144/125: Difference between revisions

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+name and explain the idea behind them; remove comma tag cuz it's pretentious
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{{Infobox Interval
{{Infobox Interval
| Name = classic diminished third
| Name = classic(al) diminished third, triptolemaic diminished third
| Color name = g<sup>3</sup>3, trigu 3rd
| Color name = g<sup>3</sup>3, trigu 3rd
| Sound = jid_144_125_pluck_adu_dr220.mp3
| Sound = jid_144_125_pluck_adu_dr220.mp3
| Comma = 1
}}
}}


'''144/125''', the '''classic diminished third''', about 245 [[cent]]s in size, is a just interval in the [[5-limit]]. It can be obtained by subtracting [[6/5]], the classic minor third, by [[25/24]], the classic chroma. In any [[kleismic]] system, it is tuned to an exact semifourth, tempered together with [[125/108]]. The [[university temperament]] treats it as a comma.
'''144/125''', the '''classic diminished third''', about 245 [[cent]]s in size, is a just interval in the [[5-limit]]. It can be obtained by subtracting [[6/5]], the classic minor third, by [[25/24]], the classic chroma. It is also the Pythagorean diminished third (65536/59049) flattened by three [[81/80|syntonic commas]], which lends itself to the term ''triptolemaic''.
 
In any [[kleismic]] system, it is tuned to an exact semifourth, tempered together with [[125/108]]. The [[university temperament]] treats it as a comma.


== Approximation ==
== Approximation ==

Revision as of 06:46, 13 July 2023

Interval information
Ratio 144/125
Factorization 24 × 32 × 5-3
Monzo [4 2 -3
Size in cents 244.9689¢
Names classic(al) diminished third,
triptolemaic diminished third
Color name g33, trigu 3rd
FJS name [math]\displaystyle{ \text{d3}_{5,5,5} }[/math]
Special properties reduced
Tenney norm (log2 nd) 14.1357
Weil norm (log2 max(n, d)) 14.3399
Wilson norm (sopfr(nd)) 29

[sound info]
Open this interval in xen-calc

144/125, the classic diminished third, about 245 cents in size, is a just interval in the 5-limit. It can be obtained by subtracting 6/5, the classic minor third, by 25/24, the classic chroma. It is also the Pythagorean diminished third (65536/59049) flattened by three syntonic commas, which lends itself to the term triptolemaic.

In any kleismic system, it is tuned to an exact semifourth, tempered together with 125/108. The university temperament treats it as a comma.

Approximation

This interval is especially close to the 10th step of 49edo.

See also