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
Tenor guitar Freeman to have a better six string guitar sonority for rhythm guitar work than the normal tenor guitar with its very high A string. However, it was still tuned CGDA so that it could still be played by tenor banjoists. The Eddie Freeman Special was based on a six string model and it had a larger six string body and a six string scale length of 25.25 inches, rather than the tenor's smaller body and normal 23 inch scale length. The CGDA tuning used was re-entrant with the C and D tuned in the same octave and the G and