25/22

Interval information

Ratio	25/22
Factorization	2-1 × 52 × 11-1
Monzo	[-1 0 2 0 -1⟩
Size in cents	221.3095¢
Names	ptolemismic whole tone, undecimal acute whole tone
Color name	1uyy2, luyoyo 2nd
FJS name	[math]\displaystyle{ \text{A2}^{5,5}_{11} }[/math]
Special properties	reduced
Tenney height (log2 nd)	9.10329
Weil height (log2 max(n, d))	9.28771
Wilson height (sopfr(nd))	23
[sound info]
Open this interval in xen-calc

25/22, the ptolemismic whole tone or undecimal acute whole tone, is an 11-limit interval. It is sharp of 9/8, the Pythagorean whole tone, by 100/99, the ptolemisma, hence the name. It is also flat of 8/7, the septimal major second, by 176/175, the valinorsma. Another interval close to it but simpler is 17/15, from which it is separated by 375/374.

See also

• 44/25 – its octave complement
• 33/25 – its fifth complement
• 25/11 – one octave higher
• Gallery of just intervals
• File:Ji-25-22-csound-foscil-220hz.mp3