Gothic comma: Difference between revisions
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{{Infobox Interval | {{Infobox Interval | ||
| Ratio = 134217728/129140163 | | Ratio = 134217728/129140163 | ||
| Name = 17-comma, | | Name = gothic comma, 17-comma, Pythagorean gothma, Pythagorean double-diminished third | ||
| Color name = ssw3, sasawa 3rd,<br> | | Color name = ssw3, sasawa 3rd,<br>17wM, sewama | ||
| Comma = yes | | Comma = yes | ||
}} | }} | ||
The ''' | The '''gothic comma''', otherwise known as the '''17-comma''' or '''Pythagorean gothma''' ({{monzo|legend=1| 27 -17 }}, [[ratio]]: 134217728/129140163), is a [[3-limit]] interval of 66.765{{cent}}. It is the amount by which seventeen [[perfect fifth]]s fall short of ten [[octave]]s, or 2<sup>10</sup>/(3/2)<sup>17</sup>. If used as an interval in its own right, it is the '''Pythagorean double-diminished third'''. | ||
== Temperaments == | == Temperaments == | ||
Tempering out this comma in the 5-limit leads to the [[gothic]] temperament. For edos up to | Tempering out this comma in the 5-limit leads to the [[gothic]] temperament. For edos up to [[136edo|136]], the comma is tempered out if and only if 17 divides it, for example [[17edo]], [[34edo]] or [[68edo]]. | ||
== Terminology == | == Terminology == | ||
The names were given by [[Flora Canou]] in 2023. The first term ''gothic comma'' draws two inspirations: | The names were given by [[Flora Canou]] in 2023. The first term ''gothic comma'' draws two inspirations: | ||
# the neogothic tuning available in 17edo, and | # the [[neogothic]] tuning available in 17edo, and | ||
# the link of [[TAMNAMS Extension]] name and comma names by the analogy pair gothic : pytha<u>go</u>tonic :: mystery : pytha<u>mys</u>tonic. | # the link of [[TAMNAMS Extension]] name and comma names by the analogy pair gothic : pytha<u>go</u>tonic :: mystery : pytha<u>mys</u>tonic. | ||
Additionally, by coincidence, the term "gothic" fits into the naming scheme of the [[comptonesque]] temperament collection, representing Vector's project Not!Earth in which the Goths are a major culture group. | |||
The second term ''Pythagorean gothma'' is part of a series of step names in the [[Pythagorean tuning|Pythagorean]] [[diatonic scale]], where ''gothma'' refers to the double diminished 2-step, i.e. |3s - L|. | The second term ''Pythagorean gothma'' is part of a series of step names in the [[Pythagorean tuning|Pythagorean]] [[diatonic scale]], where ''gothma'' (adjective: ''gothmic'') refers to the double diminished 2-step, i.e. |3s - L|. | ||
== See also == | == See also == | ||
* [[Gallery of just intervals]] | * [[Gallery of just intervals]] | ||
* [[Medium comma]] | * [[Medium comma]] | ||
[[Category:Commas named for other reasons]] | |||