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

Other form for orientation in 20-EDD fretboard is with the subset 04-EDD system :
20-EDD fretboard 4-EDD dot-guide.png
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_2.png
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