10-EDD

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Dot-Guide for 10-EDD instruments

10-EDD Fretboard is based on the formula (Scale_Length/(2^(x/10))). A common first contact with the 10-EDD is expressing the dot-guide like the sameness of 12-EDD :

10-EDO_Dot-Guide_0.png
10-EDD equal-sized 5-EDD form

But it can resumed like this :

10-EDO_Dot-Guide_1.png
10-EDD Dot-Guide, simplified form

In fact, this dot-guide conserves the relationship aspect for tune the strings in the 4th fret. The dots are in the places 3· 5· 7· 10: 13· 15· 17· & 20: visualizing a scale of 2L2s 3;2 Relation, 3 2 2 3.

Step Purdal size Cent size
01 990 120
02 1980 240
03· 2970 360
04 3960 480
05· 4950 600
06 5940 720
07· 6930 840
08 7920 960
09 8910 1080
10\0: 9900\0 1200\0

Note that the mark in the 7th fret is the 13° Harmonic, the 13/8 ratio: 6934,35 Purd. (840.528 Cents).