Ptolemismic chords: Difference between revisions
Update the article Tags: Mobile edit Mobile web edit |
m Improve readability; recategorize |
||
| Line 4: | Line 4: | ||
The ptolemismic triad consists of [[11/8]] and a stack of two [[6/5]]'s closing at the octave: | The ptolemismic triad consists of [[11/8]] and a stack of two [[6/5]]'s closing at the octave: | ||
* | * 1–11/8–5/3 with steps of 11/8, 6/5, 6/5. | ||
For tetrads, there are two palindromic chords and two pairs of chords in inverse relationship. The palindromic chords are | For tetrads, there are two palindromic chords and two pairs of chords in inverse relationship. The palindromic chords are | ||
* | * 1–9/8–5/4–9/5 with steps 9/8, 11/10, 16/11, 11/10; | ||
* | * 1–3/2–5/3–9/5 with steps 3/2, 11/10, 12/11, 11/10. | ||
The inversely related pairs of chords are | The inversely related pairs of chords are | ||
* | * 1–11/8–3/2–5/3 with steps 11/8, 12/11, 11/10, 6/5, and its inverse | ||
* | * 1–11/8–5/3–11/6 with steps 11/8, 6/5, 11/10, 12/11; | ||
* | * 1–5/4–11/8–5/3 with steps 5/4, 11/10, 6/5, 6/5, and its inverse | ||
* | * 1–11/10–11/8–5/3 with steps 11/10, 5/4, 6/5, 6/5. | ||
For pentads, there are two palindromic chords and a pair of chords in inverse relationship. The palindromic chords are | For pentads, there are two palindromic chords and a pair of chords in inverse relationship. The palindromic chords are | ||
* | * 1–11/8–3/2–5/3–11/6 with steps 11/8, 12/11, 11/10, 11/10, 12/11; | ||
* | * 1–9/8–5/4–3/2–9/5 with steps 9/8, 11/10, 6/5, 6/5, 11/10. | ||
The inversely related pair of chords is | The inversely related pair of chords is | ||
* | * 1–5/4–11/8–3/2–5/3 with steps 5/4, 11/10, 12/11, 11/10, 6/5, and its inverse | ||
* | * 1–11/10–11/8–5/3–11/6 with steps 11/10, 5/4, 6/5, 11/10, 12/11. | ||
Equal | [[Equal temperament]]s with ptolemismic chords include {{EDOs| 19, 22, 37, 41, and 104 }}. | ||
[[Category:11-odd-limit]] | [[Category:11-odd-limit chords]] | ||
[[Category:Essentially tempered chords]] | [[Category:Essentially tempered chords]] | ||
[[Category:Triads]] | [[Category:Triads]] | ||