4/3

Interval information
Ratio	4/3
Factorization	22 × 3-1
Monzo	[2 -1⟩
Size in cents	498.045¢
Name	just perfect fourth
Color name	w4, wa 4th
FJS name	[math]\displaystyle{ \text{P4} }[/math]
Special properties	square superparticular,; reduced,; reduced subharmonic
Tenney norm (log2 nd)	3.58496
Weil norm (log2 max(n, d))	4
Wilson norm (sopfr(nd))	7
	https://en.xen.wiki/w/File:Jid_4_3_pluck_adu_dr220.mp3; [sound info]
	Open this interval in xen-calc

4/3 is the frequency ratio of the just perfect fourth. Its inversion is the perfect fifth, 3/2.

See also