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

The dots reflects its inherent 5-EDD subset, 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).