18-EDD

De Wiki Purdal
Saltar a: navegación, buscar

Dot-Guide for 18-EDD instruments

18-EDD Fretboard is based on the formula (Scale_Length/(2^(x/18))). On first instance, the problem with a 18-EDD guitar is the fret-space for tuning it, because the '4/3' interval is between 2 steps, which in first instance, is suggerent a dot-guide like a 1/3-tone version of 13-EDD :

18-EDO_Dot-Guide_0.png
18-EDD Dot Guide, form 1

The dots are in the places 4· 7· 11· 14· 18: 22· 25· 29· 32· 36: 40· denoting a scale of 3L2s 4;3 Relation, 4 3 4 3 4 with the tuning-dot on 7th fret.

Another possibility for a 18-EDD dot-guide is with the 6-EDD subset :

18-EDO_Dot-Guide_1.png
18-EDD equal-sized 6-EDD form

This dot-guide leaves in blank spaces the 7th and 8th frets, which are the 2 spaces between the '4/3' interval.

Step (form 1) Purdal size Cent size | Step (form 2) Purdal size Cent size
01 550 66.6 | 01 550 66.6
02 1100 133.3 | 02 1100 133.3
03 1650 200 | 03· 1650 200
04· 2200 266.6 | 04 2200 266.6
05 2750 333.3 | 05 2750 333.3
06 3300 400 | 06· 3300 400
07· 3850 466.6 | 07 3850 466.6
08 4400 533.3 | 08 4400 533.3
09 4950 600 | 09· 4950 600
10 5500 666.6 | 10 5500 666.6
11· 6050 733.3 | 11 6050 733.3
12 6600 800 | 12· 6600 800
13 7150 866.6 | 13 7150 866.6
14· 7700 933.3 | 14 7700 933.3
15 8250 1000 | 15· 8250 1000
16 8800 1066.6 | 16 8800 1066.6
17 9350 1133.3 | 17 9350 1133.3
18\0: 9900\0 1200\0 | 18\0: 9900\0 1200\0