56/45: Difference between revisions
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Rework to reflect the progress thanks to the establishment of the aberschisma |
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{{Infobox Interval | {{Infobox Interval | ||
| Name = septimal narrow major third, marvel-ptolemaic major third, aberschismic diminished fourth | |||
| Color name = zg4, zogu 4th | |||
| Name = septimal narrow major third, | |||
| Color name = | |||
| Sound = jid_56_45_pluck_adu_dr220.mp3 | | Sound = jid_56_45_pluck_adu_dr220.mp3 | ||
}} | }} | ||
'''56/45''', conventionally known as the '''septimal narrow major third''' or '''marvel-ptolemaic major third''', is flat of the [[81/64|Pythagorean major third]] by [[3645/3584]], namely a [[81/80|syntonic comma]] plus a [[225/224|marvel comma]]. However, it functions more commonly as a diminished fourth, flat of the [[8192/6561|Pythagorean diminished fourth]] by an [[aberschisma]]. This gives rise to the more precise name '''aberschismic diminished fourth''', and in fact it arises as the interval between various [[9-odd-limit]] consonances – between [[5/4]] and [[14/9]], between [[9/7]] and [[8/5]], between [[9/8]] and [[7/5]], and between [[10/7]] and [[16/9]] – with it also being [[6/5]] away from the marvelous fifth, [[112/75]]. | |||
According to [[Ozan Yarman]], the perde segah of [[Arabic, Turkish, Persian music|Turkish maqam music]] should range from 56/45 to 5/4. | |||
== Temperaments == | |||
[[Marvel]] tempering equates this interval with the [[5/4|classical major third]] and turns chords like 1–5/4–8/5 or 1–5/4–14/9 into [[essentially tempered chord]]s. | |||
== Approximation == | |||
This interval is a third of a cent flatter than 6\19, the major third of [[19edo]]. | |||
{{Interval edo approximation|56/45}} | |||
== See also == | == See also == | ||
* [[45/28]] – its [[octave complement]] | |||
* [[45/28]] – its octave complement | * [[135/112]] – its [[fifth complement]] | ||
* [[135/112]] – its fifth complement | |||
* [[Gallery of just intervals]] | * [[Gallery of just intervals]] | ||
[[Category:Third]] | [[Category:Third]] | ||
[[Category:Major third]] | [[Category:Major third]] | ||
[[Category: | [[Category:Fourth]] | ||
[[Category: | [[Category:Diminished fourth]] | ||
[[Category:Aberschismic]] | |||