Gothic comma: Difference between revisions

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{{Infobox Interval
{{Infobox Interval
| Ratio = 134217728/129140163
| Ratio = 134217728/129140163
| Name = 17-comma, gothic comma, Pythagorean gothma, Pythagorean double-diminished third
| Name = gothic comma, 17-comma, Pythagorean gothma, Pythagorean double-diminished third
| Color name = ssw3, sasawa 3rd,<br>Wa-17 comma
| Color name = ssw3, sasawa 3rd,<br>17wM, sewama
| Comma = yes
| Comma = yes
}}
}}
The '''17-comma''', otherwise known as the '''gothic 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'''.  
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 152 the comma is tempered out if and only if 17 divides it, for example [[17edo]], [[34edo]] or [[68edo]].  
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 ==
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# 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'' (adjective: ''gothmic'') 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|.  
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* [[Gallery of just intervals]]
* [[Gallery of just intervals]]
* [[Medium comma]]
* [[Medium comma]]
[[Category:Commas named for other reasons]]