81/44

Interval information

Ratio	81/44
Factorization	2-2 × 34 × 11-1
Monzo	[-2 4 0 0 -1⟩
Size in cents	1056.502¢
Names	2nd undecimal neutral seventh, Alpharabian tendoneutral seventh
Color name	1u2, ilu seventh
FJS name	[math]\displaystyle{ \text{M7}_{11} }[/math]
Special properties	reduced
Tenney height (log2 nd)	11.7993
Weil height (log2 max(n, d))	12.6797
Wilson height (sopfr(nd))	27
Harmonic entropy (Shannon, [math]\displaystyle{ \sqrt{nd} }[/math])	~4.22407 bits
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81/44, the 2nd undecimal neutral seventh, is an interval of about 1056.5 cents. It is 352/351 (4.9 cents) flat of 24/13 and 243/242 (7.1 cents) sharp of 11/6. In Alpharabian tuning it is known as the Alpharabian tendoneutral seventh.

See also

• 88/81 – its octave complement
• Gallery of just intervals