Marveltwin chords: Difference between revisions
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There are 6 triads, 18 tetrads, 14 pentads and 3 hexads as 2.3.5.13 subgroup [[13-odd-limit]] essentially tempered chords. | There are 6 triads, 18 tetrads, 14 pentads and 3 hexads as 2.3.5.13 subgroup [[13-odd-limit]] essentially tempered chords. | ||
One marveltwin triad | One marveltwin triad is a palindrome since it identifies [[13/9]] by a stack of two [[6/5]] minor thirds, that is, | ||
* 1–6/ | * 1–6/5–13/9 with steps of 6/5, 6/5, [[18/13]]. | ||
It makes for an instructive comparison with the septimal diminished triad, 1–6/5–[[10/7]] in [[starling]], and might also be called a tridecimal diminished triad. | It makes for an instructive comparison with the septimal diminished triad, 1–6/5–[[10/7]] in [[starling]], and might also be called a tridecimal diminished triad. | ||
Another triad consists of a stack of two [[10/9]] whole tones | Another palindromic triad consists of [[16/13]] found as a stack of two [[10/9]] whole tones, that is, | ||
* 1–10/9–16/13 with steps of 10/9, 10/9, [[13/8]] | * 1–10/9–16/13 with steps of 10/9, 10/9, [[13/8]]. | ||
We also have those built by | |||
* 1–[[5/4]]–18/13 with steps of 5/4, 10/9, 13/9, and its inverse | * 1–[[5/4]]–18/13 with steps of 5/4, 10/9, 13/9, and its inverse | ||
* 1–10/9–18/13 with steps of 10/9, 5/4, 13/9; | * 1–10/9–18/13 with steps of 10/9, 5/4, 13/9; | ||