22-EDD

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 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 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 :

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