16/15

Interval information

Ratio	16/15
Factorization	24 × 3-1 × 5-1
Monzo	[4 -1 -1⟩
Size in cents	111.7313¢
Names	diatonic semitone, classic minor second
Color name	g2, gu 2nd
FJS name	[math]\displaystyle{ \text{m2}_{5} }[/math]
Special properties	square superparticular, reduced, reduced subharmonic
Tenney norm (log2 nd)	7.90689
Weil norm (log2 max(n, d))	8
Wilson norm (sopfr(nd))	16
[sound info]
Open this interval in xen-calc

The 5-limit just diatonic semitone is the superparticular interval 16/15 -- the difference between the major third 5/4 and the fourth 4/3, and between 3/2 and 8/5.

When this ratio is taken as a comma to be tempered, it produces father temperament, where 4/3 and 5/4 are equated. In this temperament, major thirds and fifths become octave-inverses of each other.

See also

• 15/8 its inverse interval
• Gallery of just intervals