22-EDD

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Dot-Guide for 22-EDD instruments

22-EDD Fretboard is based on the formula (Scale_Length/(2^(x/22))). For a first instance, the dot-guide on 22-EDD fretboard will be like the sameness of 17 & 12 EDDs :

22-EDD fretboard 0.png
22-EDD dot-guide form 1

The dots are in the places 5· 9· 13· 17· 22: 27· 31· 35· 39· 44: denoting a scale of 2L3s 5;4 Relation, 5 4 4 4 5.

But other approach for 22-EDD dot-guide is valid too :

22-EDD fretboard 1.png
22-EDD dot-guide form 2

The dots are in the places 5· 8· 11· 14· 17· 22: 27· 30· 33· 36· 39· 44: denoting a scale of 2L4s 5;3 Relation, 5 3 3 3 3 5.

Step (form 1) Purdal size Cent size | Step (form 2) Purdal size Cent size
01 450 54.54 | 01 450 54.54
02 900 109.09 | 02 900 109.09
03 1350 163.63 | 03 1350 163.63
04 1800 218.18 | 04 1800 218.18
05· 2250 272.72 | 05· 2250 272.72
06 2700 327.27 | 06 2700 327.27
07 3150 381.81 | 07 3150 381.81
08 3600 436.36 | 08· 3600 436.36
09· 4050 490.90 | 09 4050 490.90
10 4500 545.45 | 10 4500 545.45
11 4950 600 | 11· 4950 600
12 5400 654.54 | 12 5400 654.54
13· 5850 709.09 | 13 5850 709.09
14 6300 763.63 | 14· 6300 763.63
15 6750 818.18 | 15 6750 818.18
16 7200 872.72 | 16 7200 872.72
17· 7650 927.27 | 17· 7650 927.27
18 8100 981.81 | 18 8100 981.81
19 8550 1036.36 | 19 8550 1036.36
20 9000 1090.90 | 20 9000 1090.90
21 9450 1145.45 | 21 9450 1145.45
22\0: 9900 1200 | 22\0: 9900 1200

Another way for dot-guiding valid too, is like this :

22-EDD fretboard 2.png

Visually looks very simple, but it advocates a scale of 4L2s 5;1 Relation, 5 1 5 5 1 5.

Step Purdal size Cent size
01 450 54.54
02 900 109.09
03 1350 163.63
04 1800 218.18
05· 2250 272.72
06· 2700 327.27
07 3150 381.81
08 3600 436.36
09 4050 490.90
10 4500 545.45
11· 4950 600
12 5400 654.54
13 5850 709.09
14 6300 763.63
15 6750 818.18
16· 7200 872.72
17· 7650 927.27
18 8100 981.81
19 8550 1036.36
20 9000 1090.90
21 9450 1145.45
22\0: 9900 1200