28/15

28/15, the septimal diatonic major seventh, is a 7-limit just interval of about 1080.6 cents.

Interval information

Ratio	28/15
Factorization	22 × 3-1 × 5-1 × 7
Monzo	[2 -1 -1 1⟩
Size in cents	1080.557¢
Name	septimal diatonic major seventh
FJS name	[math]\displaystyle{ \text{d8}^{7}_{5} }[/math]
Special properties	reduced
Tenney norm (log2 nd)	8.71425
Weil norm (log2 max(n, d))	9.61471
Wilson norm (sopfr(nd))	19
[sound info]
Open this interval in xen-calc

See also

• Gallery of just intervals
• 15/14 – its octave complement
• 10edo has a good approximation