20-EDD

Dot-Guide for 20-EDD instruments

20-EDD Fretboard is based on the formula (Scale_Length/(2^(x/20))). 20-EDD contains in its internal structure both 10 and 5 EDDs, in which a first instance for a dot-guide on 20-EDD is with this :

20-EDD equal-sized 5-EDD form

Other form for orientation in 20-EDD fretboard is with the subset 04-EDD system :

20-EDD equal-sized 4-EDD form

Another way for the 20-EDD dot-guide is by the similar way of 14-EDD :

20-EDO Dot-Guide, Extended form

The dots are in the places 4· 7· 10· 13· 16· 20: 24· 27· 30· 33· 36· 40: 44· visualizing a scale of 2L4s 4;3 Relation, 4 3 3 3 3 4

Step (form 1)	Purdal size	Cent size	|	Step (form 2)	Purdal size	Cent size	|	Step (form 3)	Purdal size	Cent size
01	495	60	|	01	495	60	|	01	495	60
02	990	120	|	02	990	120	|	02	990	120
03	1485	180	|	03	1485	180	|	03	1485	180
04·	1980	240	|	04	1980	240	|	04·	1980	240
05	2475	300	|	05·	2475	300	|	05	2475	300
06	2970	360	|	06	2970	360	|	06	2970	360
07	3465	420	|	07	3465	420	|	07·	3465	420
08·	3960	480	|	08	3960	480	|	08	3960	480
09	4455	540	|	09	4455	540	|	09	4455	540
10	4950	600	|	10·	4950	600	|	10·	4950	600
11	5445	660	|	11	5445	660	|	11	5445	660
12·	5940	720	|	12	5940	720	|	12	5940	720
13	6435	780	|	13	6435	780	|	13·	6435	780
14	6930	840	|	14	6930	840	|	14	6930	840
15	7425	900	|	15·	7425	900	|	15	7425	900
16·	7920	960	|	16	7920	960	|	16·	7920	960
17	8415	1020	|	17	8415	1020	|	17	8415	1020
18	8910	1080	|	18	8910	1080	|	18	8910	1080
19	9405	1140	|	19	9405	1140	|	19	9405	1140
20\0:	9900\0	1200\0	|	20\0:	9900\0	1200\0	|	20\0:	9900\0	1200\0