All fifths is a tuning for guitar, in which the interval between each string is a perfect fifth. The conventional "standard tuning" consists of perfect fourths and a single major third between the G and B strings. "All Fifths" tuning therefore creates an interval of 11 half steps larger between the lowest and highest string than conventional tuning.
While the idea of an "all fifths" tuning is aesthetically satisfying, there are certain difficulties in its usage, especially since some guitars do not handle the increased tension well. Tuning the high string to B4 requires special strings that can withstand the higher tension, and therefore limit playing techniques such as bending on the high B. Transposing lower (below the suggested C) would be an inadequate substitute, as it moves below the resonant frequencies of the acoustic guitar body. The New Standard Tuning of Guitar Craft (C-G-D-A-E-G, low to high) is intended to be a more practical approach to a predominantly fifths-based tuning.
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