25/18: Difference between revisions

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{{Infobox Interval
{{Infobox Interval
| Icon =
| Name = classic(al) augmented fourth, diptolemaic augmented fourth
| Ratio = 25/18
| Monzo = -1 -2 2
| Cents = 568.71743
| Name = classic augmented fourth, <br/> pental augmented fourth
| Color name = yy4, yoyo 4th
| Color name = yy4, yoyo 4th
| FJS name = A4<sup>25</sup>
| Sound = jid_25_18_pluck_adu_dr220.mp3
| Sound = jid_25_18_pluck_adu_dr220.mp3
}}
}}


'''25/18''', the classic ([[5-limit]]) augmented fourth, is 325/324 (5.3 cents) sharp of [[18/13]], and is the interval between [[6/5]] and [[5/3]] or [[9/5]] and [[5/2]] respectively.  
'''25/18''', the '''classic(al) augmented fourth''' or '''diptolemaic augmented fourth''', is a [[5-limit]] [[tritone]]. It is the [[interval]] between [[6/5]] and [[5/3]] or [[9/5]] and [[5/2]] respectively. It is [[325/324]] (5.3 [[cent]]s) sharp of [[18/13]]


== See also ==
== See also ==
* [[36/25]] – its [[octave complement]]
* [[Gallery of just intervals]]
* [[Gallery of just intervals]]
* [[36/25]] - its [[inversion]]


[[Category:5-limit]]
[[Category:Interval]]
[[Category:Ratio]]
[[Category:Tritone]]
[[Category:Tritone]]


[[Category:todo:expand]]
[[Category:todo:expand]]

Latest revision as of 19:26, 28 January 2023

Interval information
Ratio 25/18
Factorization 2-1 × 3-2 × 52
Monzo [-1 -2 2
Size in cents 568.7174¢
Names classic(al) augmented fourth,
diptolemaic augmented fourth
Color name yy4, yoyo 4th
FJS name [math]\displaystyle{ \text{A4}^{5,5} }[/math]
Special properties reduced
Tenney norm (log2 nd) 8.81378
Weil norm (log2 max(n, d)) 9.28771
Wilson norm (sopfr(nd)) 18

[sound info]
Open this interval in xen-calc

25/18, the classic(al) augmented fourth or diptolemaic augmented fourth, is a 5-limit tritone. It is the interval between 6/5 and 5/3 or 9/5 and 5/2 respectively. It is 325/324 (5.3 cents) sharp of 18/13

See also