User:CompactStar/Overtone scale: Difference between revisions
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An '''ADO''' (arithmetic divisions of the octave) or '''overtone scale''' is a tuning system which divides the octave arithmetically rather than logarithmically. This is equivalent to taking an octave-long subset of the harmonic series and make it repeat at the octave. For any C-ADO system, the m-th degree is equal to the ratio (C+m)/C. For example, | An '''ADO''' (arithmetic divisions of the octave) or '''overtone scale''' is a tuning system which divides the octave arithmetically rather than logarithmically. This is equivalent to taking an octave-long subset of the harmonic series and make it repeat at the octave. For any C-ADO system, the m-th degree is equal to the ratio (C+m)/C. For example, the [[5ado]] system consists of the 5th to 10th harmonics: | ||
{| class="wikitable" | |||
|- | |||
| harmonic | |||
| 5 | |||
| 6 | |||
| 7 | |||
| 8 | |||
| 9 | |||
| 10 | |||
|- | |||
| JI ratio | |||
| [[1/1]] | |||
| [[6/5]] | |||
| [[7/5]] | |||
| [[8/5]] | |||
| [[9/5]] | |||
| [[2/1]] | |||
|} | |||
For an ADO system, the distance between interval ratios is equal, rather than the distance between their logarithms like in EDO systems. All ADOs are subsets of [[just intonation]]. ADOs with more divisors such as [[Highly_composite_equal_division|highly composite]] ADOs generally have more useful just intervals. | |||
If the first division is <math>R_1</math> (which is ratio of C/C) and the last , <math>R_n</math> (which is ratio of 2C/C), with common difference of d | If the first division is <math>R_1</math> (which is ratio of C/C) and the last , <math>R_n</math> (which is ratio of 2C/C), with common difference of d |