125/72: Difference between revisions

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'''125/72''', the '''classic augmented sixth''' is [[5-limit]] just interval of about 955 [[cent]]. It can be obtained by adding [[5/3]], the classic major sixth, by [[25/24]], the classic chroma. It is also the Pythagorean augmented sixth (59049/32768) sharpened by three [[81/80|syntonic commas]], which lends itself to the term ''triptolemaic''.  
'''125/72''', the '''classic augmented sixth''' is [[5-limit]] just interval of about 955 [[cent]]. It can be obtained by widening [[5/3]], the classic major sixth, by [[25/24]], the classic chroma. It is also the Pythagorean augmented sixth (59049/32768) flattened by three [[81/80|syntonic commas]], which lends itself to the term ''triptolemaic''.  


In any [[kleismic]] system, it is tuned to an exact semitwelfth, tempered together with [[216/125]].
In any [[kleismic]] system, it is tuned to an exact semitwelfth, tempered together with [[216/125]].

Revision as of 18:54, 24 September 2024

Interval information
Ratio 125/72
Factorization 2-3 × 3-2 × 53
Monzo [-3 -2 3
Size in cents 955.0311¢
Names classic(al) augmented sixth,
triptolemaic augmented sixth
Color name y36, triyo 6th
FJS name [math]\displaystyle{ \text{A6}^{5,5,5} }[/math]
Special properties reduced
Tenney norm (log2 nd) 13.1357
Weil norm (log2 max(n, d)) 13.9316
Wilson norm (sopfr(nd)) 27

[sound info]
Open this interval in xen-calc

125/72, the classic augmented sixth is 5-limit just interval of about 955 cent. It can be obtained by widening 5/3, the classic major sixth, by 25/24, the classic chroma. It is also the Pythagorean augmented sixth (59049/32768) flattened by three syntonic commas, which lends itself to the term triptolemaic.

In any kleismic system, it is tuned to an exact semitwelfth, tempered together with 216/125.

Approximation

This interval is especially close to the 39th step of 49edo.

See also