From Xenharmonic Wiki
Jump to navigation Jump to search
Interval information
Ratio 49/40
Factorization 2-3 × 5-1 × 72
Monzo [-3 0 -1 2
Size in cents 351.3381¢
Name larger septimal neutral third
Color name zzg4, zozogu 4th
FJS name [math]\text{d4}^{7,7}_{5}[/math]
Special properties reduced
Tenney height (log2 nd) 10.9366
Weil height (log2 max(n, d)) 11.2294
Wilson height (sopfr (nd)) 25
Harmonic entropy
(Shannon, [math]\sqrt{n\cdot d}[/math])
~4.5916 bits

[sound info]
open this interval in xen-calc

49/40, the larger septimal neutral third, is only 2401/2400 (0.72 ¢) sharp of 60/49, the smaller septimal neutral third. In breed tempering, these are equated, dividing the fifth exactly in half. It is also 441/440 (3.9 ¢) sharp of 11/9, and this is one of the ways 11-limit harmony is introduced into 7-limit scales. In particular, it is the interval between 8/7 and 7/5.

See also