245/242

Interval information

Ratio	245/242
Factorization	2-1 × 5 × 72 × 11-2
Monzo	[-1 0 1 2 -2⟩
Size in cents	21.32964¢
Name	frostma
FJS name	[math]\displaystyle{ \text{M2}^{5,7,7}_{11,11} }[/math]
Special properties	reduced
Tenney height (log2 nd)	15.8555
Weil height (log2 max(n, d))	15.8733
Wilson height (sopfr(nd))	43
Comma size	small
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The frostma (ratio: 245/242, monzo: [-1 0 1 2 -2⟩) is a small 11-limit comma named after Frostburn used in the construction of the frostburn temperament.

It can be factored into (243/242)(245/243).

When tempered out, it equates a stack of two 11/7s with a 5/2 major tenth.

History

Before the comma got the name frostma, it was known as the cassacot, probably derived from cassandra and tetracot. However, cassandra was a misnomer for andromeda. The temperament's name was later corrected. Since then, cassacot has lost its root, thus justifying the new name.

Quotes

"245/242 should be the frostma because 243/242 is the rastma…" —Praveen Venkataramana

See also

• Small comma