128/97

Interval information

Ratio	128/97
Subgroup monzo	2.97 [7 -1⟩
Size in cents	480.1046¢
Name	nonacesimoseptimal subharmonic fourth
Color name	97u4
FJS name	[math]\displaystyle{ \text{P4}_{97} }[/math]
Special properties	reduced, reduced subharmonic
Tenney height (log2 nd)	13.5999
Weil height (log2 max(n, d))	14
Wilson height (sopfr(nd))	111
Harmonic entropy (Shannon, [math]\displaystyle{ \sqrt{nd} }[/math])	~4.17974 bits
Open this interval in xen-calc

128/97, the nonacesimoseptimal subharmonic fourth is a narrow fourth very close to that of 5edo, and is the first octave-reduced subharmonic after 4/3 that is (just barely) a diatonic fourth. The diatonic scale it generates is incredibly close to collapsed, with the "minor second" being less than a cent wide.

See also

• 97/64 – its octave complement
• Gallery of just intervals