a fretboard-tapping playing style. Although "Touch Guitar" was registered as a trademark by musician and instrument designer Markus Reuter in the late 2000s, the term has been used formally or informally for a variety of instruments since the 1950s. The touch-style playing technique has been traced back to a variety of sources and players (including Merle Travis)