15-EDD

Dot-Guide for 15-EDD instruments

15-EDD Fretboard is based on the formula (Scale_Length/(2^(x/15))). 15-EDD characterise it by the factorizacion of the prime numbers 3 and 5, being enough interesting for musical purposes. A way for visualize 15-EDD on the fretboard is with the 5-EDD subset :

15-EDD equal-sized Dot-Guide

In principle, can denote to 15-EDD like a 1/3-tone version of equal-sized 10-EDD dot-guide, in fact, 15-EDD grants a high consistency in itself, but this way can be valid too:

15-EDD Alternative Dot-Guide

The dots are in the places 3· 4· 7· 8· 11· 12· 15: 18· 19· 22· 23· 26· 27· 30: & 33· consolidating a very nice and decorative symmetric dot-guide over 15-EDD fretboard, and denoting a scale of 4L3s 3;1 Relation, 3 1 3 1 3 1 3.

Step (form 1)	Purdal size	Cent size	|	Step (form 2)	Purdal size	Cent size
01	660	80	|	01	660	80
02	1320	160	|	02	1320	160
03·	1980	240	|	03·	1980	240
04	2640	320	|	04·	2640	320
05	3300	400	|	05	3300	400
06·	3960	480	|	06	3960	480
07	4620	560	|	07·	4620	560
08	5280	640	|	08·	5280	640
09·	5940	720	|	09	5940	720
10	6600	800	|	10	6600	800
11	7260	880	|	11·	7260	880
12·	7920	960	|	12·	7920	960
13	8580	1040	|	13	8580	1040
14	9240	1120	|	14	9240	1120
15\0:	9900\0	1200\0	|	15\0:	9900\0	1200\0