361/360

Interval information

Ratio	361/360
Subgroup monzo	2.3.5.19 [-3 -2 -1 2⟩
Size in cents	4.802317¢
Names	go comma, dudon comma
Color name	19oog2, nonogu 2nd, Nonogu comma
FJS name	[math]\displaystyle{ \text{d2}^{19,19}_{5} }[/math]
Special properties	square superparticular, reduced
Tenney norm (log2 nd)	16.9877
Weil norm (log2 max(n, d))	16.9917
Wilson norm (sopfr(nd))	55
Comma size	small
S-expression	S19
Open this interval in xen-calc

361/360, the go comma or dudon comma, also described as the undevicesimal semitones comma is a 19-limit (also 2.3.5.19 subgroup) superparticular comma of about 4.8 cents. It is the difference between 19/18 and 20/19, the two undevicesimal semitones, as well as between 19/15 and 24/19, the two undevicesimal major thirds. It is also the difference between two stacked 19/18 and 10/9. By tempering it out is defined the dudon temperament, which enables the dudon chords.

It factors in the 2.3.5.7.11.13.19 subgroup as 364/363 * 43681/43680.

Etymology

The name go comma was named by Xenwolf in 2013. It is so named after go board, which has a 19×19 grid. However, dudon comma (named for Jacques Dudon) was attested much earlier.

See also

• Small comma
• List of superparticular intervals