8edt: Difference between revisions

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== Theory ==

As the double of [[4edt]], it is the ~~analog~~ of [[~~10edo~~]] ~~being~~ the ~~double~~ of [[~~5edo~~]]. However, the full 3:5:7 triad is already present in 4edt which is unlike the situation in 10edo where 4:5:6 gains a new better approximation than the sus4 triad in [[5edo]]. More precisely, 8edt is [[enfactoring|enfactored]] in the 3.5.7 subgroup.

If you view things from the perspective of the [[4L 5s (3/1-equivalent)|4L 5s<3/1>]] Bohlen-Pierce MOS scale, then 8edt could be seen as an analog of [[10edo]], since 8edt is a double of [[4edt]] (the collapsed form of the 4L 5s<3/1> scale, while 10edo is the double of [[5edo]] (the collapsed form of the [[5L 2s]] diatonic scale). However, the full 3:5:7 triad is already present in 4edt which is unlike the situation in 10edo where 4:5:6 gains a new better approximation than the sus4 triad in [[5edo]]. More precisely, 8edt is [[enfactoring|enfactored]] in the 3.5.7 subgroup.

What it does introduce are flat [[2/1]] pseudo-octaves and sharp [[3/2]] perfect fifths, making it related to 5edo melodically. It is equivalent to 5edo with the [[3/1]] made just, by compressing the octave by 11.3 cents.

What it does introduce are flat [[2/1]] pseudo-octaves and sharp [[3/2]] perfect fifths, making it related to 5edo melodically. It is equivalent to 5edo with the [[3/1]] made just, by compressing the octave by 11.3 cents, which has the side effect of bringing the step size slightly closer to [[8/7]].

=== Harmonics ===

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== Interval table ==

== See also ==

* [[Alpha, beta, and gamma family of equal divisions]]

[[Category:Macrotonal]]

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 == Theory ==
-As the double of [[4edt]], it is the analog of [[10edo]] being the double of [[5edo]]. However, the full 3:5:7 triad is already present in 4edt which is unlike the situation in 10edo where 4:5:6 gains a new better approximation than the sus4 triad in [[5edo]]. More precisely, 8edt is [[enfactoring|enfactored]] in the 3.5.7 subgroup.
+If you view things from the perspective of the [[4L 5s (3/1-equivalent)|4L 5s<3/1>]] Bohlen-Pierce MOS scale, then 8edt could be seen as an analog of [[10edo]], since 8edt is a double of [[4edt]] (the collapsed form of the 4L 5s<3/1> scale, while 10edo is the double of [[5edo]] (the collapsed form of the [[5L 2s]] diatonic scale). However, the full 3:5:7 triad is already present in 4edt which is unlike the situation in 10edo where 4:5:6 gains a new better approximation than the sus4 triad in [[5edo]]. More precisely, 8edt is [[enfactoring|enfactored]] in the 3.5.7 subgroup.
-What it does introduce are flat [[2/1]] pseudo-octaves and sharp [[3/2]] perfect fifths, making it related to 5edo melodically. It is equivalent to 5edo with the [[3/1]] made just, by compressing the octave by 11.3 cents.
+What it does introduce are flat [[2/1]] pseudo-octaves and sharp [[3/2]] perfect fifths, making it related to 5edo melodically. It is equivalent to 5edo with the [[3/1]] made just, by compressing the octave by 11.3 cents, which has the side effect of bringing the step size slightly closer to [[8/7]].
 === Harmonics ===
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 == Interval table ==
 {{Interval table}}
+== See also ==
+* [[Alpha, beta, and gamma family of equal divisions]]
 [[Category:Macrotonal]]

8edt: Difference between revisions

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