09-EDD
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Dot-Guide for 9-EDD instruments
9-EDD Fretboard is based on the formula (Scale_Length/(2^(x/9))). The dot-guide in 9-EDD, is seemed with 12-EDD:
The dots are in the places 2· 4· 5· 7· 9: 11· 13· 14· 16· 18: & 20· showing a consistent scale of 4L1s 2;1 Relation, 2 2 1 2 2.
| Step | Purdal size | Cent size |
| 1 | 1100 | 133.3 |
| 2· | 2200 | 266.6 |
| 3 | 3300 | 400 |
| 4· | 4400 | 533.3 |
| 5· | 5500 | 666.6 |
| 6 | 6600 | 800 |
| 7· | 7700 | 933.3 |
| 8 | 8800 | 1066.6 |
| 9\0: | 9900\0 | 1200\0 |